I'm a non-Crossfire/SLI supporter... too drivee/software dependent.

Not surprising. Given how long it took them to launch the card it's easy to see that it wasn't a priority for them, and if it even has problems then the best they can do is end it.

Personally, I don't bother with SLI/Xfire. With one single card the games will always work even with outdated drivers, but with dual (or more) cards, you can find a game that won't work. And then there's the micro-stuttering problems and the cost and power consumption.

I hope they launch the newer HD 9xxx series (rumors say that the 8xxx will be skipped as they are using it for rebarded OEM products) soon.

^ This.

Every single benchmark I've seen for SLI/Crossfire setups has wild variations in terms of performance scaling, assuming that the game didn't have hobbling problems with the set up to begin with. It just seems like more trouble than it's worth--and entirely unnecessary in terms of getting good performance.

If I was going to spend $1000 on a card, I'd just put it towards a Titan. Or better yet, just get a 780 and put the savings towards other things, seeing as even that would be overkill for most games at 1080p.

This frame rating thing is really becoming an issue. Conventional methods and tools for benchmarking game performance has become somewhat obsolete when dealing with Crossfire and to a lesser extent SLI.

Its become such a big issue that some reviewers are flat out refusing to do the usual benchmarks of games using FRAPS or similar tools. The whole thing kinda escalated rather quickly in the last few months.

I hope AMD sort out those issues.

The other problem with frame rating and if its to become the new standard for benchmarking gpu gaming performance is that the tools required to do proper frame rating testing is seriously expensive.

This is a bit off topic but its kinda crazy how long AMD has gone without releasing new GPU's.

The 7000 series must have been very good for them.

Optimization has gone a long way already and the manufacturing processes don't shrink as quickly nowadays, so we're stuck for longer with the same architecture. Nvidia is doing the same, but they're naming their refreshes as different series.

If you want to see something really new than wait for TSMC to reach reasonable yields with their new 20nm process. Hopefully they manage to do it next year already.

Nvidia has SLI figured out. The driver issues are minimal, micro-stuttering is non existent and frame latency is as good as with a single card.

AMD not so much... Learned this first hand when I switched to 7950 Crossfire. Never had issues with GTX 580 SLI, and 670 SLI before that...

I'm not surprised they are pulling this card. It really never should have came out as the GTX 690 runs circles around it in terms of power and thermals and offers very similar performance. 

Tri-fire pretty much eliminated any perceivable microstutter for me, but you really shouldn't need Tri-fire to have an acceptable experience.
It rears it's ugly head constantly on my AMD system with dual 6950's unlocked into 6970's though.

With that said, 2x 7970's are not only cheaper than the 7990, but faster too! I always saw the 7990 as pointless, if you are running a system which can handle that card, you are going to have more than one PCI-E slot anyway making it a pretty redundant card.

Just a shame that no single card can push the resolution I'm running with acceptable framerates, I would be all over that like flies to poop, so I really don't have a choice but to go multi-GPU.

It is not the issue here... they don't have a new production process to launch the GCN 2... while the 22nm not get good they have to wait. PS4 GPU already have some features to come in GCN 2 like 8 ACEs and 8 Queued Pipelines.

You shouldnt be dealing with it a lot if you've enabled adaptive vsync

http://www.tomshardware.co.uk/radeon-hd-7990-devil13-7970-x2,review-32563-10.html

Infact read up on that whole section about microstutering as even without adaptive vsync, nvidia spanks AMD in SLI in terms of microstuter.