ColorFire Shows Off Xstorm HD 6850 X2 4 GB Graphics Card
The next interesting feature is the use of DIP-switched based voltage control, which is an old-school yet direct and effective way of tuning voltages. Voltage measurement points are consolidated to a convenient location (next to the power connectors), and are angled for easy access. Lastly, a pair of jumpers near the display output connectors, allows you to switch between two sets of EEPROMs, each having a different clock and voltage profile.
Moving on to the GPU system itself, there are two 40 nm AMD Barts GPUs in the HD 6850 configuration (960 stream processors per GPU). One of the two sets of EEPROMs packs AMD reference speeds, but ColorFire didn't mention details of the overclocked profile. The card draws power from two 8-pin connectors, a 12-phase VRM handles voltage regulation. To cool it all, ColorFire used a custom design dual-fan cooler, which uses a large heatsink to which heat is conveyed by five heat-pipes.