40% Performance loss and can't figure out why.

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s1lv

Honorable
Jul 27, 2013
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My problem first occurred last night when I opened up the Witcher 3 and was getting between 30-38 FPS as oppose to the normal 50-60 I was getting, I checked in other games too in CSGO 180 FPS instead of 300 and in Skyrim 30 FPS instead of 50. I checked the Temperature and usage on my GPU was normal, then I did the same for the CPU soon as I turned my PC on the CPU temperatures were around 50c on idle but soon as I opened a game the temperatures dropped to 30c and stayed that way no matter what so I'm assuming its a CPU problem. (Normal CPU temps for me are 40c on idle and 55c on full load) Checked for driver updates and scanned for viruses no problems found.

SPECS:
i7-4790k @ 4.6 GHz (Liquid cooled just changed water in loop 2 nights ago but doubt that has anything to do with it)
ASUS GTX 780 @ 1111 MHz
8 GB Ram
1 TB HDD
256 GB SSD



 
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photonboy

photonboy

Titan
Jun 20, 2006
21,567
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85,015
You changed the water two nights ago, then the problem started LAST NIGHT but you don't think there is a relationship?

This is strange though, because it makes no sense to be in 50degC at idle but then drop temperature when gaming. And gaming at 30degC even with water cooling does seem unlikely to me. Try using CPUID HW Monitor.

*Throttling?
It's usually the GPU or CPU, however if you are getting the proper frequency with all threads at near 100% load I doubt there is a CPU issue which only leaves the GPU likely.

I would suggest running these tests for the CPU:

1) Open Task Manager (CTRL-ALT-DEL.. )-> Performance and show all threads (should see EIGHT graphs)

2) Run the CPU diagnostic-> https://downloadcenter.intel.com/download/19792/Intel-Processor-Diagnostic-Tool-64-bit-

3) Shortly after the CPU diagnostic starts you should see about 100% load. During that time observe that:

a) all EIGHT graphs show about 100% usage, and
b) observe the CPU frequency (should be near 4.6GHz perhaps slightly lower; just look next to "SPEED" under the graphs in TM)
c) Observe the CPU Core temperatures (throttling only occurs at 100degC)
 
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photonboy

photonboy

Titan
Jun 20, 2006
21,567
13
85,015
Update:

1) In addition to the above testing, you might want to drop back down to DEFAULT CPU settings and DDR3 memory settings then retest.

2) The CPU outputs a single value based on the highest core temperature. This is used for:
a) Fan speed control, and
b) Throttling (at about 100degC)

3) Benchmark program:
I recommend using one of these for testing like a 3DMark or similar that gives a GPU and a CPU value. Write down the numbers so if you change anything you can retest and easily compare.
 
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