CPU Overheating after adding memory and replacing video card

Ajaxxe

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My current desktop gaming system was built (by me) in 2010. It has always run well and stable well within temperature limits with no overclocking. I decided it was time for an upgrade so I purchased two more sticks of 4 GB Gskill Ripjaws ram (same part number). and an XFX R9-380-4255 4GB video card to replace an XFX HD-5850. It appeared that the video card was the bottleneck in the system when playing GTAV, and not wanting to spend a lot of money, chose to keep the I5-760 processor, as upgrading that would necessitate buying a new board as well. The motherboard is a Gigabyte GA-P55A-UD3.


When I received the parts, I started by installing the ram and rebooted. Unfortunately, It would not post or boot All I got was a blank screen -. I tried rebooting a few times without any success. I removed the ram, rebooted and went into the bios, and toggled either the XMp and or SPD selections. It was then able to boot so I shut down and reinstalled the new ram, and this time it got to the post screen. I am a little puzzled as to why this problem occurred, but so far it hasn't happened again since.

Next, I uninstalled the AMD software and drivers, installed the new card, and reinstalled the software and drivers. Immediately on booting I got a garbled screen which is probably the logo screen but totally unreadable, then it posts normally and boots into windows just fine. Aside from that issue then, so far so good, I thought.

The card seemed to perform well in GTAV and I was able to turn up all of the eye candy and get very good frame rates, but unfortunately I began noticing the CPU temps getting dangerously high. My CPU temps at idle used to be around mid 30's or so, and would max out at around 65-70 or so playing GTAV. Now I was noticing idle temps in the high 40's/low to mid 50's, and temps over 90 playing GTAV. Not good. I should note that MSI afterburner reports of GPU and CPU usage to be very similar with both cards..

To be safe, and certain, I reapplied some thermal paste to the cooler and proc, but that didn't help. Reinstalling the old video card brought the temps back down to a safe level, but they are still higher than normal. I tried this as i couldn't think of anything else, and think it is rather odd but it appears to be at least partly responsible for the higher temps. (ventilation is not an issue)

I am beginning to think that the MB made some changes which have some impact on the temps, but can't be certain. The settings appear normal. But then again I went in to load the optimized defaults at some point but that didn't improve things.

Anyone want to take a stab at this?

Thanks in advance!



 

Ajaxxe

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Sorry, should have included that in the post. It is a Gigabyte GA-P55A-UD3

Thanks for taking a look at this problem!

 
Here is a theory. Before you replaced the GPU, your xfx 5850 was bottlenecking the rig. Thus, your xfx 5850 was working harder than your i5 760. You replaced the 5850 with a modern r9 380, thus, relieving some of the gpu bottleneck.

Your old i5-760 now has to work harder to keep up with the 380. I think your old i5 is now the bottleneck. Hence, the higher temp.
 

Ajaxxe

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Thanks for the response Benjiwenji. I considered that, but MSI afterburner reports (as noted in my post) very similar usage of GPU and CPU with either card. Then there is the problem of the temps still being higher than normal after reinstalling the old card. Which makes me think now there is a bios setting somewhere that may be partly responsible..
 

Ajaxxe

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Thanks for the response. Actually, ventilation is not the issue - that I am certain of. Anyhow, for much of the testing the case has been on it's side facing up with the panel off.

 

Ajaxxe

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ENERMAX MODU82+ EMD525AWT 525W ATX12V Ver.2.3 SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Compatible w/Core i7 Modular Active PFC Power Supply

I thought about that, but doesn't the 5850 use more juice? Then we still have to account for the temps not dropping back to where they were originally.

 

Puff3r

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First thing to address is the issue with XMP when adding new RAM. XMP is a memory profiler that overclocks RAM for you. As you had just replaced the RAM needing to reset this is not surprising. In the MIT screen in the BIOS, what are the CPU temps reporting?
 

Ajaxxe

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Generally it's around 44-49....used to be mid 30's

 

Ajaxxe

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I tried toggling the settings - don't recall it changing anything.

 


Perhaps reset BIOS to default settings?
 

Puff3r

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I just noticed this post. Running your system with the case open can actually severely negatively affect temperatures. The case is designed with a specific airflow pattern in mind and running it open can cause a delta of up to 5 degrees in some cases. Not that this explains your issues, just a FYI.

As for the XMP portion of my reply, that was in reply to your second question as to why the system did not boot with the new RAM installed. It is not related to the temperatures in the MIT screen.

Are you overclocked in any way? Under Advanced CPU Core features, what are your current settings?
 

Ajaxxe

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Stock cooler from Intel.. Again though, there was never a problem prior to my attempted "upgrade". I would expect that the temps would have returned to normal. One thing I did not check yet but will have to is remove the added memory. Perhaps that has something to do with it.

 


I understand your quest for finding the source of the problem. But these temps aren't too high for a stock cooler :p

Another you can try is to reset BIOS to default settings, in case anything was changed accidentally.
 

Puff3r

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If the processor is getting over 90 while gaming there is definitely a problem.
 

Ajaxxe

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Except for CPU cores enabled = ALL, everything is set to AUTO. No overclocking...

 

Ajaxxe

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Used to get mid to high 60's typically, with occasional bumps into the 70's... Now I peak at around 85, but typically runs low 80's. Very weird..