Since I've covered all the other instances of “custom” Radeon HD 7990 Malta graphics cards, I may as well write about the dual-GPU model from XFX.
Like the ones from AMD's other partners, the XFX AMD Radeon HD 7990 has two 28nm Tahiti GPUs, 6 GB of GDDR5 VRAM, a massive dual-slot heatsink with three fans, the Whisper-quiet Fan Technology, and, of course, the eight games shipped as part of the Never Settle Reloaded program.
Sleeping Dogs, Far Cry 3 Blood Dragon, Far Cry 3, DEUS EX Human Revolution, BioShock Infinite, Tomb Raider, Crysis 3, and HITMAN: Absolution make up the august list.
Like for all other newcomers, the XFX HD 7990 costs $1,000 / €1,000. Check with local retailers to see if it's available, or look it up online. The product page is here.
XFX Also Jumps on Radeon HD 7990 Bandwagon
The company has the powerful dual-GPU graphics card up for sale
... so hot right now