Finally, there's the question of graphics ports. The Radeon HD 7990 has a two-slot cooler and requires just two 8-pin PCIe power connectors. The old PowerColor solution required three 8-pin PCI-Express power connectors and used a three-slot GPU cooling solution. Clock speeds on the official card are slightly higher (1GHz compared with 925MHz) and the AMD card draws significantly less power. There are several differences between the new official 7990 and the older PowerColor custom GPU. The two GPUs communicate directly with each other via a 48-lane PCI-E 3.0 bridge chip developed by PLX. Each GPU is clocked at 1,000MHz, with a 1,375MHz memory clock.

Each GPU contains 2,048 stream processors, 6GB of GDDR5, and a 384-bit memory bus. Spec-wise, the Radeon HD 7990 is a pair of Radeon 7970 GPUs (codename: Tahiti) on the same slab of silicon. As of today, all that changes-the new, official Radeon HD 7990 is meant to compete with both the GTX 690 and GTX Titan at the $1,000 price point.

The Sunnyvale, CA-based company remained mum on the topic of whether it would introduce a new dual-core GPU, even after Nvidia launched the $1,000 Nvidia GeForce GTX Titan in late February. AMD allowed board manufacturers like PowerColor to launch unofficial Radeon 7990s based on custom design work, but elected not to put an official stamp of approval on its own card. Analysts expected the card to launch a year ago, after Nvidia debuted its own dual-graphics solution, the Nvidia GeForce GTX 690. In one sense, the Radeon HD 7990 is actually a bit late to the party.

It's competitive-but exactly how competitive depends on which game you check and whether or not the title is optimized to run on more than one graphics card. The HD 7990 combines two HD 7970 GPUs on a single PCB and includes a huge number of bundled games. Essentially half of the D3 playerbase (AMD users) is playing a broken game.Īpparently you can fix the issue by forcing the game to use the 13.The new AMD Radeon HD 7990 dual-GPU graphics card is meant to challenge Nvidia at the top of the consumer graphics stack. I hope more people will be aware of this so that Blizzard is pressured into doing something. The only way to fix this problem as of now is to revert to old (2014) graphics drivers. Some have reported that certain act V maps experience the same problem.īlizzard is aware of this problem since about a year ago, what makes it completely unacceptable is that they have spent no effort in trying to fix it. Both the normal map and the one that can spawn in a rift is affected making certain rifts impossible to complete.

Audio and input works fine and if you tp back into town and alt+tab the game the screen returns to normal. This is a known issue: Screen freezes on loading screen while in the act II desolate sand map on AMD cards making the whole area unplayable.

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