Quick Answer

An RTX 5070 build running hot is a cooling and airflow problem, not a faulty card. Normal load sits around 65-75C; above 88C it throttles. Improve case intake and exhaust balance, clean the heatsink, and set a firmer fan curve in MSI Afterburner before assuming the card is defective.

Read the logs before you swap anything

Open Event Viewer (Windows Logs then System) and look for Kernel-Power 41 (a dirty restart), WHEA-Logger 18 and 19 (a hardware error), and Display TDR 4101 (a driver timeout). Sort by the timestamp of the last fault so you compare like with like. In HWiNFO64, log a five-minute gaming run and check whether the high temperatures you see coincide with a temperature spike, a clock drop, or a voltage dip. A reboot or freeze wipes the screen evidence, so the log is the only honest record of what actually happened.

The fix sequence that actually works

Run DDU in Safe Mode, then reinstall a clean NVIDIA 57x.xx Game Ready driver. In the motherboard firmware, enable Resizable BAR and confirm the card sits in the top PCIe 5.0 x16 slot. Confirm a 650W-class power supply such as a Corsair RM750e or MSI MAG A750GL, and reseat the power connector fully. Watch temperatures: idle should sit around 36-45C, sustained load around 65-75C, and throttling kicks in near 88C.

Where SA buyers usually go wrong

Most call-outs we see locally are not faulty parts at all. Dust build-up from a dry Highveld winter, a cheap unbranded cable, a half-seated power connector, or a stale driver after a feature update cover the bulk of them. Before you budget for a replacement, work the free fixes first: a clean driver pass, a CMOS reset, a dust-out, and a known-good cable cost nothing. If a part genuinely is faulty, every component sold through Evetech carries a local warranty, so you log the RMA here rather than chasing an overseas seller. A quality power supply is the cheapest insurance: a 650W unit from around R1,500 protects a build worth far more.

FAQ

What is a normal temperature for this build?

Under a gaming load, around 65-75C is normal. Idle sits much lower. Throttling and protection trips begin near 88C, so that is the number to watch in HWiNFO64 or the vendor app.

How do I bring the temperatures down?

Balance case airflow, clean the heatsink and filters, re-seat or repaste the cooler if it is old, and set a firmer fan curve. Cable management and a clear front intake matter more than people expect.

Does ambient room heat in SA matter?

It does. A hot room raises every temperature by the same amount, so a build that is fine in winter can throttle on a 35C summer afternoon. Good case airflow gives you the margin to ride that out.

Fix the cause, not the symptom. Before you shop for parts, run DDU and reinstall a clean NVIDIA 57x.xx Game Ready driver on a clean session, then re-test on one repeatable scene. If a part is genuinely faulty, log the local warranty through Evetech rather than guessing.