View Full Version : G5 2.0 overrated big time.
mymemory
Nov 2, 2004, 01:58 PM
I just got a new G5 Dual 2.0
I have a production to do and I went to teh Apple Store and got an standar G5 to be return it in 2 weeks because I am using a 12" PB to work in After Effects and Final Cut Pro.
My first impression:
The only speed I see is when opening windows and folders but taht is it. I just made a render in a FCP file I had and there was not such incredible speed as everybody claim this things have, maybe 25% faster than my 1GHz PB.
I am going to keep testing but everything is way overrated to me... as usual.
PlaceofDis
Nov 2, 2004, 02:01 PM
how much ram do you have in there? remember that makes all the difference, not that i have a G5
edesignuk
Nov 2, 2004, 02:01 PM
"standard" meaning stock with 256MB RAM?
Jigglelicious
Nov 2, 2004, 02:02 PM
Try setting the speed of the PM to "maximum" instead of "automatic" under system preferences. That should greatly improve the speed.
MacsRgr8
Nov 2, 2004, 02:04 PM
????
I hope your future tests prove otherwise!
IMHO my upgrade from a Dual 1.25 GHz G4 to a Dual 1.8 GHz G5 (both with Radeon 9800 Pro, both with 1.5 GB RAM) was more than 25%. The only real benchmarks I have are gaming benchmarks (many are found over at Barefeats).
Have you got enough RAM in your G5?
LEgregius
Nov 2, 2004, 02:04 PM
That seems really unlikely. I have a 1.25GHz powerbook and does CPU related tasks about 20% faster than my old 1GHz powerbook. Could it be that you just don't have enough ram? 512MB of RAM doing heavy stuff like what you are doing is just not enough, the computer would be swapping like crazy.
Hmm. Since you bought it with the intent of returning it, why didn't you get the dual-2.5? And I suppose your thought is that the two-week (10 day actually, right) "rental" was worth $250? The dual-2.0 is faster than your PB. Faster disk, faster bus, faster processors. I'd be amazed if the true difference is only 25%. Still, isn't that worth your $250? An additional 2.5 days worth of processing - or, since you can use both systems, an additional 12.5 days of PB level processing - for the money?
bousozoku
Nov 2, 2004, 02:07 PM
Why did you get it? You seem to be saying that you have some special project and that's the only reason you're using it and also why you're not keeping it. It would seem that morals are overrated big time, as well.
cluthz
Nov 2, 2004, 02:08 PM
IF it has 256 mb (and your powerbook has 768mb or 1280 mb), i can understand why.
But especially rendering should be atleast 2-3x faster.
mkaake
Nov 2, 2004, 02:19 PM
Why did you get it? You seem to be saying that you have some special project and that's the only reason you're using it and also why you're not keeping it. It would seem that morals are overrated big time, as well.
you're forgetting - 80% of MR members don't quite know what that word even means, and calls you mean names when you bring it up in a sentance. one of my sigs used to read (this was a real quote from the forums) - yeah, I know it's illegal, but I'm going to do it anyway
*cough*
anyway, as said here already, ram seems to be your problem. other than the afformentioned issue with morality.
bousozoku
Nov 2, 2004, 02:41 PM
you're forgetting - 80% of MR members don't quite know what that word even means, and calls you mean names when you bring it up in a sentance. one of my sigs used to read (this was a real quote from the forums) - yeah, I know it's illegal, but I'm going to do it anyway
*cough*
anyway, as said here already, ram seems to be your problem. other than the afformentioned issue with morality.
Yes, well, I must have forgotten that. Yes, he does have a RAM problem. Maybe, he should have borrowed some.
jackieonasses
Nov 2, 2004, 02:45 PM
My old single 1.8 was about 50% faster (in garageband) then my new rev b 1ghz powerbook so it HAS to be a RAM problem, or you are just trying to find a reason for hating something.
williamsonrg
Nov 2, 2004, 03:27 PM
So to recap, he needs 1) RAM 2) morals 3) spellcheck and grammar check
Eevee
Nov 2, 2004, 03:54 PM
williamsonrg,
That's a good one!
stevehaslip
Nov 2, 2004, 03:56 PM
try again, there should be a considerable performance gain. There is for me.
Mr. Anderson
Nov 2, 2004, 04:01 PM
So to recap, he needs 1) RAM 2) morals 3) spellcheck and grammar check
for his credit - english isn't mymemory's first language - so come on people.
I hope that the speed issues are resolved, but if he's returning the machine in a couple weeks, getting more RAM might not be an option....
D
TLRedhawke
Nov 2, 2004, 04:18 PM
Trying to do a full Final Cut render on stock ram is like trying to win a Grand Prix with a showroom car. Just like you'd need to tweak the engine, and add special fuel and whatnot with a car, you need to add ram, and tweak the preferences for optimal performance with a computer. A G5 straight out of the box is a fast machine, but it's suited only for common purposes, as a showroom car is suited only for regular driving.
As for the morals thing, my store absolutely refuses to take machines back once they've been registered. Open box is one thing, but once you go through that setup procedure, you've incurred an hour or so worth of work on our part to restore it to original condition. For most people, this isn't an issue, as they think long and hard before dropping two or three grand on a new computer. The only ones we get back are IUFUs, which Apple takes care of. I can only hope that the place you bought yours from has the same policy.
monkeydo_jb
Nov 2, 2004, 04:57 PM
I am going to keep testing but everything is way overrated to me... as usual.
Everytime I see a thread by mymemory, I immediately think masterbation, underage sex
or (and this one is usually the case) complaining about Apple products.
It seems that your problem with the latter is that you're never satisfied with anything (sort of like your Location information for your profile :rolleyes: ).
I concur that more RAM would help, but as bousozoku said, you need to see if you can 'borrow'
more from Apple.
mymemory
Nov 2, 2004, 05:07 PM
And please do not think about me when you are masturbating.
I got the computer because I have a project to do by Friday and any Apple store around here had the 2.5 available, I would have to sing in a waiting list. Usually when I can I just get the top of the line of what Apple has.
After Effects is running very fast way more than Final Cut Pro. I had a layer with a full resolution movie and I applied the gussian blur and took 2 secons to complete 10 secs of the animation.
By the end of December I am going to apply for a dual 2.5. This computer has 512 ram.
I do not believe in benchmarks, they are all "wonderfull" but the real test drive is the best.
That is it for now.
bousozoku
Nov 2, 2004, 05:17 PM
And please do not think about me when you are masturbating.
I got the computer because I have a project to do by Friday and any Apple store around here had the 2.5 available, I would have to sing in a waiting list. Usually when I can I just get the top of the line of what Apple has.
After Effects is running very fast way more than Final Cut Pro. I had a layer with a full resolution movie and I applied the gussian blur and took 2 secons to complete 10 secs of the animation.
By the end of December I am going to apply for a dual 2.5. This computer has 512 ram.
I do not believe in benchmarks, they are all "wonderfull" but the real test drive is the best.
That is it for now.
I don't think you have to worry. It's not likely that anyone on the planet wants to think of you while masterbating. :D
I suppose you're going to borrow the dual 2.5 from Apple, as well? I think I'll let them know ahead of time, so they'll be ready for you when you return with this one.
mymemory
Nov 2, 2004, 05:28 PM
About not being satisfy...
Well, I can actually see how Apple is playing tricks here and there to give "everything" but not at once. Every once in a while Apple comes with an incredible product, probably the revision D of something. For example:
The Powermac 9600: it had 6 PCI ports and it came out when Apple had clones around. The 9600 had the expansions only the G5 can dream of.
The Powerbook Pismo: You could (yourself) upgrade the ram up to 1GB, the processor, the CD to a Super Drive, 2 bateries slots, PCIMCI slots, S-video and XVGA out put, audio I/O and 2 firewire and usb ports. Plus, the antena of the wireless thing was around the monitor frame (not keyboard frame as the Titanium). The only thing you couldnt upgrade (officially) was the video ram but there is a 64MB PCIMCI card for Apple displays.
The same thing with each line, except for the iPod I think.
So, Apple hasn't reach the perfect value/price machine in the G5 line in my opinion.
On the othet hand, dud, is very hard to move from a country like mine to a country like yours. I went to NYC because some one told me they had a lot of contacts for me and all of them were worthless. Despite NYC is not a mentally healthy place any way. Plus I came out from a very turbulent relationship and I saw myself completly alone in that place + dealing with the coldest side of the US culture. So, is not easy at all, I am 29 and I am in a point where I have to define myself as a person and I was changing culture, no job, no money ( I own $25.000 to my family), no friends at all and no chance to go back to my home country because there is a dictatorship stablished down there. I had to redifine everything in my life, even to redefine love and values and relationships. Friends were not the same, girlfriends neither, I see my family different and not to mention how to place myself in to the picture, the only thing I had the same was my name and birthday (and of course sexuality) but the rest was on hold to be redifine.
When you are 24 life still a playground, when you are 29 you already past that playground and now you are here again. When you are 24 your girlfriends are 21 and all you want to do is party, when you are 29 your gf are 27 or 28 and they want kids, then you would have to date the 21 to 25 yeras old girls again but... you have been doing that already, so to fit in to the new world is complicated.
Go to Bluckbusters and rent Don Juan de Marco... that was my life back in Venezulea, passion, romance and things like that, then rent Ethernal Sunshine of an Spotles Mind and then the Butter Fly Effect and then you may have an idea of what my life have been this year in NY.
Still, Apple is always playing tricks on us.
Chaszmyr
Nov 2, 2004, 05:30 PM
My Dual 2.0 is MUCH faster than my 1ghz AlBook
rdowns
Nov 2, 2004, 06:46 PM
I would have to sing in a waiting list.
Is that available on the iTMS?
mklos
Nov 2, 2004, 08:04 PM
And please do not think about me when you are masturbating.
I got the computer because I have a project to do by Friday and any Apple store around here had the 2.5 available, I would have to sing in a waiting list. Usually when I can I just get the top of the line of what Apple has.
After Effects is running very fast way more than Final Cut Pro. I had a layer with a full resolution movie and I applied the gussian blur and took 2 secons to complete 10 secs of the animation.
By the end of December I am going to apply for a dual 2.5. This computer has 512 ram.
I do not believe in benchmarks, they are all "wonderfull" but the real test drive is the best.
That is it for now.
The 512MB of RAM would be your problem. You absolutely CANNOT run any major video editing program with only 512MB of RAM. I'd at least double that 512 and maybe go for 1.5MB of RAM. Then you will see the speed come out. Also, make sure you have the latest version of Mac OS X installed. It may not be updated out of the box.
Hoef
Nov 2, 2004, 09:19 PM
Try setting the speed of the PM to "maximum" instead of "automatic" under system preferences. That should greatly improve the speed.
What is PM .... ?
scem0
Nov 2, 2004, 09:23 PM
I'd guess PowerMac :).
The 512MB of RAM would be your problem. You absolutely CANNOT run any major video editing program with only 512MB of RAM. I'd at least double that 512 and maybe go for 1.5MB of RAM. Then you will see the speed come out. Also, make sure you have the latest version of Mac OS X installed. It may not be updated out of the box.
Seems like, if you need at least 1GB of RAM to get the speed to 'come out', the PM (:)) is overrated.
scem0
Hoef
Nov 2, 2004, 09:28 PM
I'd guess PowerMac :).
You'd hope that PM is always maximum ...
Fukui
Nov 2, 2004, 09:34 PM
The 512MB of RAM would be your problem. You absolutely CANNOT run any major video editing program with only 512MB of RAM. I'd at least double that 512 and maybe go for 1.5MB of RAM. Then you will see the speed come out. Also, make sure you have the latest version of Mac OS X installed. It may not be updated out of the box.
Make that 2.0 GB, you'll want to have dual dimms (interleaving) for Best performance. IIRC...
mymemory
Nov 3, 2004, 08:37 AM
I'd guess PowerMac :).
Seems like, if you need at least 1GB of RAM to get the speed to 'come out', the PM (:)) is overrated.
scem0
You see! everybody complais about my threads but I am the one who always start to dig out the painful reality here and there :rolleyes:
Ok, I have the computer on my side and quietly is ding its job without complaining. Is very smooth even when I am searching in tho the file manus it gets stuck still while I am scrolling files up and down, I rememebr working with Silicon Graphics O2 and Indigo back in 1998 and THAT was an smooth scrolling and navigation.
After Effecs is the software that runs the best still. I do not see why the G5 need water cooling and those stuff, really for thye speed I am getting I do not know why it should make so much heat. Let see later on.
About ram... 512 is ok. about adding more ram.... well if with the engine of a BMW you can not scape from the police, what is so special about the price of car then?
The computer is not noisy at all, the powerbooks make more noise and I just realize there is just one firewire port in the back.
Well, so fas, so good, for sure I will get a dual 2.5 later on and add some good ram, anything better than a PC. And of course a 30" if I can get there too.
bousozoku
Nov 3, 2004, 09:17 AM
About ram... 512 is ok. about adding more ram.... well if with the engine of a BMW you can not scape from the police, what is so special about the price of car then?
...
If you put regular gasoline in a BMW, you're not going to get far. It won't like it and you may be able to limp along at much lower performance but it won't give its best.
MacBandit
Nov 3, 2004, 09:17 AM
What is PM .... ?
Power Management
monkeydo_jb
Nov 3, 2004, 09:22 AM
After Effecs is the software that runs the best still. I do not see why the G5 need water cooling and those stuff, really for thye speed I am getting I do not know why it should make so much heat.
The dual 2.0 is not water cooled.
BakedBeans
Nov 3, 2004, 10:11 AM
btw.... just for the record...fact outweighs opinion on this one...dual 2.0 are fast as hell..
Fukui
Nov 3, 2004, 10:34 AM
Power Management
Yea, did you turn the power management speed to Highest?
If its not, your gonna get maybe half the performance.
Just my experience with my 1.8 G5...
Flowbee
Nov 3, 2004, 11:07 AM
Seems like, if you need at least 1GB of RAM to get the speed to 'come out', the PM (:)) is overrated.
Regardless of how fast your computer is, if you try to work on complex video projects in Final Cut and After Effects with only 512mb of RAM, you will get slow performance.
Extra RAM will speed up the performance of ANY computer when using those apps.
mymemory
Nov 3, 2004, 01:33 PM
The dual 2.0 is not water cooled.
What?????? I thought it was a cool feature!
Any way, I just updated FCP to 4.1 and I am starting to fall in love with this thing... is going to be so hard to let her go, I still want a Dual 2.5 as a final computer.
I do not have the increase speed option because I made an image from my Powerbook to the G5 hard drive so I do not have to re install everything again.
But still, things are getting nicer, I'll keep reporting. :o
MacinDoc
Nov 3, 2004, 02:06 PM
What is PM .... ?
In the context it was used, it could mean Power Management or Power Mac.
debroglie
Nov 3, 2004, 02:10 PM
What?????? I thought it was a cool feature!
Any way, I just updated FCP to 4.1 and I am starting to fall in love with this thing... is going to be so hard to let her go, I still want a Dual 2.5 as a final computer.
I do not have the increase speed option because I made an image from my Powerbook to the G5 hard drive so I do not have to re install everything again.
But still, things are getting nicer, I'll keep reporting. :o
Go to system preferences and then Energy Saver. Then change the system optimization.
If I knew what Apple Store you were abusing like this, I would call them and alert them. You should be ashamed.
monkeydo_jb
Nov 3, 2004, 02:25 PM
I do not have the increase speed option because I made an image from my Powerbook to the G5 hard drive so I do not have to re install everything again.
I would point to this as the cause of any speed problem you may be having.
I don't have any facts in front of me, but most likely when Panther is installed
it detects what processor type you are using and installs an optimized version
of the OS for that CPU.
daveL
Nov 3, 2004, 02:29 PM
Make that 2.0 GB, you'll want to have dual dimms (interleaving) for Best performance. IIRC...
Well, actually, you have no choice but to install memory sticks in pairs in a G5. Memory is always interleaved. If he has 512 MB total, it means he has 2 x 256 MB dimms installed. He's using 2 of the 8 memory slots.
jackieonasses
Nov 3, 2004, 02:36 PM
I would point to this as the cause of any speed problem you may be having.
I don't have any facts in front of me, but most likely when Panther is installed
it detects what processor type you are using and installs an optimized version
of the OS for that CPU.That is what i was about to say, It copies specific stuff. you have a 64-bit OS and you just copied a 32-bit driver-d OS to your dual 2...
rdowns
Nov 3, 2004, 02:42 PM
What is PM .... ?
The rare significant other who suffers only one day per month. Sadly, the vast majority deal with the plural.
maxvamp
Nov 3, 2004, 02:47 PM
Originally Posted by Hoef
What is PM .... ?
Tony Blair?
Hoef
Nov 3, 2004, 05:35 PM
Power Management
A G5 has a power management feature? I thought that was the realm of laptops..
Fukui
Nov 3, 2004, 05:43 PM
A G5 has a power management feature? I thought that was the realm of laptops..
Nope. All G5s have a power management.
Set to automatic, it cycles the CPU speed based on the load, but unfortunately this is not so smooth, so you get bursts of full performance, then drops, then bursts... setting to full speed ensures max performance always.
MacBandit
Nov 4, 2004, 12:40 AM
A G5 has a power management feature? I thought that was the realm of laptops..
Nope more and more modern computers do this to keep the heat down and thus keep the fan noise down.
daggett2
Nov 4, 2004, 01:49 AM
Well, actually, you have no choice but to install memory sticks in pairs in a G5. Memory is always interleaved. If he has 512 MB total, it means he has 2 x 256 MB dimms installed. He's using 2 of the 8 memory slots.
...so, for instance if u configure with a pair of 1 GB, you should match the orig. 256MB as well? or what do u do with the widow? or does it really affect performance that much?
MacBandit
Nov 4, 2004, 09:05 AM
...so, for instance if u configure with a pair of 1 GB, you should match the orig. 256MB as well? or what do u do with the widow? or does it really affect performance that much?
There are already a pair of memory sticks in there no widows. If you have 256MB of RAM then you have a pair of 128MB memory cards in there. Dual2.0s come with 512MBs though not 256MBs so it should have a pair of 256MB cards.
Rod Rod
Nov 4, 2004, 02:58 PM
The computer is not noisy at all, the powerbooks make more noise and I just realize there is just one firewire port in the back.
There are two FireWire ports on the back. One is FW400 and the other is FW800. If you don't have a FW800 device don't worry. Just get a 9-pin to 6-pin (or even 4-pin) adapter to use that FW800 with FW400 devices at FW400 speeds.
Besides that, it was a very unwise decision to copy the (it's hard to say "your" when referring to computers you use) PowerBook's image to the Power Mac G5. Don't blame Apple for your pathetic experience, blame yourself. You've hobbled the system yourself, as jackieonassis pointed out.
Abulia
Nov 4, 2004, 03:54 PM
If I knew what Apple Store you were abusing like this, I would call them and alert them. You should be ashamed.That should be pretty easy. Presuming his profile is correct and he's actually in Miami, there are only 5 Apple stores in Florida! Give them a call and let them know about the twerp that's hosing them over! Then he'll have to pay the restocking fee! :) (Direct them to this thread as well.) ;)
The Falls
8888 S.W. 136th Street
Miami, FL 33176
(305) 234-4565
AVENTURA
19575 BISCAYNE BLVD STE 1155
AVENTURA, FL 33180
305-692-4448
BOCA RATON
6000 W GLADES RD STE 1121
BOCA RATON, FL 33431
561-338-0478
WELLINGTON GREEN
10300 W FOREST HILL BLVD
WELLINGTON, FL 33414
561-795-5630
Have fun! :D
Abulia
Nov 4, 2004, 03:58 PM
Geesh, this is too easy! Here's his own resume! :D (Source http://www.vjrei.com/)
Reinaldo Torres Resume
Mobil: (786) 389.29.73/ location: Miami.FL/ email: vjrei@yahoo.com/ www.vjrei.com
Demo reel available (24MB)
Playboy Tour 2004 Promo (14MB)
Objective: Seeking a position in video post-production as an editor and animator.
Job Description: To create visual environments for live events, multimedia and broadcast media.
General: Managing the overall production from its conception to the end, focusing in creating the immersion of the public in to the product or brand.
Production: Video and audio post-production for different kinds of media (internet, corporate, broadcast). Collaborate and manage a creative production team. Creating budgets and organizing a complete pre-production schedule is also part of the duty.
Experience:
2004
•Video Editor/ Production Manager: Human League Corporate Promo and TV spot. New York
•Video Editor: New York Fashion Week Spring 2004.
•VJ Performance: Eye Wash at Remote Lounge.
•Video Productions: Show Club New York.
2003
•Environmental Visual Multimedia Artist for: Polar Ice (Fiesta Ice), Boogie Nights Special (JB).
•Visual Artist for different bands as: Gaelica, O1 and Diva Gash.
•Co-Producer in independent events: Amnesia Ibiza - Venezuela, Reactif Party II.
•Video Post Production and Direction: Lucky Strike Promo, Reactif Party Promo.
2002
•Environmental Visual Multimedia Artist: Boogie Nights Special, Frequency Party, Unity III, Fashion Nights Magazine, Play Magazine, ONG Acción Solidaria Contra el Sida, Reactif I.
•Clubs: Living Room Lounge, Buddha Tronic, Fusion, Maxims, Santa La Diabla.
•A total of 33 presentations during the year.
2001
•Web Producer/ Graphic Designer: TTR.com.
•Web Producer: Artesania Virtual.
•Web Executive Producer/ Editor: www.tuinstrumento.net.
•Multimedia Assessor: eClubs Worldwide Telecom.
2000
•Audio Engineer/ Music Producer: TV show "Así es el rollo".
•Pensum Collaborator Sound Designer and Instructor: Centro de Diseño Digital Multimedia Institute.
•Multimedia Producer for: Johnson & Johnson de Venezuela.
•Musician in my personal album: "El rollo infinito de Venezuela" Los Frijolitos/ Genre: Techno
1999
•Music Producer/ Video Editor: Good Idea Productions.
•General Producer/ Musician: Spectra Seriea (corporate).
•Sound Designer: "Ruge Mania" TV Show.
Prior
•Cast and model for several tv commercials: Fiat Premio, Círculo de lectores, Corn Flakes, Heins Soya Sauce, Oreo Big Stuff, Frosty Milk Shake, Kentucky Fried Chicken, Cliclets Adams “Bobaloo”, Banco Central de Venezuela.
•Collaboration as a producer, musician and engineer for several rock and electronic bands.
•Musician in the album: "El Viaje de una vida" Claroscuro Band/ Genre: electro-latin rock.
•Keyboard player for the band “El Exilio”.
Software:
Video: Final Cut Pro, After Effects.
Audio: Protools, Digital Performer.
Publishing: Photoshop, Illustrator.
Web: Flash MX, Dreamweaver.
Utilities: Norton, Toast, Media Cleaner.
Others: Excel, Word, Arkaos, Motion Dive, Videodelic, iDVD and others.
Education:
Full Sail Center For Recording Arts: Multimedia Associate in Science/ 1998/ Orlando, FL.
TAS: Audio Engineer Degree/ 1996/ Caracas, Venezuela.
Curses:
Universidad Central de Venezuela: Corporate Managment, 6 months, 2002.
Centro de Diseño Digital: Web Design, 3 weeks, 1999.
Electronic Music Production: Remo Ciarletta/ Miguel Angel Noya: 1995-1997.
Roland Learning Center: Music and keyboard, 1989-1992
Insight Seminars: 1988-1992
Languages:
Spanish/ English spoken.
debroglie
Nov 4, 2004, 04:49 PM
Curses:
Universidad Central de Venezuela: Corporate Managment, 6 months, 2002.
Centro de Diseño Digital: Web Design, 3 weeks, 1999.
Electronic Music Production: Remo Ciarletta/ Miguel Angel Noya: 1995-1997.
Roland Learning Center: Music and keyboard, 1989-1992
Insight Seminars: 1988-1992
hahaha, curses
bousozoku
Nov 4, 2004, 05:01 PM
We shouldn't forget a photo: http://forums.macrumors.com/attachment.php?attachmentid=16012 :D
bousozoku
Nov 6, 2004, 01:57 AM
...
Go to Bluckbusters and rent Don Juan de Marco... that was my life back in Venezulea, passion, romance and things like that
...
As I remember it, the movie was about a psychiatric patient who was having delusions.
MacBandit
Nov 6, 2004, 08:53 AM
As I remember it, the movie was about a psychiatric patient who was having delusions.
Actually they left it hanging so that you think it might have been true but also it might have been delusions. It's a really good plot IMO.
wrc fan
Nov 7, 2004, 03:44 AM
That is what i was about to say, It copies specific stuff. you have a 64-bit OS and you just copied a 32-bit driver-d OS to your dual 2...
10.3 is not 64 bit, except for the memory system (so it can access more than 4GB). Anyway, I cloned my install from my G4 Cube to my G5, and it runs just fine, the power management is all there. There is no slow down.
And just to show the speed improvement of the G5 over a G4 powerbook, I use a program I made, mbencher (http://mbencher.ilnm.com), that just encodes video into divx (which is one of the things I do most often on my computers). A 1.5GHz G4 PowerBook got 27 frames per second. My dual 2GHz G5 (with stock ram) got 90 frames per second. I'd say the G5 has a big speed improvement over the G4.
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