AMD Radeon HD 7990 review

Serious AMD engineering, but is it too late to the ultra-enthusiast party?

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As effective as the cooling is, The AMD Radeon HD 7990 is never going to have the premium aesthetic of the GTX Titan. In graphics card terms, it looks like a super car - it's practically got alloys.

And if we take straight-line performance out of the equation and go for that experience angle, a multi-GPU card is never going to be able to compete against a simple, single-GPU card - especially one that's a little cheaper and only a bit slower in most cases.

Sadly, the HD 7990 is one of the flakiest cards we've tested in a long while. We were finally able to coax some impressive performance figures out of it, but only after a good long while of sometimes only having a single GPU turning up to the benchmarking party. This is no doubt down to the early drivers we've had to use for pre-release testing and not the hardware itself, but that's a plain reminder of the vagaries of multi-GPU gaming.

When you fire up a new game on your CrossFireX or SLI rig, you'll always be wondering whether one or other of your GPUs has gotten confused and wandered off somewhere else. As impressive a feat of engineering as this beast is, there are faster, smoother and cheaper graphics arrays available, and much better enthusiast experiences to be had elsewhere.


Tech Specs

Product TypeGraphic Card
Chipset ManufacturerAMD
Chipset ModelHD 7990
Chipset LineRadeon
Chipset SeriesHD 7000
Maximum Resolution2560 x 1600
Brand NameGigabyte
Standard Memory6 GB
Host InterfacePCI Express 3.0
HDCP SupportedYes
Bus Width768 bit
Multi-GPU TechnologyCrossFireX
Digital SignalYes
Dual Link DVI SupportedYes
Number of DisplayPort Outputs4
Number of DVI Outputs1
Height126 mm
Memory TechnologyGDDR5 SDRAM
Form FactorPlug-in Card
Length320 mm
ManufacturerGIGABYTE Technology, Inc
Memory Speed6000 MHz
Product ModelGV-R799D5-6GD-B
Product NameHard-Core Gaming GV-R799D5-6GD-B Radeon HD 7990 Graphic Card
Product LineHard-Core Gaming
Manufacturer Part NumberGV-R799D5-6GD-B
Manufacturer Website Address
Marketing Information

ATI Radeon HD 7990 Chipset

  • Integrated with the first 6GB GDDR5 memory and 768-bit memory interface
  • Support AMD Eyefinity™ & CrossFireX™ & Avivo™HD
  • Features Dual-link DVI-I / Mini Displayport*4
  • System power supply requirement: 750W (two 150W 8-pin PCI Express® connector recommended)
  • Powered by AMD Radeon HD 7990 GPU
Thickness40 mm
API SupportedDirectX 11.1, OpenGL 4.2