June 15th, 2013 
CryptoBadger Amazon has some of the new Radeon 7990 video cards available. These behemoths are essentially two 7970 GPUs on one card, but require less power than two individual 7970s. That package should make it quite a good choice for cryptocurrency mining, if you can stomach the price tag (although it currently comes with vouchers for 8 free games, which defrays the cost a bit if you choose to resell them).
Anyone tried mining with one of these yet? The speed/power consumption ratio should be comparable to a 7950 (the current king of mining), but with a huge advantage in potential GPU density.
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Would be interested to see what PSU is needed to run 3 of these and also what the thermal side would look like!
I leave this for guys with money to burn to figure out… 🙂
COuld you make another tutorial with this vc?
I haven’t had the opportunity to try one of the 7990s yet. Building a rig with them should follow the same process as the one I outline in my guide though – just with bigger power requirements. If you do give it a try, I recommend one of these power supplies – you should be able to handle at least two 7990s per PSU. Let me know how it goes if you do experiment!
(currently running two Sapphire 7990s, soon to be watercooled)
Agreed on the PSU requirement. Newegg doesn’t take into account the power requirements of mining, so a beefy PSU (or two linked together) is a definite must. Overall I’m pretty happy with the performance of my rig, but the 7990 is not nearly as economical as the 7950.
Omar, what hash rates, watts per hour are you getting from your 7990’s. Thanks!
Right now using cgminer (I 16, no other setting changes) and MSI Afterburner (all stock settings except undervolted to 1.125V) I’m getting 1.1 Mhash/card. My theory is that I 20 and some overclocking will allow for 1.4 Mhash/card, but I’ve been running into temp issues at intensities over 16.
thanks much for the reply, good luck in your future mining!