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Headlong into a 3.8

post #1 of 9
Thread Starter 
Well, I've been at it again. I'm just never satisfied when I watch others pulling great OC's out of their 0E 3.0 prescotts and I'm not. I've been toying around with vdimm/vcore/vgpu/timings/ratios and simplay CANNOT get this mother to reach 3.8 and stay there. So, after bashing my face into a mutilated mess against this wall I'll submit to your collective wisdom.

It'll occasionally open windows for 10 seconds and crash. I'm not sure if it's a heat crash or anything else. Windows will begin to boot and it'll flash a blue screen of death saying far too much to read before it blinks out of existance and reboots.

PLEH! (Help... so you can read it from the air. [stupid joke])

vcore = 1.500
vdimm = 2.85
timings = 3-4-4-8
dimm/cpu = 1:1 (I tried a divider and it still failed to boot)
FSB = 255
My System
(13 items)
 
  
CPUMotherboardOSMonitor
3.0 Prescott P4 478 Asus P4P800-SE Windows XP Home 17" GEM LCD (crap) 
KeyboardPowerCaseMouse
Generic Ultra 500 Watt X-Connect Dynex something or other Diamondback 
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My System
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CPUMotherboardOSMonitor
3.0 Prescott P4 478 Asus P4P800-SE Windows XP Home 17" GEM LCD (crap) 
KeyboardPowerCaseMouse
Generic Ultra 500 Watt X-Connect Dynex something or other Diamondback 
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post #2 of 9
I would increase the CPU voltage (vcore) from 1.500 to perhaps 1.520, I would advise not to exceed 1.525v however.

Please make sure that your CPU temperature is within acceptable limits however before you increase it more, ~65C or less is the safe zone for a Prescott

I would also consider disabling Speed Spectrum (if not already done so) and to perhaps increase the chipset voltage one notch.
post #3 of 9
Thread Starter 
I've been toying with it as of late.

After the new Big Typhoon I've been able to pull 3.8 stable @ 55C @ 1.525vcore.

I've been told, so long as the temps are under control 1.7v is the max for Prescotts. I won't run mine anywhere beyond 60C steady under load. I'm pretty sure I could do some short run "benchmark only stability" set ups around 3.9 but I'm nervous. Right now my memory seems to be edgy since it's lightly OC'ed to 510mhz (ddr500, vdimm 2.85) but the timings are reduced.
My System
(13 items)
 
  
CPUMotherboardOSMonitor
3.0 Prescott P4 478 Asus P4P800-SE Windows XP Home 17" GEM LCD (crap) 
KeyboardPowerCaseMouse
Generic Ultra 500 Watt X-Connect Dynex something or other Diamondback 
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My System
(13 items)
 
  
CPUMotherboardOSMonitor
3.0 Prescott P4 478 Asus P4P800-SE Windows XP Home 17" GEM LCD (crap) 
KeyboardPowerCaseMouse
Generic Ultra 500 Watt X-Connect Dynex something or other Diamondback 
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post #4 of 9
1.55 is the max for a Prescott to be honest
1.7v is the max for a Northwood not a Prescott, 1.7 would most likely kill a Prescott unless it is on phase change or an equivalent.
post #5 of 9
Maybe a little off topic, but I've had my p4 2.6gig northwood at 1.8v for over a year. For the past two months, I've had it at 1.9v... I'm waiting for something to go wrong, but it's stable (although the temp under load gets up to 60C, normally keep it under 55)... I actually just scored a 3908 on 3dmark05. Not too shabby...
My System
(13 items)
 
  
CPUMotherboardOSMonitor
P4 2.6 Northwood @ 3.125 Abit IC-7 Max II Win XP PRO Sceptre 19"LCD Komodo II 
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Logitech LX700 450 W Cooler Master Asphire, sweet look Logitech LX700 
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CPUMotherboardOSMonitor
P4 2.6 Northwood @ 3.125 Abit IC-7 Max II Win XP PRO Sceptre 19"LCD Komodo II 
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Logitech LX700 450 W Cooler Master Asphire, sweet look Logitech LX700 
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post #6 of 9
Quote:
Originally Posted by Unforgiven
Maybe a little off topic, but I've had my p4 2.6gig northwood at 1.8v for over a year. For the past two months, I've had it at 1.9v... I'm waiting for something to go wrong, but it's stable (although the temp under load gets up to 60C, normally keep it under 55)... I actually just scored a 3908 on 3dmark05. Not too shabby...

max temps are 55... youre going to kill that thing.
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Pentium D pressler 920 asus p5ld2 win XP nec 17in. lcd 
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wavey Antec truepower 2 550w thermaltake soprano wireless tracball 
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My System
(13 items)
 
  
CPUMotherboardOSMonitor
Pentium D pressler 920 asus p5ld2 win XP nec 17in. lcd 
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wavey Antec truepower 2 550w thermaltake soprano wireless tracball 
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post #7 of 9
try your memory at 2.5-3-3-8 as i believe those are stock number for your ram...i had issues staying stable until i put the ram to stock...
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E6600 C2D @ 3.6 P5B-D EVGA 7600GT 2GB Gskill HZ 
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post #8 of 9
Thread Starter 
I'm currently to 3.85 relatively stable.

Case door off temps at load ~52 C.
vcore 1.55
800 FSB @ 1029 (257)
3-4-4-8 timings @ 1:1

I want to hit 4.0 long enough to get into windows... I doubt it
My System
(13 items)
 
  
CPUMotherboardOSMonitor
3.0 Prescott P4 478 Asus P4P800-SE Windows XP Home 17" GEM LCD (crap) 
KeyboardPowerCaseMouse
Generic Ultra 500 Watt X-Connect Dynex something or other Diamondback 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardOSMonitor
3.0 Prescott P4 478 Asus P4P800-SE Windows XP Home 17" GEM LCD (crap) 
KeyboardPowerCaseMouse
Generic Ultra 500 Watt X-Connect Dynex something or other Diamondback 
  hide details  
Reply
post #9 of 9
Quote:
Maybe a little off topic, but I've had my p4 2.6gig northwood at 1.8v for over a year. For the past two months, I've had it at 1.9v... I'm waiting for something to go wrong, but it's stable (although the temp under load gets up to 60C, normally keep it under 55)... I actually just scored a 3908 on 3dmark05. Not too shabby...
Depends on the cooling. 1.7v is the maximum "recommended" voltage, obviously you can go over that if your CPU is cool enough. There is not really a super maximum as it depends on the evironment the system is operating in and the components in use. 1.7v is the guideline, well at least my guideline for a Northwood core processor
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