Someone has used diamonds and a high-end Nvidia GPU to build perhaps the world's fastest graphics card ever — but you won't be able to buy it yet

The Diamond Foundry's ultrathin diamond wafer.

Diamond Foundry has been trying to figure out how it can use diamonds to keep the temperature of the best CPUs and the best GPUs under control – and it’s generated some gobsmacking results.

Testing on an undisclosed high-end Nvidia GPU – which uses synthetic diamond wafers – has led to roughly three times the recorded performance versus when it was tested with standard manufacturing materials, according to the Wall Street Journal (WSJ).