a64 w/platinum rev 2.0

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wadec22

2[H]4U
2FA
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Jul 26, 2005
Messages
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Well after spending the ENTIRE day with my new build here is what I've found along with a couple general questions. My rig will run at 2.4ghz, rock solid stable with very nice temps. I use the 10x multiplier, the RAM is running at 1:1, had to increase voltage to 3.0 and change timings to 3-4-4-8. My system will boot and run at 2.5 but fails prime 95 after about 1 minute. I tried bumping the memory voltage up to 3.2v and things get better.... 4 minute failure. If I give the proc anymore than 1.56v it runs VERY hot. I actually even got the system to boot @ 2.6ghz today. The limitation does not seem to be my processor, it appears to be the RAM. For some reason the system really does not agree well with memory dividers. Everytime I use them it becomes unstable. The best it does at 2.5 is if I give the memory 3.2v and relax timings to 3-4-4-8. Even if I relax the timings to 3-5-5-10, the system actually gets worse. If I change a jumper on the mobo I can up the voltage to the memory more. My DFI will actually give up to 4v I think. Should I give the memory anymore than 3.2v? Any help would be appreciated guys. Here is my rig:

DFI n4 Ultra D
3200 Winchester
2x512mb OCZ Platinum Rev 2 3200
PCP&C 510 Deluxe SLI power supply
BFG 7800gt (460core, 1200ram)
All on plenty of air cooling
 
I think the guys at dfi street recommend 3.2 - 3.3v for that ram. You might want to check out their forum for more specifics.
 
Plat Rev 2 is TCC5/TCCD and is pretty "fragile" when it comes to voltage. I know the OCZ guys recommend no higher than 3.0V. I dont know if the chips would die instantly, but Id try to keep it as low as possible. Also might want to make sure you get air flowing around the modules.

Others have found that the memory responds better with *lower* voltage. I have mine running at 2.8V, and I was able to run it 1:1 at 285 as long as I backed down to 2T (have you tried that? Prime95 was unstable for me until I disabled Command Per Clock, and the Everest mem bandwidth loss was neglible). However I was able to get a better CPU OC out of it on a 9/10 divider, which still puts the RAM at ddr512. Once my CPU oc was set I havent tried backing down the mem voltage to see if I can run it lower than 2.8. 2.8 seems to be the most common voltage level used with this RAM from the guys on the DFI and OCZ boards.

-Chris
 
Do not go above 3V with TCCD/TCC5! I have your exact same ram, and all I need is 2.7V to do 2.5-3-3-7 270 1T! TCCD/TCC5 runs HOT, and I can't believe you're pumping 3.2V through it. You're probably noticing a degredation in performance becaiuse of the high voltage. I'm personally amazed your RAM didn't fry.
 
Wow! I must have noob-proof modules! lol. 2T seems to have solved my problems. I am still testing for max stability, but in general looks like I'm fine at 2.7 volts now. Mem dividers are working now too. I will post specs when I have prime95 stability. Thanks guys!
 
Well I'm finally done testing. My proc will run at 2,450ghz. Using 10x, 240HTT, 1.525v, 2.6v mem, 150 mem divider (204mhz, DDR 408), 2-3-2-5 mem timings. Kind of disappointed. Proc SEEMS perfectly stable at 2,500 but fails prime 95 after 18min. Even played cs for around 20 minutes no problems. Just wanna make sure its stable so I went back down to 2,450. Still a 20+% overclock I guess. Oh, btw, went back to 1T.
 
Something doesn't sound quite right... I can get my Rev. 2 up to 245mhz at 2.5-3-3-8 without using a divider. Maybe loosen up your timings? Unless ofcourse you're dividing for better timings, in which case I'm just an idiot.

wadec22 said:
Well I'm finally done testing. My proc will run at 2,450ghz. Using 10x, 240HTT, 1.525v, 2.6v mem, 150 mem divider (204mhz, DDR 408), 2-3-2-5 mem timings. Kind of disappointed. Proc SEEMS perfectly stable at 2,500 but fails prime 95 after 18min. Even played cs for around 20 minutes no problems. Just wanna make sure its stable so I went back down to 2,450. Still a 20+% overclock I guess. Oh, btw, went back to 1T.
Click to expand...
 
My RAM is extemely picky with timings. No matter what I set them to I cannot seem to get it ABSOLUTELY prime 95 stable. Is there any real performance gain by running 1:1 with looser timings? Should be about the same as running at tighter timings with divider shouldn't it? In any case, I do agree, something is not right. My frickin RAM is PICKY!
 
try to up ur voltage to 2.65v and try again...if not, try 2.7v...the max voltage iw ould give it is 2.9v...just keep tryin, TCCD has a tendency to have a sweet spot...once u find it, ull have some fun ;)
 
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