Maximum recommanded Vcore

[Le Québécois]

A while ago when ( november ) I did some testing and came to the conclusion that for gaming there was no point to OC my cpu ( AMD64 3200+ winchester + MSI K8N Neo 2 Plat ) since my Radeon 9800PRO was the bottle neck at 1024 AA4X AF8X. So just for fun ( some of you might remeber this topic ) I played with the Vcore to see how low it could go and still be 100% under 24h of prime95. 1.1V was the magic number for my cpu and I was told it could be an awesome OC.

About 1 week ago I bough an ATI X800XL so now my video is no longer the bottleneck. Now the fun begin...ill see how far I can push my CPU...last time I never gave more juice than the normal 1.5V and reached 2.5ghz with no problem, now I want to push it more by pumping up the Vcore ... But I have no idea if there a limit i should not pass. Do I only limit the whole thing by checking if the temp doesn't go at 61C and more? Or is it a Vcore setting I should absolutly not pass?

 

[KoolDrew]

I wouldn't go above 1.6 with air cooling.

 

[ssvegeta1010]

Normally within 10% of stock vCore is okay, but 1.65 is quite high.

 

[Hacp]

I would stick with 1.55 (if your mobo allows it) to be safe. I def wouldn't want to fry the CPU, and also more voltages=hotter processor. Also, at 2.5 GHZ, I think that the processor now fails to be the limit and its the card thats the bottleneck. Not sure though.

 

[MADMAX23]

1.6v should be the MAX for Air cooling...

 

[exar333]

you will soon get to diminishing returns on the winnie....most max out between 2500 and 2700mhz. I would advise not to go much above 2.6v or you will not the processor too long!

gl with the OC!

 

[Le Québécois]

So, if I can reach 2.5ghz at the normal 1.5V its good and a shouldn't go higher?

 

[Le Québécois]

Ok..doing some test now...and something came up in my mind....ok for CPU temp...but what about the mobo temp ( or the system temp if you prefer ) right now its a 36C ...what the max I should look for?

 

[Hacp]

Is this under full load?

 

[Le Québécois]

well...under prime95 stress test ( the one with max heat and power...)

 

[cbehnken]

1.65 volts has been working fine for me since about March on modest air cooling, but my proc is a POS anyway...

 

[nealh]

from what I read at extremesystems.com...1.65v seems safe long term...I have been running at 1.6v for nearly 8mo with no issues with XP90 @2550

 

[Le Québécois]

Ok..now stable at 2.4ghz with my memory running a 400 (2x200=400) and at 1.45V...now..should i push it more? What king of gain will I see since I cannot make my memory run at 200 again unless I can OC to 3ghz.. Its there a great lost in speed by running my memory slower?
BTW can't risk to Overclock the ram...its normal value ram with no heatsink ( infineon if you must know ).

 

[Amps]

I was under the impression that running at higher voltage can actually reduce the heat of the cpu since heat is a product of amperage and by increasing the voltage you are lowering the amperage. I've found this to be true on my Athlon 2500+ that would run at 50 degrees at stock and 48 degrees with a slight increase in voltage. Rather, I think that the increase in heat is from the fact that you often only raise the voltage when you raise the clock speed and the increase in frequency raises the temp.

 

[BadThad]

Originally posted by: Amps
I was under the impression that running at higher voltage can actually reduce the heat of the cpu since heat is a product of amperage and by increasing the voltage you are lowering the amperage. I've found this to be true on my Athlon 2500+ that would run at 50 degrees at stock and 48 degrees with a slight increase in voltage. Rather, I think that the increase in heat is from the fact that you often only raise the voltage when you raise the clock speed and the increase in frequency raises the temp.

Man, that would be sweet. Higher voltage = cooler CPU! Dude, not on planet earth!

 

[Le Québécois]

It would be true if you were to lower the amperage by augmenting the Voltage, but it's not the case you just augment the Voltage ..

V*A=W ...so if V stay the same...you get an higher W and more power means more joules/sec...so more heat...

 

[BadThad]

Originally posted by: Le Québécois
It would be true if you were to lower the amperage by augmenting the Voltage, but it's not the case you just augment the Voltage ..

V*A=W ...so if V stay the same...you get an higher W and more power means more joules/sec...so more heat...

Must be Canadian: In electronics it's V=IR

 

[Le Québécois]

Well d'oh...Le Quebecois..Quebec is canadian province you little genius...V=I*R is just another formula...that has nothing to do "Directly" with the W wich is important when you talk about temp... because..come on..you can find the V, W and A ( I if you prefere ) on a computer...but who really know the R of computer components.