Beware! Several used NVIDIA GeForce RTX 30 graphics cards with defective memory modules are sold after being misused in crypto mining


 Beware!  Several used NVIDIA GeForce RTX 30 graphics cards with defective memory modules are sold after being misused in crypto mining

The crypto crash has caused several mining companies to move their graphics cards to the reseller marketplace, but while these GPUs will now be available at dirt cheap prices, some users are already noticing various issues such as: B. Defective memory modules.

NVIDIA GeForce RTX 30 series graphics cards with defective memory modules enter the reseller market and are sold after being misused in crypto mining

Well, that’s to be expected, the GPU mining glut is already here and there are several resale sites that currently have NVIDIA’s full range of GeForce RTX 30-series graphics cards listed well below their MSRP.

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The Chinese and Asian markets are currently being flooded with such graphics cards, but the very first users to buy these used cards are noticing several problems. A user on the NGA.CN forums recently paid 3600 RMB or $536 for a used MSI GeForce RTX 3080 SUPRIM X graphics card. This graphics card is currently listed at Newegg for over $1100 and is a premium model. So paying half the price for a used variant doesn’t sound like a bad deal. Even compared to the MSRP ($699), it sounds like a solid deal.

However, the reason for such a low price for the graphics card was quickly found out for the user. The user noted that all labels have been removed from the screws, meaning it was taken apart at some point. This was to be expected as NVIDIA’s original RTX 30-series graphics card had major heating issues and thermal pads had to be manually replaced by users to achieve better memory temperatures on the GDDR6X modules. Since these cards were used in crypto mining operations, they could have been swapped out multiple times during their mining lifetime.

But that’s not the big problem, the user also discovered that in GPU-z the GeForce RTX 3080 graphics card, which was supposed to have 10 GB of memory, was only shown with 8 GB of VRAM. The RTX 3080 was launched in two flavors, a 10GB model with a 320-bit bus and a 12GB model with a 384-bit bus. There was no production variant with 8 GB of VRAM over a 256-bit bus, and defective memory modules were discovered to be the reason for the lower memory of this card.

Considering how badly these graphics cards were abused in mining, it looks like at some point two of the 10 GDDR6X memory modules gave away and eventually stopped working altogether. This resulted in the card not being able to be sent. But there is already a bypass that allows users to keep using their graphics cards even if a few memory modules died. This is achieved using the memory shielding method, which is very popular in crypto mining, and miners can continue to use the cards despite the extinction of some modules. A video of this method by Bilibili can be seen below:

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The same process works not only for the GeForce RTX 3080 graphics card but for almost every other graphics card and considering that the RTX 3080 is not even the most popular card for mining, there could be several used cards on the reseller market right now , which could have similar modules and masked to show full VRAM configuration in GPUz (another popular way to fool users). Therefore, it is advisable to stay away from all used graphics cards for the time being, no matter how tempting these offers look and how the user himself puts it:

Finally, don’t buy a mining card, never buy it, and don’t buy it even if you just need it.

Now there are multiple ways to get the rest of the memory working again by swapping out the modules entirely. This has already been done by professionals, but that would mean you would end up paying for a different graphics card with the same memory modules, defeating the whole point of paying cheap in the first place. So instead of getting in trouble with a used graphics card, just avoid it at all costs.

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