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eMac 800Mhz -> 1.33GHz conversion
- Thread starter lbodnar
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130's-140's. it's on their comparison site under DaMac. processor speed alone i get in the 190sOziMac said:
yeah, that's how they made the 1.25ghz stocks.mikeyredk said:
edit-and gave it another 256k L2 cache, which is why the xbench scores on the 1.25's are rather good.
that and i don't know where the FSB jumpers aremkaake said:
and what their settings would need to be no ignorance at all my friend, i should have worded it better. Apple increased the L2 cache from 256k on the 800 and 1ghz stock machines, to 512k on the 1.25's. but considering from the processor standpoint, i'm almost hitting a 200 in xbench, i think i'm happy with the 1.6 at 133fsb. changing the fsb jumpers, with my luck, would kill my computer, plus i would have to change the cooling system. and doing another solder job to jump from 12x to 13x multiplier, in my eyes, isn't worth the risk of killing it for another 133mhzOziMac said:
edit- ha, you must have just done your edit, so i'll do mine now
Hello
Long time follower of this thread, first time poster.
Inspired by leo, I did a HD mod on my 1ghz eMac and everything went wonderfully - now running 120gig. The take-apart and re-assembly was enough to make me comfortable to do it again, complex in progress, but incredibly simple in retrospect
The question of 'to clock or not to clock' has been going over in my mind since leo first did the mod - and now I think I'm up for it.
I have one simple question (I think this may have been mentioned before, but I can't seem to find or recall where/if it was mentioned) - after changing the multiplier configuration, do you need to press the PMU reset switch?
This is all off the top of my head - I don't remember if I dreamt it and read it. I have a feeling something about this is mentioned in the eMac disassembly docs, something about battery life going from years down to days (if not done, or done too much)*.
Can anyone clear this up?
Thanks
PS. Eager to hear more about the 1.6+ stability etc.
* Chief Wiggum: "And if your nose bleeds, you're picking it too much.. or.. not enough."
Long time follower of this thread, first time poster.
Inspired by leo, I did a HD mod on my 1ghz eMac and everything went wonderfully - now running 120gig. The take-apart and re-assembly was enough to make me comfortable to do it again, complex in progress, but incredibly simple in retrospect
The question of 'to clock or not to clock' has been going over in my mind since leo first did the mod - and now I think I'm up for it.
I have one simple question (I think this may have been mentioned before, but I can't seem to find or recall where/if it was mentioned) - after changing the multiplier configuration, do you need to press the PMU reset switch?
This is all off the top of my head - I don't remember if I dreamt it and read it. I have a feeling something about this is mentioned in the eMac disassembly docs, something about battery life going from years down to days (if not done, or done too much)*.
Can anyone clear this up?
Thanks
PS. Eager to hear more about the 1.6+ stability etc.
* Chief Wiggum: "And if your nose bleeds, you're picking it too much.. or.. not enough."
I didn't discharge the CRT.
Keep your Mac shut down for a while* and hopefully** the voltages will dissipate.
I shut mine down for about an hour and made sure I didn't go near anything monitor-wise - doesn't sound so professional but I am (and the eMac are) still okay
* I've heard different reports of how long you should leave it shut down and unplugged. ** If my memory serves me correctly, Leo says something along the lines of "switch it off for 30 minutes or so to let the high voltages dissipate" and I've read in other places that you should shut down for 24 hours.
Keep your Mac shut down for a while* and hopefully** the voltages will dissipate.
I shut mine down for about an hour and made sure I didn't go near anything monitor-wise - doesn't sound so professional but I am (and the eMac are) still okay
* I've heard different reports of how long you should leave it shut down and unplugged. ** If my memory serves me correctly, Leo says something along the lines of "switch it off for 30 minutes or so to let the high voltages dissipate" and I've read in other places that you should shut down for 24 hours.
i didn't discharge the CRT either, and i completely forgot to wait. Some CRT's, like TV's, can hold the charge for 20years+. It was really easy to get to the jumpers too, just take the optical drive out, and they're right under.mikeyredk said:just one question i was looking at the apple take apart guide *don't ask how i got it
how did you discharge the tube display? if you didn't how did you get at the logic board?
As for the other guy asking about the stability of my eMac running at 1.6, it's been great. Most apps open close to instantly, simple things like textedit and terminal are up before you can even let go of the button. I still want to take the fsb to 167, but then i'd be at 2.0ghz, and have to buy new memory, and probably a better cooling system
problem is, is that the pc133 won't run in the 167 environment. computer powers on, beeps a few times saying there's no working memory, and then powers off.Hector said:
wernerru said:
Very cool to hear!
How long do you keep it running and running at 100% CPU usage?
Basically my eMac never stops working - I never shut it down and I never let it sleep ( in fact I make it work while I sleep
). This is my only concern. I think Leo said he has kept his running for over half a year and he hasn't had any problems.Did you press the PMU switch after touching the motherboard?
It's been up 24/7 since i did the clock, and the first few days i had it running at 100% in a warm room. The temperature coming out of the fan hardly rose since the clock, i'm still considering putting a speed controller on it so it'll be quieter. I didn't push the PMU switch, but when i booted it said my time and date were off, so i shut down and pushed it, for fear of killing the battery life down to a few days. Other than that, no hitchesSEN said:Very cool to hear!
How long do you keep it running and running at 100% CPU usage?
Did you press the PMU switch after touching the motherboard?
You can see/press the PMU reset button under the memory access door on the bottom. When you have it apart to do the clock, it's on the upper right, above the optical drive mounting. After you get done doing whatever you're going to do on the mobo, just press it, and then put it back together. just don't press it twice in a row!OziMac said:
Phew!
What a tense, emotional ride that was
Just did the clock!
Maybe a little greedy to start with, but I was inspired by wernerru - not greedy enough to go with 1.6ghz mind you - but I tried a 11x clock, taking me from 1ghz to 1.467ghz. (Actually I was contemplating a 2ghz clock by prizing off one jumper, but that seemed too much). Going to 1.467 was going to be an easy mod, prizing off two jumpers to make a -++--- configuration.
Well, after the initial excitement, it didn't boot - and to increase the stress levels it beeped at me 4 or 5 times (not good, according to the service manuals).
Next I tried making one connection to take it to 1.4ghz. Still no boot. I was convinced I had fried something. I checked my shabby soldering and thought I had some "hair-line" connections happening. Either that or my heavy-handed prizing off of jumpers had severed something on the motherboard. So I stupidly started scratching and resoldering. Nothing.
Then, prized off another jumper to make it 1.33ghz. And bam! A picture!
Only thing was that it was a little unstable - I started trying to do things like convert video and got some really bad artifacts happening. The whole computer would lock up after 5-10 mins, not even under heavy load.
So, I pulled it back to 1.2 and everything worked fine. Then soldered one jumper to make it 1.27 - and here i am. I think this is the peak for my machine. The sad situation is that I could have saved myself a lot of inconvenience by prizing off the other two jumpers in the beginning (taking me straight to 1.27 using the surface mounted resistors, not solder). Oh well, I would have been living in perpetual wondrance, itching to know if I could run it faster.
Hasn't crashed yet - I thought I had some funny business going on, but I think it was down to me launching every single application I could find (all at once!). I'm happy with this speed
Leo, you are a king among men
What a tense, emotional ride that was
Just did the clock!
Maybe a little greedy to start with, but I was inspired by wernerru - not greedy enough to go with 1.6ghz mind you - but I tried a 11x clock, taking me from 1ghz to 1.467ghz. (Actually I was contemplating a 2ghz clock by prizing off one jumper, but that seemed too much
). Going to 1.467 was going to be an easy mod, prizing off two jumpers to make a -++--- configuration.Well, after the initial excitement, it didn't boot - and to increase the stress levels it beeped at me 4 or 5 times (not good, according to the service manuals).
Next I tried making one connection to take it to 1.4ghz. Still no boot. I was convinced I had fried something. I checked my shabby soldering and thought I had some "hair-line" connections happening. Either that or my heavy-handed prizing off of jumpers had severed something on the motherboard. So I stupidly started scratching and resoldering. Nothing.
Then, prized off another jumper to make it 1.33ghz. And bam! A picture!
Only thing was that it was a little unstable - I started trying to do things like convert video and got some really bad artifacts happening. The whole computer would lock up after 5-10 mins, not even under heavy load.
So, I pulled it back to 1.2 and everything worked fine. Then soldered one jumper to make it 1.27 - and here i am. I think this is the peak for my machine. The sad situation is that I could have saved myself a lot of inconvenience by prizing off the other two jumpers in the beginning (taking me straight to 1.27 using the surface mounted resistors, not solder). Oh well, I would have been living in perpetual wondrance, itching to know if I could run it faster.
Hasn't crashed yet - I thought I had some funny business going on, but I think it was down to me launching every single application I could find (all at once!). I'm happy with this speed
Leo, you are a king among men
Updated sig.
Well... despite the stability and the machine working fine at 1.27ghz, I noticed that whilst doing some tests some odd things occurred.
I tried to test performance with DiVA and 3ivx converting MPEG video to QuickTime and at 1.27ghz I was getting strange artifacts occasionally.
They were infrequent enough to be disregardable, but they were definitely the result of the OC, not the codec. They looked very similar to the artifacts experienced at 1.33ghz (random blue areas, maybe a few pixels wide), but were less in count.
Pulling the machine back to 1.2ghz seems to have fixed it. Being a quality nazi, this was an important fix
Well... despite the stability and the machine working fine at 1.27ghz, I noticed that whilst doing some tests some odd things occurred.
I tried to test performance with DiVA and 3ivx converting MPEG video to QuickTime and at 1.27ghz I was getting strange artifacts occasionally.
They were infrequent enough to be disregardable, but they were definitely the result of the OC, not the codec. They looked very similar to the artifacts experienced at 1.33ghz (random blue areas, maybe a few pixels wide), but were less in count.
Pulling the machine back to 1.2ghz seems to have fixed it. Being a quality nazi, this was an important fix