Anyone running 1.9volts on a p3?

[Syborg1211]

sorry for the caps in the title but a little excited. I overclocked to 1 ghz with 1.9 volts and 980 with 1.85 volts. The question i have is can i run 1.9 volts with an alpha pep66, 38 cfm fan, and arctic silver without burning my cpu?

could use some first hand accounts too to make me a believer

 

[MoneyMINTR]

Well, there are differing thoughts on this. BUT, I think the general consensus is that you're going to kill your chip before you know it.

Voltage is what kills. The P3 FCPGA are rated up to 80C (more like 55C in my opinion). So heat isn't that big of a deal.

-MM

 

[Syborg1211]

no problem here, running at 40 C

 

[Syborg1211]

bump


anyone running 1.9 volts on a p3 700 flip chip?

 

[Syborg1211]

i know there are some of you out there with an overclocked p3 at 1.9 volts

 

[Jen]

Thats me..........1.9 and proud. OOps 1001mhz and highest it goes is 34c in a 85F room . How is this possible you guessed water cooling

thanx
Jen

 

[Syborg1211]

thanks for answering, that's pretty good. I am going 39 C in a 85 F room at 1.85 volts. Temp didn't change for 1.9 volts, but dont know if i want to push it yet.

 

[AdamK47]

I've got my P3 650 at 1021MHz with 1.8V and a 157MHz bus with the HSDRAM at 157MHz 3-2-2. And yes... it's completly stable.

 

[Syborg1211]

what's the one 3 in your setting of 3-2-2, i forgot the order of the numbers

 

[Syborg1211]

Anyone running 1.9 volts on a p3 700?

 

[Eug]

Celeron 533A at 920, Arctic Silver, Alpha PEP66, 26 cfm fan, 1.9 V, for the last month (except the few days I ran 960 MHz :Q) at 100% load, 24/7. So it lasts a month anyway.

Interestingly, the (now recalled) PIII 1133 was shipping at 1.8 V.

I may still reduce it though, back to 1.8...

 

[AdamK47]

The first 3 means CAS-3. Next one means CAS-2. The last one is RAS to CAS delay of 2.

 

[Syborg1211]

hmmm, so tempted to go up to ghz, so so tempted

 

[ragiepew]

damn, 1.9v is a bit excessive... personally I wouldnt push it, man there isnt much of a difference between 983mhz and 100xGHz... at least not enough to justify the possibility of your chip failing. Anyway, you have to look at the long term... when the hell you going to be able to buy a new chip if this one gets fried... dont think mom and dad will spot you for another =P... anyway just my thoughts. Also, people are right... its voltage that kills your cpu... be careful.

alin

 

[Syborg1211]

well, i haven't even pushed the limits of 1.9 volts. Was too afraid to run it too long.

ragiepew- hey, christmas is coming along, i could always pop in my old cpu and wait till christmas if it fries

 

[thxturtle]

syborg,

I don't think 1.9 hurts too much. I ran my c566@952 at 1.95v for a couple of months. Never had problems with it. Just had to keep the temps down.

what sort of cooling are you using on your p3 700. I have p3 700 but I've only made a brief venture into o/c'ing (waiting on my pep66/peltier combo ... should be here tomorrow ) I can get it to post at 124mhz but I'm sure I can get it higher. I got an old PC100 micron stick in there that maxes out at 124mhz. Since I'm leaving it at default 700 for now I'd figure I'd use the extra ram till I swap the heatsink. Does Cas2 so not too shabby.

Did you ever get your DDR working at the high fsb > 124?

 

[Syborg1211]

nope, my geforce wouldn't do anything past 118 on a 2/3 agp bus ratio.

Seems like 1001 mhz seems to be the limit for 1.9 volts for the time being

 

[Jen]

Interesting.......143 bus is 95mhz on AGP i believe. And I have booted into windows at 146 bus 1022mhz .

Jen

 

[thxturtle]

syborg,

did you try the trick setting agp transfer mode to normal instead of default in the softmenu screen in the bios? It worked for me on my old p3 450 to get to 142fsb.

 

[atomicbomberman]

dude.. 1.9 is really too much.. but I'll say the absolute practical limit is 1.95.. the Coppermine core at .18 micron is rated 80C at a therolitical limit of 2.1V, but well.. that's just Theory.. I don't think they ever put that into practice. Most people only go up to 1.85, for save ocing.. after that.. you're probably hurting your chip.. I donno.. I might try 1.9 to see if my cellmine can join the Ghz Club!

 

[Syborg1211]

hmmm, all this stuff is very interesting to me. With all this, i am going to tone down to 933 at 1.75 volts and call it quits for a while and hopefully will be able to do more after a while more of burn-in.

I dont overclock much with my geforce because of its poor abilities, but when all you asked me all this stuff, i popped in my geforce and ran it at 133 bus and it ran! woohoo, finally get to utilize my great graphics card with my overclocked processor's power. Haven't tried any graphics stuff yet, maybe that will tell me if i can run this fast or not. Well, you gotta try.

 

[thxturtle]

syborg1211:

Glad to hear your geforce is working. Abit gave me some email about getting the board to work at 133mhz. by setting the video options down. Maybe you tweaked some of the settings in your bios down. If you start having instability problems with your geforce in games try turning down some of the bios settings for video. Might help.

 

[tabernack]

1.9 volts and loving it. I've been running for a month now totally stable, check it out:

http://webfors.net/850cool.htm

And running cool too.

 

[ErikaeanLogic]

Syborg1211:

The setup you've quoted is the exact one I've got in my main rig, even down to the voltages and the Arctic Silver. I also use a copper spacer to keep the PEP66 from rocking(I cut the feet off for improved contact). It's on a P3V4X. Works under load at about 40 Celsius. 15% is a safe limit for an overclocking voltage IMHO, as long as you watch the temp. Go for it!!

PS. It's a cB0 700E.

 

[Syborg1211]

hmm, maybe i should sand down the feet a little on my heatsink. Also, my 3d prophet couldn't do 3d stuff at 933 mhz with 2/3 agp bus ratio. Too bad, just too bad. Will get new motherboard soon, hopefully