AMD Radeon 6790 Review - Benchmarking

Submitted by skipclarke on 7 April, 2011 - 05:00

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System Specs

Virtually all testing on the Radeon HD 6800, 6900 and 5000 Series was done on using the 6900 release drivers. I re-tested all previous cards (HD 6800 and HD 5000 Series) on these drivers, with 16:9 1080p panels. The only exceptions are the HD 6990 and the HD 6790, which each used their release drivers. Prior to loading the new drivers, I performed a removal of all previous drivers with Driver Sweeper.

  • Windows 7
  • EVGA X58 Tri-SLI Motherboard
  • Intel i7 920 at 4x2.67GHz
  • 12GB G.Skill DDR3 RAM
  • 2x Samsung 320GB T-Series HDD (one for the OS and games; one for swap file and FRAPS)
  • LG Super Multi Blu (HD-DVD/Blu-Ray Player)
  • Onboard audio
  • Corsair HX1000
  • My Open PC Doma Pro PCI Case
  • Logitch K340 Keyboard & Performance MX Mouse
  • Ergotech Heavy Duty Triple Desk Stand
  • 5x Dell U2211H IPS 16:9 1920x1080 Displays

My test rig remains unchanged, except for a new case. For easier testing, I recently migrated to the Doma Pro PCI test bench from My Open PC (review on that coming soon).

Hardware Tested

I only have AMD hardware tested for comparison in this review. This is not for lack of wanting to test NVIDIA hardware in Surround, but NVIDIA has not yet decided to support the WSGF with hardware for review and benchmarking. Considering that the WSGF is a hobby that just supports itself, I cannot justify spending the money needed to test NVIDIA cards.

Most of my time is spent working on the site (or other projects), and much of my "play time" is spent benchmarking. Cards would basically only be used for testing, and I cannot reconcile purchasing cards that would only be used for testing. It's simply not a good ROI.

Resolutions Tested

I tested both 1600x900 and 1920x1080 in widescreen, as well as 4800x900 and 5760x1080 in 3x1-L Eyefinity. Additionally I tested in 5400x1920 and 4500x1600 for 5x1-P Eyefinity. This allows for comparison between panels in the 20" and 22" range, as well as performance improvements from dialing back the resolution on notch.

Games Tested

My game selection remains unchanged since the HD 6990 benchmarks.

  • Aliens vs. Predators
  • Battle Forge
  • DiRT 2
  • F1 2010
  • Far Cry 2
  • HAWX (only at 2xAA)
  • Heaven 2 (DX9, DX10 & DX11)
  • Just Cause 2
  • Mafia II
  • S.T.A.L.K.E.R. - Call of Pripyat Benchmark Tool

As always, all games are tested at max settings (unless otherwise noted), with 4xAA and 16xAF enabled.

Notes on Testing

In many areas, I am hitting a CPU limit in widescreen. In several instances the widescreen performance is hitting a wall at 100fps+. In some of these instances older cards appear to be outperforming newer cards by a couple fps. These minor differences are well within a margin of error, and should be considered identical performance.

Since I originally tested the 5800 series (well over a year ago), my system has gathered a certain amount of cruft due to games being installed and removed, and the video drivers being updated on a regular basis. While Windows 7 certainly handles "aging" much better than WinXP or Vista, this alone could account for the few fps difference (considering the difference is only a few percent variation).

Future Testing

I have updated my benchmarks suite as I mentioned in previous reviews. Additionally, I have retested all cards from the Radeon HD 5770 forward on the 10.12 drivers and 16:9 1080p panels. For stock benchmarking there isn't much left to do. The new Shogun 2 title will include three different benchmarks, and I will probably run everything through one or more of those.

In addition to that, I now have a 3D HDTV, and will be doing some reviewing and benchmarking of 3D PC gaming. There is an obvious impact when pushing 3x the pixels (and more FOV) with Eyefinity. What is the impact for rendering the same image twice (with only the original FOV)? We will know soon enough.