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mackage

macrumors 6502
Apr 6, 2011
274
3
They don't. Memory is directly connected to the processors and not via FSB. DMI i think it's called for Sandy Bridge whilst Arrandale used QPI

Support for 1600MHz might come down to whether Sandy Bridge mobile architecture supports it (it does). If so, then that feature likely carries over into the 2011 MBPs

Someone needs to call intel tech.
 

iMackPro

macrumors 6502
Mar 31, 2011
333
0
what does 16000Mhz mean for the avg user?

is this something you will notice only when you run your computer at 99% load or will people notice it when launching apps and other daily tasks?
 

daneoni

macrumors G4
Mar 24, 2006
11,575
1,131
what does 16000Mhz mean for the avg user?

is this something you will notice only when you run your computer at 99% load or will people notice it when launching apps and other daily tasks?

In the real world the difference is minimal.

...finding games and applications that make effective use of the extra memory bandwidth and faster access latencies can be difficult.
 

Hackintosh Sr.

macrumors regular
Original poster
Dec 11, 2008
228
60
Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8G4 Safari/6533.18.5)

I needed 8gb and although the performance might be minimal, I thought I would give the 1600 sticks a try since they weren't really too much more expensive than the 1333 ones. Hope this helps some people wondering if it will work with 1600.
 

Hackintosh Sr.

macrumors regular
Original poster
Dec 11, 2008
228
60
Hmm this is very interesting. Nice... too bad I just bought some 1333Mhz ram.

Also to note, if I remember correctly, only the 2.2 and 2.3 i7 support 1600Mhz ram while the 2.0 2630qm does not. Feel free to correct me if I am mistaken.

OP, can you go to your system profiler and go to the memory slot. And double check it reads as speed: 1600Mhz thank you.

Yes, it says 1600 for both sticks.
 

Hackintosh Sr.

macrumors regular
Original poster
Dec 11, 2008
228
60
I think it is also worth noting that I bought the part number

KHX1600C9S3K2/8G

Not the KHX1600C9S3K2/8GX. I believe these might not work - not 100% sure

Just wanted to document that before someone buys the other part number and is pissed off. They both are 1600mhz ram but the GX part you might have to enable XMP (Extreme Memory Profiles) to get it to work - which us mac users cant do.
 

Hackintosh Sr.

macrumors regular
Original poster
Dec 11, 2008
228
60
But does it give any benefit?

Not too sure. I have a new vertex 3 in and it SCREAMS. It is hard to tell. Can someone post some stock geekbench scores or whatever test we can compare? My machine does bench slower than others that I have seen before any upgrades though. I think I got a slower machine out of the laptops :p oh well we can try and compare
 

SpitUK

macrumors 6502a
Mar 5, 2010
847
731
East Yorkshire, UK
Which MBP have you got?

I am going to swap my iMac for the 2.3 17" MBP with 240Gb Vertex 3 and 8Gb. It will be my main computer. The power in these new MBP's are amazing. Would be awesome to have that sort of performance in a portable form factor.
 

lavrishevo

macrumors 68000
Jan 9, 2007
1,864
204
NJ
Not too sure. I have a new vertex 3 in and it SCREAMS. It is hard to tell. Can someone post some stock geekbench scores or whatever test we can compare? My machine does bench slower than others that I have seen before any upgrades though. I think I got a slower machine out of the laptops :p oh well we can try and compare

Here is my memory rating in Geek Bench 32bit mode. 8 GB of Crucial @ 1333. Yours appears to be a bit faster.

 
Last edited:

Macsavvytech

macrumors 6502a
May 25, 2010
897
0
OP, what brand are the RAM you got, some 1600Mhz RAM would make a nice addition to my computer :)
 

SpitUK

macrumors 6502a
Mar 5, 2010
847
731
East Yorkshire, UK
Interesting scores. It certainly looks like the 1600 is being taken advantage of!

Will be buying 8gb soon, certainly persuaded me. Just got to find it in the UK.
 

lavrishevo

macrumors 68000
Jan 9, 2007
1,864
204
NJ
This is good news if it turns out to be the case. The only thing that concerns me is if running the Vertex 3 is affecting the scores. Given it is a ram test but it is testing ram by reading information off the hard drive and if the hard drive is supplying the ram with data much faster then the scores would be higher. I am still running the stock 5400 speed drive at this point.

What we need is someone else with the Vertex 3 to also perform this test in 32bit mode running 1333 MHz ram.
 

Dwalls90

macrumors 603
Feb 5, 2009
5,426
4,391
I'm on 10.7 DP2 and only scored 5600 with G.Skill 8Gb ... I attribute that to the beta nature of 10.7, and I believe my mac was backing up at the time... will have to report back.
 

circularforward

macrumors 6502
Jul 18, 2010
253
0
I think it is also worth noting that I bought the part number

KHX1600C9S3K2/8G

Not the KHX1600C9S3K2/8GX. I believe these might not work - not 100% sure

Just wanted to document that before someone buys the other part number and is pissed off. They both are 1600mhz ram but the GX part you might have to enable XMP (Extreme Memory Profiles) to get it to work - which us mac users cant do.

In my 2011 2.2 15", I am using the 8GX ram as I got it for a good deal. It shows as 1333. =(
 

SilverOnemi

macrumors member
Sep 22, 2008
69
0
well i don't think the performance difference will be night an day, that said, i think it'll be slightly higher but it'll be really hard to see.

i'm looking forward to see how this turns out.
 

endless17

macrumors member
Mar 8, 2011
96
1
congrats, but you'll notice little, if any, real-world difference between 1066, 1333 and 1600 spec-ced RAM.
 

AppleScruff1

macrumors G4
Feb 10, 2011
10,026
2,949
congrats, but you'll notice little, if any, real-world difference between 1066, 1333 and 1600 spec-ced RAM.

You are quite correct.


In a Windows based pc, the RAM speed is also governed by the motherboard and BIOS setup. Some boards allow the RAM to be overclocked. If you want to read more than you will ever want to know about RAM and overclocking in general, check out overclock.net. You will find that overclocking RAM gives only a small improvement in overclocking cpu's.
 

Macsavvytech

macrumors 6502a
May 25, 2010
897
0
I found a quite cheap kit for $125 so, I have decided after seeing this that even if the difference is very very small, for an extra ~$35 its all good, 8GB that is.
 

kappaknight

macrumors 68000
Mar 5, 2009
1,595
91
Atlanta, GA
congrats, but you'll notice little, if any, real-world difference between 1066, 1333 and 1600 spec-ced RAM.

I honestly have not noticed a difference with my current 1333 RAM vs. my old 1066 RAM or 800Mhz RAM from earlier MBP's.

Though, I wonder if higher speed RAM would help with the SSD beach balling issue.

/ Yes, I don't know what I'm talking about. =)

/ No, I don't know exactly where the hiccup is. =P
 
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