Question CPU performance worsened

[patiladitya781]

I recently replaced/upgraded my old GPU. In the process, I put my old APU in place of the CPU to use its iGPU for troubleshooting the new gpu (it wasn't displaying). It turns out that the problem was my CPU OC settings (I don't know why), so I had to reset BIOS. I then put my CPU back in, but its performing very bad. Even without the OC I didn't expect this bad performance. Even CSGO stutters a lot. The temps are fine (60s range) but the CPU usage hits 100 a lot. I scanned for malware, but still no luck. Why is this happening? And why won't the GPU display when CPU is OCed even slightly?

My specs are:
Athlon X4 740 (Locked multiplier, was OCed by increasing FSB)
XFX RX 560D DD (replaced GTX 460)
Gigabyte GA-F2A55M-DS2 (rev. 3.0)
8 Gb DDR3
Corsair VS450

 

[NightHawkRMX]

I would make sure memory and cpu are running at rated speed. You may not get good performance due to the the age.

 

[Wayfall]

You have a CPU bottleneck plain and simple bud that CPU architecture is ancient.

 

[patiladitya781]

I would make sure memory and cpu are running at rated speed. You may not get good performance due to the the age.

They are. Though the CPU boost multiplier goes only up to 35 when it should go to 37

 

[patiladitya781]

You have a CPU bottleneck plain and simple bud that CPU architecture is ancient.

I know, but the game in question is older than my CPU and runs better on potato PCs. CSGO used to run at 90-130 fps, now its running at 20-60 fps with stuttering.

 

[Wayfall]

Doesn't matter, the engine is terrible.

So crap performance.

 

[NightHawkRMX]

Try uninstalling gpu drivers using ddu and reinstalling drivers. I would assume drivers got messed up when you installed an apu with different gpu built in. That cpu is quite weak.

 

[Finstar]

Did you reset the bios before switching cpus?

 

[patiladitya781]

Doesn't matter, the engine is terrible.

So crap performance.

But it was running fine a few days ago. I even played on stock frequency just a week or so ago and it was still fine.

 

[patiladitya781]

Try uninstalling gpu drivers using ddu and reinstalling drivers. I would assume drivers got messed up when you installed an apu with different gpu built in. That cpu is quite weak.

That did happen actually. Games were crashing at launch and a few times the pc rebooted, so I did that and that problem is fixed (hopefully). I realized this problem later when I tried some CPU intensive games like BF4 and CSGO. FC5 ran fine, 45-70 fps (ultra) with drops to 25-30 when the cpu usage hit 100, I thought it was expected until I tried the other games I used to play before when I realized that the CPU performance is worse.

 

[patiladitya781]

Did you reset the bios before switching cpus?

I did not while switching from CPU to APU, that's how I found out that the problem was my OC settings as the APU was displaying and after reset GPU started displaying. Therefore I did reset before switching from APU back to CPU, and once again when I tried slightly OCing and the display went blank.

 

[Deleted member 14196]

You have an old processor and you shouldn’t be overclocking anything with that system and your processors probably fried by now. The CPU is a huge bottleneck

 

[patiladitya781]

I think I've figured it out. Resetting BIOS set the CPU multipliers to Auto, and therefore the CPU is actively being underclocked to achieve sub 70° temperature during gaming. I set the multipliers to their respective static values, the CPU overheated during benchmark. So I think I will have to reapply the thermal paste. Also the Radeon Settings: Host Application uses a lot of CPU.

 

[patiladitya781]

You have an old processor and you shouldn’t be overclocking anything with that system and your processors probably fried by now. The CPU is a huge bottleneck

Thanks man, this solved it.