TweakTown
Tech content trusted by users in North America and around the world
5,677 Reviews & Articles | 36,088 News Posts
Weekly Giveaway: Fractal Design Arc Cases Contest (Global Entry!)

AMD Radeon HD 6990 4GB Video Card AUSUM Mode in CrossFireX

Two cores on one card is all great and that, but let's get two cards and four cores in our testbed system for a real party.

| AMD CrossFire Articles in Video Cards | Posted: Mar 19, 2011 3:46 am
Manufacturer: AMD

Introduction

 

TweakTown image content/3/9/3938_02_amd_radeon_hd_6990_4gb_video_card_ausum_mode_in_crossfirex.jpg

 

We've seen CrossFire really blossom since the launch of the HD 6000 series with just some insane performance gains being seen from these new single GPU cards. When throwing in a second card we're seeing gains that sometimes equate to almost double the performance. Considering that you can't really expect any more than that, it's really amazing to see AMD really put huge amounts of effort into the improvement of this technology.

 

Moving to more than two GPUs has never yielded the same performance increases. The HD 5970 as good as a card it was, when you went down the path of two the performance was really quite uneventful. Sure, there were pieces of shining light here and there, but on a whole it was a tough recommendation to go down the four GPU path.

 

So with all these performance improvements with the latest generation of cards from AMD, how does that translate with the new dual GPU beast from AMD which when in CrossFireX carries with it four GPUs?

 

With the help of our second HD 6990 from AMD we're going to find out exactly what's going on today. Because it's a reference card, we'll just have a quick look at the card itself as there's no package. Then we'll just quickly run over the specifications.

 

The Card

 

TweakTown image content/3/9/3938_03_amd_radeon_hd_6990_4gb_video_card_ausum_mode_in_crossfirex.jpg

 

TweakTown image content/3/9/3938_04_amd_radeon_hd_6990_4gb_video_card_ausum_mode_in_crossfirex.jpg

 

TweakTown image content/3/9/3938_05_amd_radeon_hd_6990_4gb_video_card_ausum_mode_in_crossfirex.jpg

 

TweakTown image content/3/9/3938_06_amd_radeon_hd_6990_4gb_video_card_ausum_mode_in_crossfirex.jpg

 

Of course, you're not really seeing anything here that you didn't see from the Sapphire version with the fan in the middle of the card blowing onto two Vapor Chamber coolers. The card is powered by two 8-Pin PCI-E power connectors and we've got our single CrossFire connector and BIOS switch that enables "AUSUM" mode. Connectivity comes in the form of four mini DisplayPort connectors and a single Dual-Link DVI.

 

Specifications

 

Because our time with this HD 6990 is quite limited and it really has to do the rounds, we thought we'd just crank the card into AUSUM mode which means our core comes in at 880MHz instead of 830MHz which you can see below.

 

TweakTown image content/3/9/3938_01_amd_radeon_hd_6990_4gb_video_card_ausum_mode_in_crossfirex.gif

 

As for the 4GB of RAM, that comes in at 5GHz and the most important piece of information here is the CrossFire tab which shows us that the technology is indeed enabled, and in this case is running 4 GPUs.

 

Related Tags

Further Reading: Read and find more Video Cards content at our Video Cards reviews, guides and articles index page.

Do you get our RSS feed? Get It!

Post a Comment about this content

Latest Tech News Posts

View More News Posts

Latest Downloads

View More Latest Downloads

TweakTown Web Poll

Question: Did EA kill the Battlefield franchise with the terrible BF4 issues?

Yes, Battlefield is doomed

No, Battlefield will live on strong

I'm not sure, but I know EA needs to improve its game

or View the Results

View More Polls

Forum Activity

View More Forum Posts

Press Releases

View More Press Releases
Get TweakTown updates via Facebook!
Just click the "Like" button below