View Full Version : 2.8E prescott voltages? bios settings?
10-15-04, 08:54 PM
I have Oced my 2.8E Prescott to 3.178 and my goal is 3.4 I was at around 3.06 and I couldn't get anymore out of my 350W PS so I got a TruePower 430 W and I was able to get up to 3.17 with 227 FSB. My VCORE voltage is on auto and is at 1.424v. My temps are good, the CPU idles at 34c. My DDR voltage is at 2.85 and my AGP is at 2.70 volts. I changed my mem from 2.5 4 4 8 8 to 2.5 3 3 6 8. I'm new to this so I don't really understand the mem settings but it sems to be working.
When I try and up the FSB to 228, the computer boots but my monitor goes to sleep because there's no signal, it's like my video card is not putting out anything. Have any ideas about what I could do, you guys got me this far. Thanks a bunch.
10-16-04, 08:31 AM
RangerXLT8, try a 5:4 divider on your memory
With a FSB of 228mhz you are running your DDR400 memory at 456mhz
Some memory can handle this high of an overclock and others cannot
Also you do have the agp/pci bus locked at 33/66 right?
10-16-04, 02:55 PM
I might sound stupid to you guys but how to I set my mem to a 5:4 divider. My stock settings are 2.5 4 4 8 8. Thanks Dave appreciate the help. Also dave what voltage is your cpu at?
One more thing, when I run 3dmark 03 on the sound test, my system frezzes but the sounds keeps stuttering, I do have a SB KLive 5.1 card and I read somewhere that these cards can make your system unstable. After I play Doom 3 for about a half hour, the same thing happens, my system locks up and the sound just keeps stuttering.
10-16-04, 06:57 PM
I might sound stupid to you guys but how to I set my mem to a 5:4 divider.
No Question is stupid, that is how we all learned
Set your memory to 333 , this will give you the 5:4 divider
Also dave what voltage is your cpu at?
Be careful with this one. the prescott employs what is called " Dynamic VID" which throttles the Vcore up and down according to load. The reason why this is dangerous is because you could set the Vcore at the high limit of the chip and this Dynamic VID could raise ithe VCore and push your chip over the edge
You can read about this here
Dynamic VID (http://www.iamnotageek.com/a/8-p1.php)
are you watching your temps? Prescotts run hot :mad:
MSI chose to lock the Vcore on some of their boards because of this
Prescott Dangerous Tweaks (http://www.hardocp.com/article.html?art=NTg5)
I have been able to get 3.59 at the stock vcore
One more thing, when I run 3dmark 03 on the sound test, my system frezzes but the sounds keeps stuttering,
Do you have the PCI/AGP bus locked at 33/66?
I'm going to assume you meant 1.7 on that agp voltage, and even that is high for a 9600. More volts to the agp is supposed to stabalize the NB, but i haven't tested that out myself. Lock agp/pci, try a 5:4 divider as suggested. And lock your vcore at 1.45 or higher (not auto), not to exceed 1.5 actual. Ussually the first reason for system reboot is not enough volts at the CPU, at least in my computers...
10-16-04, 09:49 PM
I appreciate the help guys, my DDR is Corsair XMS 3200 so I dropped it from 400 to 320 but the OC(FSB at 219) makes it 350.04 with a 5/4 divider. I locked my pci\agp bus at 33\66. I'm going to set my vcore at 1.45 and then I'm gonna play some Doom 3 and see if it is stable. I'm gonna drop my vagp to 1.6 and see what happens. I'll get back witht he results.
10-16-04, 10:35 PM
Ranger , one thing I forgot to mention is to set your memory voltage to 2.7 or 2.8 ( whichever is the lowest that the system will run stable )
If you chose to bump the Vcore ( I would not) watch the heat!! :mad:
Good luck and keep us posted
Dcasole brings up a good point, upping that vcore will add heat, and stress your mobo/PSU/CPU a lot more, but so long as you stay below 1.5 actual, and have decent cooling, you should be ok. I run my pressy at 1.5125 or whatever it is on an Abit board, and my actual is more around 1.49ish. Thing does run hotter than a mother though. Good luck.
10-16-04, 11:41 PM
:D Well I set my Vcore to 1.45 but in cpu-z it's actually 1.488. My DDR is set at 320 with a FSB of 219 making the DDR run at 350mhz. My temps look good, idle 38 and load 54. My Vagp is at 1.6. I have a TruePower 430 PSU so I have enough power. I ran prime95 and 3dmark03 for about an hour and then I played Doom 3 for about an hour. My goal is a stable 3.2 so I still have alot of work to do.
Sounds like just a poor overclocker to me, but good luck, hope you hit that mark.
10-17-04, 03:28 PM
Well I OC to 3.219 last night and ran prime95 all night long last night and it's still going now. Seems to be stable. The problem was the DDR. I had it set to 400 and with the FSB turned up it was running at around 450. So after I turned it down to 320, set the Vcore at 1.45, 3.06 ran perfect so I slowly made my way up to 3.219 and it ran prime95 all night long. My temps are good, idle is 37c and under full load 54c. In conclusion I just had the bios settings all messed up and that was keeping me from a good OC.
10-17-04, 06:11 PM
Make sure you have "Spread Spectrum" disabled also as this will limit your overclock
10-17-04, 09:28 PM
I lowered my vcore from 1.45 to 1.425 and all seems well. I'm at 3.2 now so I'm happy but I might try and go up to 3.4 after I mod my case--I'm going to put a Vantec Stealth 80mm case fan in the side of my case right over the CPU to get more outside air in the case.
Thanks for all the help.
vBulletin® v3.8.7, Copyright ©2000-2013, vBulletin Solutions, Inc.