I saw a couple mining rigs on eBay and they both used some innovative features to keep their graphics cards cool.
(6) 290 Mining Rig
The first mining rig hashes at about 4.5 MH/s for scrypt:
- 2 Raidmax 1000W Gold PSUs.
- 6 ASUS R280x-DC2T-3GD5 graphics cards.
I like the use of the 6 blue LED 120mm fans to keep the ASUS GPUS temperatures below 70C.
(3) 280x Mining Rig
The second mining rig hashes at 2.5 MH/s scrypt. It features:
- Three Asus R9 290 GPUs.
- Corsair AX1200 “Professional Series” power supply.
It makes good use of a staggered pattern for the graphics cards to allow for better airflow.
If your graphics card mining rig is generating too much heat or giving you low ROI because of its power draw, check out GAW Miners for a scrypt ASIC mining rig.