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CPU voltages

post #1 of 13
Thread Starter 
I hear that you can use up to 1.5 volts on air safely for the CPU, but wouldn't that really make you push the thermal limits of the CPU? If I take my CPU above lets say 1.45 volts my temps at idle push 50C. Is there some other factor that plays into how hot the CPU gets? Maybe it is just me but can't you get a decent OC on most CPU's using 1.4V or do you have to bump the voltage up past that to get a good one?
Please help because I am confused right now lol
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post #2 of 13
voltage limits are dependant upon what manufacturing process the CPU is made by and what core it uses so 1.5v is a general limit for 65nm but it's not true for every CPU. A lot of things factor into your cpu temps. Ambient temps, case fans, cpu cooler, thermal paste, CPU to CPU Cooler contact, but it is possible to have safe temps even at that vcore, it just takes some work depending on your climate and setup. How much vcore you need is going to be specific to your CPU. For you it may take more than 1.4v for you but not for the next guy, you just have to test and find out. I can't tell you the voltage limits for that CPU as I am a bit out of the AMD loop but I'm sure someone else will follow with that info.
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post #3 of 13
Howdy!

Have you tried re-seating your heatsink? Maybe try lapping your CPU? Those temps seem a little high. What Temp software are you using (coretemp?)
    
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post #4 of 13
Thread Starter 
I monitor using asus PC probe and coretemp 0.97.1 I have reseating the HSF and am using AS5 so I have no clue. Also PC probe always shows 10 degress higher than core temp so which one is right?
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post #5 of 13
coretemp may not be reading it right. coretemp is designed to read intel CPUs by my understanding so stick with asus probe, speedfan or everest for temps.
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post #6 of 13
Quote:
Originally Posted by wheth4400 View Post
I monitor using asus PC probe and coretemp 0.97.1 I have reseating the HSF and am using AS5 so I have no clue. Also PC probe always shows 10 degress higher than core temp so which one is right?
Wheth, have you tried out Everest for checking the temperatures? What is your room ambient temperature? 50C is pretty darn high for idle at 1.45volts. Even for an aftermarket cooler that is high. In response to your question, if your on air my opinion would be not to take it over 1.45volts.

Quote:
Originally Posted by Mr. Jules View Post
coretemp is designed to read intel CPUs by my
Jules, so it's not designed to read AMD processors properly? This the first I have heard about this.
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post #7 of 13
Thread Starter 
Ok this is making no sense to me I went and bought everest ultimate 4.05 and the temps are on par with PC Probe, but I am only at 1.4 volts and am seeing 50C idle and 68C under. My OC is at 227*15 and those temps are about what it is at running 210*16 so I am pulling my hair out trying to figure this out. Oh and the temp in the house is 77 degrees.
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post #8 of 13
Quote:
Originally Posted by wheth4400 View Post
Ok this is making no sense to me I went and bought everest ultimate 4.05 and the temps are on par with PC Probe, but I am only at 1.4 volts and am seeing 50C idle and 68C under. My OC is at 227*15 and those temps are about what it is at running 210*16 so I am pulling my hair out trying to figure this out. Oh and the temp in the house is 77 degrees.
Wheth, case airflow shouldn't be a problem since you have the Antec 900. I'm thinking your cooler may not be properly mounted correctly. How much thermal compound did you apply? Have you checked the base of your cooler? Is it concave, scratched, dinged ect? Perhaps it may have a horrible finish.

Good luck
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post #9 of 13
Thread Starter 
The base looks normal when I applied the AS5 I put a BB sized drop in the center of the IHS and use a sandwich bag around my index finger to spread it evenly across the IHS then mounted the HSF. I have the ZALMAN 9500 fan facing foward, should I have the fan facing the top fan? I read some where on here that it is better to do that.
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post #10 of 13
Quote:
Originally Posted by wheth4400 View Post
The base looks normal when I applied the AS5 I put a BB sized drop in the center of the IHS and use a sandwich bag around my index finger to spread it evenly across the IHS then mounted the HSF. I have the ZALMAN 9500 fan facing foward, should I have the fan facing the top fan? I read some where on here that it is better to do that.
Wheth, per AS5 instructions you only need to apply the BB size drop and seat the cooler. Spreading the thermal compound is not needed. The thermal compound will spread for you when you mount and lock down the cooler.
Have you thought about lapping both the heatsink and IHS? I've always gotten great results from doing that. Here is the guide that I always follow: http://www.overclock.net/air-cooling...ltake-big.html

Good luck
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