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New motherboard = Higher CPU Temperatures

post #1 of 43
Thread Starter 
I have just changed my motherboard from an A8N Deluxe to a DFI Nf4 Sli DR and my CPU temperatures have increased by quite a lot. On the A8N my Idle CPU temp was around 26C, now it is 32C. The load temp on my A8N was 36C now it is 46C.

Here are a few possible culprits which I think may be the cause:
1)On the A8N the CPU is positioned in front of the exhaust fan on my case, but in the DFI mobo, the CPU is shifted 3 inches and so is towards the bottom of the exhaust fan.
2)I changed my TIM to AS5 (which I thought would lower my temps!), maybe I applied it wrongly (although I thought I had done a good job at the time.
3)The temperature sensors are wrond on one of the boards

Does anyone know what the cause/solution is?
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post #2 of 43
Did you just put a small blob of AS5 on the CPU? If so, the AS5 takes a few weeks to cure, which should lower the temps by a few degrees.
If you've put a lt of AS5 on, maybe you need to do a re-seat just using the equivalent of about a grain of rice.
Also, the temp probes are probably slightly different.
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post #3 of 43
Quote:
Originally Posted by rustynator
I have just changed my motherboard from an A8N Deluxe to a DFI Nf4 Sli DR and my CPU temperatures have increased by quite a lot. On the A8N my Idle CPU temp was around 26C, now it is 32C. The load temp on my A8N was 36C now it is 46C.

Here are a few possible culprits which I think may be the cause:
1)On the A8N the CPU is positioned in front of the exhaust fan on my case, but in the DFI mobo, the CPU is shifted 3 inches and so is towards the bottom of the exhaust fan.
2)I changed my TIM to AS5 (which I thought would lower my temps!), maybe I applied it wrongly (although I thought I had done a good job at the time.
3)The temperature sensors are wrond on one of the boards

Does anyone know what the cause/solution is?
I experienced similar problems when I switched for my old EPOX 9NPA+Ultra to my DFI. Same CPU, same cooling setup. Load temps. went up 5 full degrees. Tried everything from reseating the heatsink to replacing it with another XP-120. After a few weeks I noticed that temps. went down a little leading me to think that the AS5 started to break in. Temps. still seem a bit off, so I concluded the sensors might be screwed up.
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post #4 of 43
It might be due to how much power the DFI bords recieve. I believe you now have 4 power connectors compared to the 2 your old board had. With that much more power going into the board, one could assume that the board will get hotter effecting everything on it. Also I think you are also right about the repositioning of the CPU. Heat from the CPU wont escape out the exhaust fan as quickly. Definetly check your AS5. You don't want too much on there.

EDIT: If your going to keep that board, you may want to change your system specs.
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post #5 of 43
Thread Starter 
I think I may have put a bit too much of AS5 on. Is the one rice size amount sufficient or do you need a little more?

I would really like to reposition the fan so that it is directly behind the CPU. but the holes for the fan in my case would not be directly behind the fan if I moved it.

What specs do I need to change if I am to keep the DFI board?
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post #6 of 43
Quote:
Originally Posted by rustynator
I think I may have put a bit too much of AS5 on. Is the one rice size amount sufficient or do you need a little more?

I would really like to reposition the fan so that it is directly behind the CPU. but the holes for the fan in my case would not be directly behind the fan if I moved it.

What specs do I need to change if I am to keep the DFI board?
Yes the rice size amount should work, just spread it out over the hole IHS. If you need to add a tad more than do so.

I was refering to your system specs at the bottom of your thread. You motherboard still says A8N-SLI
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post #7 of 43
Thread Starter 
Oh I see, I was wondering what I needed to change to keep the DFI board...lol

I will reapply the AS5 and report back tomorrow. If I can get my load temps to back around 40C then I will be very happy.

I wish I could reposition the exhaust fan so that it was behind the CPU again.
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post #8 of 43
Chances are ur current temp is right, u just have to wait for AS5 to cure or break in. also depending on ur ambient temps u could be comparing ur old temp when it was cold compare to now which is a lil bit hotter. and what voltage do u have on ur vcore? is it the same as on ur asus?
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post #9 of 43
Thread Starter 
I definitely do need to let the AS5 settle in a bit longer, but a 10C rise in load temps seems a little high despite this (especially when I am now using better TIM than before)

The ambient temps is similar to before (probably a bit lower as it is actually snowing at the moment!) so I dont think that is the problem.

My Vcore is at 1.50V, so not too high. That is ever so slightly higher than before (was 1.47ish then), but when I tried out a higher voltage on my old board, the temps did not shoot up this much.
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post #10 of 43
Takes about 200 hours for it to cure, also Asus mb are bad about faulty sensors.
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