CPU-Z Voltage Trustworthy?

[fighterpilot]

Is the CPU-Z Voltage displayed accurate? I mean it takes it to the nearest thousandth.

I am asking because I need to set my voltage to 1.50V in my BIOS to get 11x240 = 2.64 GHz on my Opteron 175 (standard is 2.20 GHz). I just don't want to bump my voltage too high. If it is truly at about 1.45, I'm fine with it, but at 1.50 I know I'm starting to push it.

Also, CPU-Z toggles between 1.440 and 1.456 volts for some reason too.

Is CPU-Z quite accurate, and do I really need to be that concerned with setting my Opteron 175 to 1.50Volts?

I can get to 2.7 GHz stable for 24/7 at 1.55V set in BIOS but decided to step back a bit since that concerns me about running at the higher vCore and only for 0.5GHz.

 

[sanjeevdas]

I too have the same problem. Set vCore in bios to 1.425 but CPU-Z fluctuates between 1.424 and 1.44 (so does AiBooster).

Sorry, I don't have the answer to yourt question. I'd like to know the answer as well.

 

[bjc112]

Your board could be undervolting..

1.5 is not even a concern on a 939 chip..

 

[jiffylube1024]

CPU-Z is usually more accurate than the BIOS, so it looks like your board is undervolting.

 

[fighterpilot]

Originally posted by: bjc112
Your board could be undervolting..

1.5 is not even a concern on a 939 chip..

True.

For whatever reason I keep hearing with X2 chips to keep the voltage no greater than 10% of rated, so 1.3/1.35 would be 1.43 / 1.49. Although some say 15% is still in the safe zone so would put it at 1.50 / 1.55

 

[furballi]

CPUz is accurate to within 0.01V. The fluctuation is normal as the CPU load raps from 0 to 100%.

 

[BassBomb]

my board overvolts, so i have to change everything from AUTO or STANDARD, to manual, and downclock it myself .. my cpu should be 1.35 /1.4 i dont even know what to put it at.. but i set it at 1.35 in bios and it comes out as 1.375 in cpuz

 

[fighterpilot]

Originally posted by: furballi
CPUz is accurate to within 0.01V. The fluctuation is normal as the CPU load raps from 0 to 100%.

I am assuming that it must read it from a sensor, so anything that reads from that sensor should be accurate?

Does anyone know if CPU-Z will display individual core voltages? With Speedfan, it shows two Vcore voltages, one for each core, and they are rarely ever the same. One will be 1.46 while the other is 1.43. Not a huge discrepency, but enough.

 

[furballi]

Any number below 1.5V is okay with that CPU.