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P4 Voltage Woes?

N

n64man120

2[H]4U
Joined
Jan 11, 2004
Messages
3,498
I'm overclocking my P4 2.8C and naturaly i'm trying to get most out of the chip without passing the 1.7V mark as is always recomended. The problem I'm having is that, according to MBM5 and CPUZ atleast... when the cpu is idle it runs at about 0.8V higher than the bios setting. When it goes to load i.e. HL2 or Prime95 then it drops instantly to the bios set voltage.

Should I keep my idle voltage at this 1.7V line to be safe? Or should I make my actual voltage hit around there if needed since theres not much heat output during idle anyways?

On a side note, I noticed my case/cpu temps idle are 31/34 and load its 33/44. Is this big difference normal and how much of a jump should I get when I switch from stock HSF to XP-90 with Panaflo?

Thanks,
Eric
 
you will see a temp diff going away from stock on any cpu...there engineered to be just enough.. not lets let people overclock.. on voltage... thats a hard one... how about you run folding on there and never let it be idle but 45C might be a little hard to overly beat...
 
0.3 over default is about the max I would push a Intel "C". I was able to get 3.5Ghz out of my 2.8C but it didnt seem to matter what the voltage was set at. If I set my voltage to 1.85v that still didnt allow me to OC anymore then 3.5Ghz. It seems that cooling the cpu down more did more to allowed better OCing then bumping the voltage. But since Im water cooled my max cpu temp is only 26C(load) it almost seems that they(CPU's) are thermally throttled. I would bet that if you cooled it down to the low 30's you would be able to get more out of the cpu then bumping the voltage.
system: ASUS P4C800-E, 3.2C@4.0,KHXPC4000/1G,OCZ RamBooster, 2.5,3,4,5@250 1:1, XFX 6800GT@414/1200, OCZ 520W, Promise SX4 w/256m 3X36Raptors RAID0,Plextor DVDWR, Swiftech waterblocks CPU/NB/GPU , AeroGate2 monitors temps

PS: 3.2c@4.0@1.7v runs same temps as my older 2.8C@3.5@1.65v did with same setup 26C (load), The 3.2E@3.8@1.3v Presscot ran high 40's low 50's
 
i'll look into that, my OC fails prime relativly quickly (lasts an hour at best) but i've never had any multitasking stability issues so i'm cool with it
 
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