Bought a new GPU, CPU now getting extremely hot

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Heymish

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Recently switched from an AMD Radeon 7750 to a Sapphire dual-x 7970. Using a AMD FX 4100 CPU. I used to get fine temperatures under load, but now they're rising to around 60 in the case of the CPU, and 70 for TMPIN0 (not sure what this is, it's from Hardware Monitor)

Hoping to find some solution to this, not sure whether it's likely to be an air flow problem, as the new GPU barely fits into my case, ergo I need a new case, or whether I need stronger fans to keep the CPU cool.

Also, GPU temperature is fine (I think), maximum of 50 C under heavy load.
 
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ihog

ihog

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Airflow is a possible reason.

Does anyone think that the more powerful 7970 could be taxing the PCIe controller of the CPU more, thus leading to higher temps? I'm not sure if that's how it works, just a theory, hence why I'm asking others.
 
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subasteve5800

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The 7970 is a much more powerful GPU than a 7750, it consumes more power. More power = more heat.

The cooler on the 7970 is keeping your card at ~50C, but it has to put that heat somewhere and that "somewhere" is into your case. If your case doesn't have good airflow, than that heat just stays in there making everything else hotter and hotter.
 
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Heymish

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That's what my first thought is, but I'm not entirely sure what the best solution to such a problem is?
 
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subasteve5800

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You could add more fans if your case supports it or get an entirely new case. You could also use one of those self contained liquid cooling units (like the corsair H80 or H100) on your CPU and put the radiatior outside the case. That would cool your CPU without dumping heat into the case.

Before you do anything, you might want to try running your rig with the side panels off, just to confirm that airflow is the problem.

 
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lostgamer_03

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The GPU making heat shouldn't be the issue.

What you're seeing is now you're CPU is running at 100% almost all the time in games, because the GPU is way more powerful. This is called bottlenecking, your CPU isn't fast enough to keep up with your new GPU, so it runs at its maximum while your GPU can't be used to its full potential.

With your old GPU it was the other way around.

I would recommend you to upgrade your CPU and get a proper CPU cooler. This way you will get better performance in your games and better temperatures.

 
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logainofhades

logainofhades

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Yea the FX 4100 is a bulldozer chip and not a great performer. Step up to an FX 6300/8320, if your board supports them, and a decent cooler. You are also probably suffering from an airflow problem. What case do you have now?
 
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Heymish

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http://www.ebuyer.com/492089-cyberpower-gaming-squadron-gt-ecc01152

That's the current case, sorry, not sure of the name. Like I said, the card literally just makes it into the case. I tried taking the side panels off, and it did change the temperatures but only a little. Would underclocking the card make much difference as a temporary solution?
 
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DEZn00ts

DEZn00ts

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You are totally wrong. Bought a 970 which stays at least 20c cooler (at 58c-62c max) then my EVGA 660ti 3gb reference model which reached 85c-87c max. THE DIFFERENCE is the reference model had one fan and a closed case design, which essential pushes the heat out of the case. My new 970 strix 4gb has two fans which EXHAUST RIGHT INTO MY HYPER 212! It's not bottlenecking it's just that the better airflow for the GPU means worse airflow for the CPU. In these types of situations you need to get a closed loop cooler.
 
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