FPS Drops during Gaming (180 down to 40 FPS): FX8350

Leodius · Feb 6, 2016

So, as the title already says, I am having constant FPS Drops in certain games. I especially notice this whilst playing CS:GO. I usually run it at 180 FPS and then it suddenly drops to 30-40 FPS for 4-5 seconds. Here are some of the solutions I have tried:

Clean windows and driver install
Reinstalling the games which have this problem
Putting the GPU into another PC. It worked fine with no FPS drops.
Updated my Audio Drivers
Changing some settings in the Nvidia Control Panel

I should also mentioned that I recently got a new PSU, Motherboard, RAM and SSD. I did however have the problem before then aswell. The only thing which is really left is my CPU. I have run several benchmark tests to see if both the GPU and CPU are overheating, but neither go higher than 55 degrees.

Here are my Specs:

Windows 10 64 bit
ASRock 970 Extreme3 R2.0 Motherboard
EVGA GTX 750 Ti
16 Gb HyperX Fury RAM
Corsair VS450 PSU
AMD FX8350 CPU
Corsair H55 Liquid Cooling System

Any help would be greatly appreciated!

DonkeyOatie · Feb 6, 2016

There may be other issues, but you have a big problem with your motherboard. That motherboard's power delivery system, (VRM) is not capable of driving a FX83xx series chip, reliably, at full power, especially in a high-performance application like gaming. The VRM overheats and then must throttle back until it cools down to a safe temperature.

You can help a bit by using zip ties to fit a case fan to blow down on the VRMs (the components on the motherboard between the socket ant the I/O shield) A top-down air CPU cooler would work too. Liquid cooling turns out to be the worst possible choice in this situation because it takes the air movement away from the motherboard.

In the long run, you must replace your motherboard, or throttle back your CPU to prevent this.

GhislainG · Feb 6, 2016

Using liquid cooling makes the issue worse; to alleviate the issue until you get a better motherboard, add an Antec SpotCool (or create your own solution) to cool the poor VRM.

Leodius · Feb 6, 2016

Thank you for your reply. How would I throttle back my CPU as I do not have the money at the moment to buy a new motherboard?

DonkeyOatie · Feb 6, 2016

Try the case fan solution first. Even moving an existing fan can help a lot.

You need to underclock your CPU. Turn off Turbo Boost and set Cool and Quiet, for a start. It will impact your gaming performance, but at least it will be a lot more consistent.

Leodius · Feb 6, 2016

Ok, I think I have been able to temporarly solve the issue. I re-positioned some fans so that I was able to add another out-take fan. As a result, I now have no FPS drops anymore and my MB doesn't go higher than 60 degrees under stress. I guess this has fixed it for now, thank you so much!

GhislainG · Feb 6, 2016

To protect the VRM in the long run, I'd add a fan to cool it.

Leodius · Feb 7, 2016

So, why am I having this problem with the VRM even though the list of supported CPUs of the motherboard has the FX8350 in it?

GhislainG · Feb 7, 2016

There is a difference between supporting the CPU and being able to keep it at full load for an extended period of time. It has to throttle it to protect itself. but it supports it. Why didn't you buy a motherboard with an 8+2 phase VRM designed for 140W or more processors? As an example, a Gigabyte GA-970A-UD3P only costs a bit more and it doesn't have the throttling issue.

Karsten75 · Feb 7, 2016

Leodius :

Did you look at the ASRock CPU support list for that processor: http://www.asrock.com/mb/AMD/970%20Extreme3%20R2.0/?cat=CPU

Did you notice the very specific red asterisk that says:

* For cooling the CPU and its surrounding components, please install a CPU cooler with a top-down blowing design.

DonkeyOatie · Feb 7, 2016

Leodius :

A car may 'support' being driven (Smart Car), but may overheat if driven at 100 m.p.h. up and down and through a mountain range and WRC competition.

That CPU is supported in the sense that is will fit and run in the socket, with the recommended down-flow CPU cooler and will do basic home and office tasks (browsing, e-mail, word processing, spreadsheet, simple graphics)

Gaming is a very intense, high performance use for a computer, equivalent to competitive motor sport, racing, for a car.

That particular motherboard is suitable for only the lightest tasks (like the Smart Car). The vendor assumes that you know what you are doing and are aware of the limitations, especially if you bought the CPU elsewhere or at another time.

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