What To Look For When Buying A Used GPU

On one end of the spectrum, you might run across a used GPU from someone who occasionally played some “Fortnite” or “Factorio,” and kept their case relatively free from dust buildup. In this ideal scenario, the card wasn’t likely ever pushed very hard, and is still in great shape with plenty of life left.

However, if you discover the GPU toiled away endlessly in hot temperatures as part of a cryptocurrency mining rig, you might want to steer clear. While this issue was certainly more common a few years ago following a crash in the cryptocurrency market, some of these cards could still be out there in the marketplace. Consider closely examining the exterior of the card and look for discoloration on the circuit board, which could indicate overheating.

You might also be wary of a used GPU that was overclocked. Regardless of if you know how to overclock your gaming PC and the risks to be aware of, you’ll want to get more information from any seller who has exceeded the stock settings on their GPU. Overclocking a graphics card can be done carefully in a way that minimizes risks. But those who don’t go through the proper steps and carefully balance performance increases with stability, can cause future trouble. Even if the overclocking was done correctly, more power and higher heat can shorten GPU lifespan.

While it may not be feasible in every case, running a stress test on a used GPU can give you some peace of mind. You might not get the full story from the seller, but the figures produced from tools like UNIGINE’s Heaven benchmark, FurMark, or 3DMark can identify red flags before money changes hands.

For example, as the card is put through its paces rendering intensive visuals, do you see any strange artifacts such as colors or lighting that don’t fit the scene, strange symbols, or lines appearing at random? These visual anomalies can be caused by computational mistakes within the processor, excessive temperatures, or simply be a sign the card is preparing to leave this mortal coil (its dying).

Other negative signs during a stress test would include any crashes, and if the GPU becomes unusually hot. Verify the GPUs cooling system (its fans) are running properly and ramping up correctly to keep pace with increasing load. You’ll want to ensure before purchasing, that the card runs at the ideal GPU temperature range for gaming, and isn’t overheating.

A used card comes with risks that you don’t get with a new GPU. You can never be completely sure what environment, what demands, and what maintenance was performed on a previously owned PC component. Therefore, you’ll need to decide how much savings is worth choosing a used card over a new one. A used RTX 4080 Super may only net you a slight discount over a new card, whereas an RTX 2080 could provide a very hefty discount.

Current top-end cards offer terrible value — the Nvidia RTX 4090 is available on for around $1,578 used on average, and sells new for more than $1800. While the used card might save you a few hundred dollars, at prices above $1,500, why not pay the extra few hundred for brand new? Some of the best used deals can be found around the $300 price point, where you can get an AMD RX 6800 with 16GB of VRAM. At this price bracket, you can opt for the Nvidia RTX 30 series cards that offer ray tracing capability, however with only 8GB of VRAM, your ray tracing performance may not keep up with newer titles. In terms of NVIDIA versus AMD, there are pros and cons of each graphics card brand, but you can find some great used deals with a little due diligence, regardless of the brand.