ATI Radeon HD 2900 XT: Calling a Spade a Spade
by Derek Wilson on May 14, 2007 12:04 PM EST- Posted in
- GPUs
The AMD HD 2000 Series Lineup
The announcement today includes a top-to-bottom lineup of DX10 class hardware including four mobile parts (with one additional DX9 mobile part sharing the HD 2000 series naming) and five desktop parts. While all of this hardware is being made public, we've only got one piece of hardware to bring to the table today: the R600 based Radeon HD 2900 XT.
Performance on all other R6xx parts won't be available until "late June", but we can still talk about what these parts will be when they finally make it to market. On the desktop, in addition to the HD 2900 XT, we will see the Radeon HD 2400 Pro and XT in the "value" segment, with the HD 2600 Pro and XT providing good mainstream-to-midrange gaming performance.
ATI Radeon HD 2600 XT
ATI Radeon HD 2400 XT
ATI Radeon HD 2400 Pro
There is currently no add-in retail hardware planned that tops the HD 2900 XT, but we are hearing rumors that faster parts may be available through OEMs only. This is unconfirmed at present, so take it with a grain of salt. Let's take a look at a break down of what we do know we'll be getting:
| AMD R6xx Hardware | ||||||||
| SPs | RBEs | Core Clock | TMUs | DDR Rate | Bus Width | Memory Size | Price | |
| HD 2900 XT | 320 | 16 | 740MHz | 16 | 825MHz | 512bit | 512MB | $399 |
| HD 2600 | 120 | 4 | 600 - 800MHz | 8 | 400 - 1100MHz | 128bit | 256MB | $99 - $199 |
| HD 2400 | 40 | 4 | 525 - 700MHz | 4 | 400 - 800MHz | 64bit | 128MB / 256MB | <$99 |
It's harder to pin down all the specs of the mobile parts, as all the clock speeds (and sometimes bus width) can change depending on the TDP envelope a notebook maker is working with. While we aren't certain, our best guess is that mobile parts named similarly to desktop parts will have the same internal configuration of SPs, texture units, and render back ends. The exception here is the Mobility Radeon HD 2300, which is a DX9 part based on R5xx hardware.
While 2400 and 2600 standard and XT versions will exist in the mobile space, there are currently no plans for a high end mobile part. This is very likely due to the high power draw and low performance per watt we see with AMD's 80nm R600. We don't expect to see a higher performance mobile part until AMD can get the power consumption of its higher end hardware down (likely with a process shrink).
Just for comparison, let's take a look at what NVIDIA is currently offering as well. Here's a table of all the G8x based parts on the market.
| NVIDIA G8x Hardware | ||||||||
| SPs | ROPs | Core Clock | Shader Clock | DDR Rate | Bus Width | Memory Size | Price | |
| 8800 Ultra | 128 | 24 | 612MHz | 1.5GHz | 2.16GHz | 384bit | 768MB | $830+ |
| 8800 GTX | 128 | 24 | 576MHz | 1.35GHz | 1.8GHz | 384bit | 768MB | $600 - $650 |
| 8800 GTS | 96 | 20 | 513MHz | 1.19GHz | 1.6GHz | 320bit | 640MB | $400 - $450 |
| 8800 GTS 320MB | 96 | 20 | 513MHz | 1.19GHz | 1.6GHz | 320bit | 320MB | $300 - $350 |
| 8600 GTS | 32 | 8 | 675MHz | 1.45GHz | 2GHz | 128bit | 256MB | $200 - $230 |
| 8600 GT | 32 | 8 | 540MHz | 1.19GHz | 1.4GHz | 128bit | 256MB | $150 - $160 |
| 8500 GT | 16 | 4 | 450MHz | 900MHz | 800MHz | 128bit | 256MB / 512MB | $89 - $129 |
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mostlyprudent - Monday, May 14, 2007 - link
Frankly, neither the NVIDIA nor the AMD part at this price point is all that impressive an upgrade from the prior generations. We keep hearing that we will have to wait for DX10 titles to know the real performance of these cards, but I suspect that by the time DX10 titles are on the shelves we will have at least product line refreshes by both companies. Does anyone else feel like the graphics card industry is jerking our chains?johnsonx - Monday, May 14, 2007 - link
It seems pretty obvious that AMD needs a Radeon HD2900Pro to fill in the gap between the 2900XT and 2600XT. Use R600 silicon, give it 256Mb RAM with a 256-bit memory bus. Lower the clocks 15% so that power consumption will be lower, and so that chips that don't bin at full XT speeds can be used. Price at $250-$300. It would own the upper-midrange segment over the 8600GTS, and eat into the 8800GTS 320's lunch as well.GlassHouse69 - Monday, May 14, 2007 - link
If I know this, and YOU know this.... wouldnt anandtech? I see money under the table or utter stupidity at work at anand. I mean, I know that the .01+ version does a lot better in benches as well as the higher res with aa/af on sometimes get BETTER framerates than lower res, no aa/af settings. This is a driver thing. If I know this, you know this, anand must. I would rather admit to being corrupt rather than that stupid.GlassHouse69 - Monday, May 14, 2007 - link
wrong section. dt is doing that today it seems to a few peoplexfiver - Monday, May 14, 2007 - link
Hi, thank you for a really in depth review. While reading other 'earlier' reviews I remember a site using Catalyst 8.38 and reported performance improvements upto 14% from 8.37. Look forward to Anandtech's view on this.xfiver - Monday, May 14, 2007 - link
My apologies it was VR zone and 8.36 to 8.37 (not 8.38)GlassHouse69 - Monday, May 14, 2007 - link
If I know this, and YOU know this.... wouldnt anandtech? I see money under the table or utter stupidity at work at anand. I mean, I know that the .01+ version does a lot better in benches as well as the higher res with aa/af on sometimes get BETTER framerates than lower res, no aa/af settings. This is a driver thing. If I know this, you know this, anand must. I would rather admit to being corrupt rather than that stupid.Gary Key - Tuesday, May 15, 2007 - link
I have worked extensively with four 8.37 releases and now the 8.38 release for the upcoming P35 release article. The 8.37.4.2 alpha driver had the top performance in SM3.0 heavy apps but was not very stable with numerous games, especially under Vista. The released 8.37.4.3 driver on AMD's website is the most stable driver to date and has decent performance but nothing near the alpha 8.37 or beta 8.38. The 8.38s offer great benchmark performance in the 3DMarks, several games, and a couple of DX10 benchmarks from AMD.
However, the 8.38s more or less broke CrossFire, OpenGL, and video acceleration in Vista depending upon the app and IQ is not always perfect. While there is a great deal of promise in their performance and we see the potential, they are still Beta drivers that have a long ways to go in certain areas before their final release date of 5/23 (internal target).
That said, would you rather see impressive results in 3DMarks or have someone tell you the truth about the development progress or lack of it with the drivers. As much as I would like to see this card's performance improve immediately, it is what it is at this time with the released drivers. AMD/ATI will improve the performance of the card with better drivers but until they are released our only choice is to go with what they sent. We said the same thing about NVIDIA's early driver issues with the G80 so there are not any fanboys or people taking money under the table around here. You can put all the lipstick on a pig you want, but in the end, you still have a pig. ;-)
Anand Lal Shimpi - Monday, May 14, 2007 - link
There's nothing sinister going on, ATI gave us 8.37 to test with and told us to use it. We got 8.38 today and are currently testing it for a follow-up.Take care,
Anand
GlassHouse69 - Monday, May 14, 2007 - link
wow dood. you replied!Yes, I have been wondering about the ethics of your group here for about a year now. I felt this sorta slick leaning towards and masking thing goign on. Nice to see there is not.
Thanks for the 1000's of articles and tests!
-Mr. Glass