Originally Posted by ajmidd12
Curve-In, I know that some 955BE's require 1.550v to get to 4.2GHz, when I pushed mine to 4.309GHz it took 1.535v to do so.
The watercooler will help but it still seems your temps are rather high, at the same speeds with air cooled I was cooler than you are with the H50. Ambient may be too high.
Try using IntelBurnTest instead of Prime95, I found that IntelBurnTest will produce much quicker results while stressing your system for stability more than Prime95 in a shorter period of time.
Thanks, I feel a little better about my tries to 4.2GHz. From the rate of CPU voltage change to get stable, it looks like I'd need about 1.500v to get to 4.2Ghz.
I'm going to have to deal with the ambient temps I have - that's why I wanted to get to 4.2 this month. It's not going to get any cooler where I have the PC, at least not mid day.
I looked into burntest, but it didn't seem to be a good choice for AMD and I'm using Linux. I use OCCT, a cpu board temp sensor and a system monitor that shows the load on each core. If it is going to fail the test, it happens in less than 10 miuntes and usually in about 4 minutes.
Originally Posted by dixson01974
What are your temp with the H50?
It's 76f/24c right now and the idle temp is 30c. This morning (I didn't check the ambient) idle was 24c and the stress test @ 3.9GHz topped out at 39c.
Originally Posted by httuner
I highly recommend getting another 120mm fan to do a Push/Pull fan setup on that H50
That's what I have now with the radiator in the top of the case with the fans blowing out.
I went back to 3.2GHz and started with CPU 1.375v, NB freq at 2000 and CPU NBv at 1.15. I took things one step at a time, keeping the CPU volts @ 1.375v, upping the CPU multiplier, and used the NB freq to get it stable. I got to a little lower voltage (1.40v @ 3.9GHz) than I had last time. Going to 2800 on the NB freq, failed every test at each CPU NB voltage I tried. At the same time, 2600mhz @ 1.20 worked that same as having those two items on auto. Going up to NB CPUv 1.30 didn't help with the CPU at 1.40.
No more time for testing today. I'm going to read up on ram timing and voltage to see if that might help. I want to keep the CPU voltage kind of low, so I'm going to keep it at 3.9GHz for now.