Start with evidence from your own machine before swapping any part. Below is an ordered, South African gaming checklist for the symptom in the heading, written so each step is something you can verify yourself before booking a repair or buying a replacement.

Quick Answer

Start with evidence from your own machine before swapping any part. This usually comes down to heat, a marginal cable or background load rather than a faulty RTX 5070. Run a fixed 20-minute test after each change and keep the one that holds at a steady frame rate or a stable temperature under 85C.

Temperatures under load

Log temperatures across a 20-minute session; a CPU sitting at 95C or a VRM past 100C points to airflow or paste, not the silicon. Confirm the case has a clear front-to-back path and that no cable is resting against a 120mm or 140mm fan.

Panel and GPU output checks

Match the panel native refresh, say 144Hz or 240Hz, in Windows so the GPU is not fighting a mismatched mode. Swap the DisplayPort or HDMI 2.1 cable first; a marginal cable causes flicker, ghosting and black-screen blips that mimic GPU faults.

Drivers, BIOS and Windows

Roll the GPU driver back to the last stable release, then do a clean reinstall using DDU so leftover files do not clash. Update the chipset package straight from the AMD or Intel site rather than trusting Windows Update to pick the right version.

FAQ

Should I reset my overclock or EXPO profile?

Yes, as a test. Turn off EXPO and any GPU overclock, run the same load, and see if the fault disappears, since an unstable 6000MT/s kit is a common hidden cause.

Will a BIOS update fix this on its own?

Sometimes, but flash only the latest stable release and reset to defaults afterwards. A fresh BIOS plus a clean chipset driver clears a surprising share of post-update stability faults.

Does heat explain random crashes?

Often. A CPU sitting at 95C or a GPU hotspot past 100C will throttle or shut down to protect itself, so log temperatures across a full session rather than reading one quick number.

Confirm the part before you buy Once the checklist points at a single component, browse the matching GeForce RTX 5070 cards on Evetech and replace only what failed the tests.