I'm planning to trade my RTX 5070 Ti plus about $250 for a used Zotac RTX 5080 AMP Extreme Infinity Ultra. The seller previously ran the 5080 with a water block, then opened it, reinstalled the original air cooler, and replaced the thermal paste. I'll be able to test the card before completing the trade. My plan is to inspect it physically, run FurMark for 15–20 minutes, monitor core and hotspot temperatures, and watch for crashes or visual artifacts. What else should I check, and what problems or warning signs would make you walk away? I'm also concerned about warranty coverage and whether the card could have been damaged during the water-cooling installation or the conversion back to air cooling.
3 Answers
Inspect the card closely before powering it on. Check for damaged or rounded screws, missing labels, corrosion, residue around the cooler or fittings, bent PCB areas, and any missing tamper-evident stickers. Confirm the serial number on the card matches the box and any receipt or warranty documentation, then verify whether the warranty is transferable. Also check that the fans spin normally and that all display outputs work.
A stress test is useful, but don’t rely only on a short FurMark run. Use GPU-Z or a similar utility to confirm the exact model and monitor core temperature, hotspot temperature, memory temperature if available, clock behavior, power draw, and fan operation. Run a benchmark or demanding game for 20–30 minutes and test several ports. Walk away if you see artifacts, driver crashes, unusual fan noise, rapidly climbing hotspot temperatures, a major core-to-hotspot temperature gap, or performance that is clearly below expectations.
Before agreeing, confirm the exact amount of cash and compare the value against keeping your known-good 5070 Ti, especially if your current card still has warranty coverage. A used 5080 that has been disassembled may have weaker warranty prospects, and the performance improvement may not justify the extra money if there are any doubts about its history. I’d only proceed if the card passes testing and the warranty situation is clear.
The card having been water-cooled isn’t automatically a problem, but opening it creates risk. The important things are whether the cooler was reinstalled evenly, the correct pads were used, and no screws, brackets, thermal pads, or seals are missing. If the seller won’t let you test it thoroughly, I’d pass.