The impressive cooling system successfully handles its task.
Several years ago, Blizzard Entertainment held a promotional campaign where they raffled off a Diablo-themed PC. It stood out not only for its design but also for its specific cooling system with "human blood."
The streamer Storms888 was the lucky recipient, and he recently spoke with Aftermath, revealing that the PC is still functioning:
Since I got it, I haven't noticed the slightest drop in performance. … It's just amazing for streaming and recording. I'm currently streaming Battlefield 6 on ultra settings and consistently getting over 200 FPS.
Storms888 explained that the cooling system doesn't use pure blood but a mixture of regular coolant and erythrocytes:
This cooling liquid is a regular standard coolant with added erythrocytes. They didn't specify the ratio, but the liquid is dark red. There is no information about [who exactly is its donor].
Storms888 intends to keep the Diablo-themed PC and has no plans to modify it. He hopes to pass it on to his children.