Phenom II x6 overclocking

cavedog

cavedog

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So I have a Phenom II x6 1100t CPU and Asus Crosshair V Formula and got a coolermaster V6 CPU cooler.

Now I'm overclocking it to 4GHz righ and I just put the
multiplier to 20.0
CPU voltage to 1.468
CPU NB Voltage to 1.325

Is stable and doesn't give blue screen but the temps shoot up to 66-69 degrees when I run it with prime for about 15min.

Now I have googled so much I'm actually tired.

Any 1 know why the temps are so high and I'm sure its not normal. The Idle temps are about 38-40 degrees.

I have a club 3d 6850 oc edition and I want to crossfire with another one and was told that the CPU at stock 3.3GHz will have a bottleneck. So before I buy another one I was trying to oc my CPU but now i don't want too cause the temps are quite high.


I used the thermal paste that came with the coolermaster v6. Could it be the paste or is it simply the cooler that is not good enough? Or have I overclocked my CPU like a noob [which I am btw ]
 
What temps do you get at stock speeds? I got about 60c max at 4.0ghz at 1.45v. Your CPU won't bottleneck THAT much at 3.3 though.
 
I have the same CPU running stock speed, HSF on an Asus board - 38 degrees idle and 47 degrees full out (closed case, 3x in fans and 1x out fan), with the ambient air temperature at 29 degrees currently - so if you have yours clocked to 4GHz with idle at 38-40 degrees, that seems fine imo...
 
I read by googling and was told by a couple of guys that running 2x HD6850's would most likelye cause a bottleneck at the CPU and that overclocking it to no less than 4.0GHz would be best.

I don't know the stock voltages have to check they were on auto so not quite sure have to check.

If I set the voltage less than 1.468 for a 4.0Ghz clock I get blue screen if I run prime. So that is why its a bit higher cause it doesn't blue screen now on prime but the temps just sky rocket! I ran prime 95 now for 10 minutes and the temp was like 66 degrees.

Now for a coolermaster v6 is that normal or is it too hot cause I saw that max 60 degrees after that is not stable at all.
 
cavedog said:
I read by googling and was told by a couple of guys that running 2x HD6850's would most likelye cause a bottleneck at the CPU and that overclocking it to no less than 4.0GHz would be best.

I don't know the stock voltages have to check they were on auto so not quite sure have to check.

If I set the voltage less than 1.468 for a 4.0Ghz clock I get blue screen if I run prime. So that is why its a bit higher cause it doesn't blue screen now on prime but the temps just sky rocket! I ran prime 95 now for 10 minutes and the temp was like 66 degrees.

Now for a coolermaster v6 is that normal or is it too hot cause I saw that max 60 degrees after that is not stable at all.
Click to expand...

The official thermal limit is 65, in reality they can take quite a bit more. It isn't a comfortable temp but that's just howit is. At 1.46 your power consumption will be nearly double stock. That's the only thing that keeps me going to 4ghz permanently on my 1050t. In games you will never see the same temps as in p95 stress tests though. I'm not sure what your v6 should be getting but it doesn't seem that far off the mark.
 
cerebus said:
The official thermal limit is 65, in reality they can take quite a bit more. It isn't a comfortable temp but that's just howit is. At 1.46 your power consumption will be nearly double stock. That's the only thing that keeps me going to 4ghz permanently on my 1050t. In games you will never see the same temps as in p95 stress tests though. I'm not sure what your v6 should be getting but it doesn't seem that far off the mark.
Click to expand...

Ohh ok. So anything more than 4.0Ghz is just a waste of power as you just won't get that much of performance gain.
 
cavedog said:
Ohh ok. So anything more than 4.0Ghz is just a waste of power as you just won't get that much of performance gain.
Click to expand...


You will get a performance gain of course the higher clocks you can go to. The x6 chips are still great performers relative to their pricing. It's just that more volts increase power consumption which effectively makes the chip lower value because it's costing you more to run. I find 3.8 to be a sweet spot for volts, 1.38 is adequate to run stable and my temps hardly even hit 30c unless I am stressing quite heavily.
 
I am running the exact cpu and motherboard you are using. But I'm using a Noctua NH-D14.

My settings for 4Ghz are
CPU Voltage - 1.38125
CPU/NB Voltage - 1.15v (stock I think)

Idle today is 27c and load never goes above 50c

I also ran 4.2Ghz for a bit with the following.
CPU Voltage - 1.48750
CPU/NB Voltage - 1.28125v

Temps were around 52c at full load under prime95.

Highest stable clock I got was 4.3Ghz
CPU Voltage - 1.53125
CPU/NB Voltage - 1.35v

Maybe try my settings for 4Ghz? actually rather try 1.4v for the cpu for a start and stock cpu/nb?

How did you apply the thermal paste?
 
HJF said:
I am running the exact cpu and motherboard you are using. But I'm using a Noctua NH-D14.

My settings for 4Ghz are
CPU Voltage - 1.38125
CPU/NB Voltage - 1.15v (stock I think)

Idle today is 27c and load never goes above 50c

I also ran 4.2Ghz for a bit with the following.
CPU Voltage - 1.48750
CPU/NB Voltage - 1.28125v

Temps were around 52c at full load under prime95.

Highest stable clock I got was 4.3Ghz
CPU Voltage - 1.53125
CPU/NB Voltage - 1.35v

Maybe try my settings for 4Ghz? actually rather try 1.4v for the cpu for a start and stock cpu/nb?

How did you apply the thermal paste?
Click to expand...

Will try. Basically I just pressed the thermal paste out in the center and then the cooler spread it over the cpu. I didn't use a scraper or anything.

http://www.takealot.com/electronics/arctic-mx-4-thermal-grease,8826838

I ordered that now do you think i should replace the one that came with the v6 cooler. Its a coolermaster paste. Do you think the arctic would be better?
 
Rather make 3 very thin lines of paste. Just a splot in the centre will not spread evenly. And yeah good silver paste will help. But mainly you need to work on pushing your volts as low as they can go. 1.46 is going to get hot.
 
Ok just tried

My settings for 4Ghz are
CPU Voltage - 1.38125
CPU/NB Voltage - 1.15v (stock I think)


And its not shooting but still goes to 60 and just sit there at full load.

That said I see that on that asus program it shows the cpu idle at 35 degrees and 1.380V but as soon as you fire up prime 95 the volts gets a boost to 1.4v around there.

So even if i set it 1.38if the cpu is under full load looks like asus gives it a boost.
 
60 on full load is pretty acceptable results. If you're happy, leave it there permanently.
 
Im quite happy yes cause I tried low voltage and usually gave me blue screen.

My main reason for wanting to oc my cpu cause I was told that when I have 2 6850 in crossfire that my cpu will bottleneck with stock 3.3GHz clock.

So I already have 1 6850 just want to pop in another to boost my graphics.
 
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