Why your gaming PC keeps losing fps: safe checks

Quick Answer

If your gaming PC keeps losing FPS over a session, the usual culprit is thermal throttling - the CPU or GPU heats past its limit and slows down, dropping you 10-30 frames after 15-20 minutes. Other causes are background apps stealing resources, a dirty driver install, or a full boot SSD. Log temps first; if the GPU passes 83 degrees or the CPU passes 90, cleaning dust and reapplying paste (around R250-R450 at Evetech) usually restores steady frames.

Throttling is the prime suspect

A high average FPS that decays mid-game points straight at heat. Use HWMonitor to watch clock speeds and temps together: if clocks fall as the GPU crosses 83 degrees or the CPU crosses 90, that is throttling. Healthy load temps sit under 80 degrees (GPU) and 85 degrees (CPU). Dust and dried paste are the most common causes in SA homes.

Software causes you can fix free

Background apps quietly eat performance - close Chrome, Discord overlays, and RGB software before blaming hardware. Do a clean GPU driver install with DDU and the latest driver to clear corrupted state. Set the Windows power plan to High Performance and confirm your boot SSD has at least 15% free space, since a full drive causes streaming stalls that read as FPS loss.

Hardware fixes that hold frames

If software is clean and temps are high, improve cooling: clean the heatsink, reapply Arctic MX-6 (around R250-R450), and confirm at least two intake fans feed cool air to the GPU. If your card is genuinely too weak for the resolution, a current GPU like the RTX 5060 (around 90-120 FPS at 1080p Ultra) or RX 9070 XT (around 100-140 FPS at 1440p) restores headroom. Both are stocked locally at Evetech.

FAQ

Why do my FPS drop the longer I play?

That decay is almost always thermal throttling - the GPU or CPU heats up until it slows to protect itself. Log temps with HWMonitor; cleaning dust and reapplying paste usually restores steady frames.

Can background apps lower my FPS?

Yes - Chrome tabs, Discord overlays, and RGB software all consume CPU and RAM. Close them, and check that your boot SSD has at least 15% free space, since a full drive also costs frames.

How do I know if my GPU is just too old?

If frames are low from the very first minute (not just after warming up) and temps are fine, the GPU is likely the limit. A current card like the RTX 5060 or RX 9070 XT restores headroom at 1080p and 1440p.