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Is it safe to whack my P4 upto 1.85volts?

S

snow patrol

Diamond Member
I've got myself a TH7 II raid and a 2.2Ghz P4. I've downloaded a BIOS which now gives me a max voltage of 1.85. At the moment I'm at 117x22 at 1.65V. Load temp is about 50c, although I haven't got all my case fans on at the moment.

I want to shoot for 2.75Ghz but I think I'll need to go all the way in terms of voltage. Is this safe? What's the max temp I should look at for under load?

Also, I think I'll have to run my RAM at 3x instead of 4x. So that begs the question - would I be better of running at 2600mhz with the RAM at 4x or at ~2800mhz with the ram at 3x...?? I've got Samsung PC800. Can the TH7 II take PC1066, maybe I could swap it out?

thanks 🙂
 
Well, this is my opinion; If you have good cooling in the case and on the cpu, go for it. What hsf you using btw? I would run at 2600 with 4x becasue it gets more performance interm of memory bandwitd.
 
It won't be a problem with good air cooling try 1.825cpuv instead , as long as load stays under 56-58c . As far as it shortening the life of the cpu at 1.75 -1.85v I wouldn't worry about it the p4 will be long obsolete by the time that happens.
 
If you like your CPU: Dont even consider it.

$hit that is so wrong to say, its all about keeping things cool. Im running my P41.6a at 1.9volts My temps NEVER get above 50c the last 10 cpu I have had were all running at way high voltage and they are all stilling running. So dont worry about it snow partol, just dont let it get 2 hot.
 
Just make sure you cool it well, and monitor the temps, I am running my 2.2a @ 3036 as we speak, but I am water cooling, Thing is, depends on the actual board, and the "Boot Voltage". The Asus P4t533-c, will give you 1.61 to 1.63v with the overvolt jumper enabled, However, this isn't enuff to get you to a High OC. I did the pin wrap for a default of 1.8v today, and am able to run higher now. Hope this helps.
 
thanks guys. I'm wanting to keep the RAM at 4X. At the moment I'm at 2.61Ghz (118x22) and 1.7V. Load temp about 48C. I've only got a coolermaster silent heatpipe thing, so it's not THAT meaty. It's a shame i can't change the fan on it (it's a 70mm fan 🙁 )

One thing i've noticed that sandra is showing my 12v line as being 11.75 or so. I've got a sparkle 400w...is it worth trying to adjust the pots?
 
Originally posted by: Renob
If you like your CPU: Dont even consider it.

$hit that is so wrong to say, its all about keeping things cool. Im running my P41.6a at 1.9volts My temps NEVER get above 50c the last 10 cpu I have had were all running at way high voltage and they are all stilling running. So dont worry about it snow partol, just dont let it get 2 hot.
Click to expand...


No, it's not wrong. The poster is just advising caution. Just because your temperatures are low doesn't mean the CPU isn't suffering damage through overvolting. There is risk involved as the damage is not linear - but rather exponential - as the voltage goes up.

This has been discussed in the past numerous times. A "search" of the archives will probably turn up the discussions.

That said - now that you realize there ARE risks - you have to weigh the (7 year non-O/C'd) expected life of the CPU with it's USEFUL life (to you).
 
Why do want to increase your voltage? Is the system unstable?

In my experience the only benefits of upping the voltage is to make an oc'd system stable.
 
I stand corected. After further research I have read of people killing their p4 at 1.8 and abouve volts. I have now turned my cpu down to 1.75 and my fsb down to 150 for a 2400mhz cpu.



 
I've had three TH7's and all three undervolted by about 0.1 volts when using Northwood cpus regardless of the bios used. My current system reads about 1.77 volts in MBM and Sandra when set to 1.85 in the bios (Mr. Natural's 39c). I wouldn't expect that you would have any noticeable longevity problems running your PIV at a bios voltage setting of 1.85v.
 
TH7s are severly undervolted when using Northys im POSITIVE of it, when im set to 1.7v i get about 1.57 with a 550w Enermax, OR a 550w Antec Truepower with the pots CRANKED (12v rail@12.75)

The DRCG (Direct Rambus Clock Generators) on the TH7-II arent certified to go over that, some people (including me) can't run Certified 1066 rambus @ 1066, my limit was a 117fsb with the X4 multi (PC936)

You will need I850E with certified 1066 DRCGs to garuntee 1066 operation, thats why all these people with RDRAM have had trouble overclocking. The only motherboard i know of with the correct DRCGs is the Asus P4T533-C it is certified for 1066 operation, and doesnt have the northwood undervolt problem. My 2.0a would only go to 2.45 with the old mobo, im gonna run it in a P4B266 and check it out soon. Hopeing for 2666@1.7v, also the MrNatural BIOS you are using has some cold boot issues when using the PCIFIX command in the TH7-II bios 😎
 
I will atest the voltage theory....I was running a p4 1.8 @ 2.4ghz 1.65v for a month fine...then I tried to raise it up to 12.52ghz with 1.775v in bios for 1.83v actual on asus board (it overvolted a bit) and it lasted a week and I started getting a slow "diminishing returns" like attitude from the cpu...It would first only do 2.4ghz then a week later it wouldn'
t even do that...eventaully it bottomed out at 2.25ghz and 1.55v for 10 weeks where it ran last time I ran it...I replaced eveything in my system thinking it was something else...finally got a new 1.6 put it in old system ran fine at high fsb once again...

The temps!!!! Asus pcprobe never showed more then 52c high after hours of prime, 3dmark, or divx encoding....

temps are not the soul damaging factor...overvolting leads to electromigration, and it is real folks!!! Stop listening to all the self-proclaimed experts. If they have no background in the semiconductor business or electrical engineering or testing don't listen to them....Look for articles and links provided by PM (intel engineer)...

I personally will not go over 1.7v again....Keep temps at low 50's max but realize some boards are having problems reporting accurate temps there as well...f^cking morons, intel gave them a simple temperature to read but they can find away to screw anything up....Same chip in my asus mobo with all same components will run 4-5c cooler idle...go figure!!!

 
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