It has been a long time coming but today AMD is finally set to release its massively anticipated GPU codenamed R600 XT to the world with the official retail name of ATI Radeon HD 2900 XT. It is a hugely important part for AMD right now, who recently posted massive profit loss figures. It is counting on all these new models, along with the high-end 512MB DDR-3 DX10 part with 512-bit memory interface to kick ass and help raise revenue reports against the current range from the green GeForce team, which is selling like super hot cakes.Today AMD is launching an enthusiast part HD 2900 series with the HD 2900 XT, performance parts with the HD 2600 series including HD 2600 XT and HD 2600 PRO, along with value parts including HD 2400 XT and 2400 PRO. The HD 2600 and 2400 series have had issues of their own and you will need to wait a little longer before being able to buy these various models on shop shelves (July 1st). The HD 2900 XT will be available at most of your favorite online resellers as of today. Quantity is "not too bad" but a little on the short side with most of AMD's partners only getting between 400 – 600 units which is not that much considering the huge number of ATI fans out there. You may want to get in quick and place your order, if you are interested – some AIB companies are not sure when they will get in their next order, too.
Our focus today is solely on the HD 2900 XT 512MB GDDR-3 graphics card – it is the first GPU with a fast 512-bit memory interface but what does this mean for performance? While it is AMD's top model right now, it is actually priced aggressively at around the US$350 - US$399 mark in United States, which puts it price wise up against Nvidia's GeForce 8800 GTS 640MB. After taking a look at the GPU and the card from PowerColor as well as some new Ruby DX10 screenshots, we will move onto the benchmarks and compare the red hot flaming Radeon monster against Nvidia's GeForce 8800 GTX along with the former ATI GPU king, the Radeon X1950 XTX.
Due to limited availability as well as the fact press in different regions are getting priority over others, we tested an actual retail graphics card from PowerColor. It has the same clock speeds as all other reference cards floating around – 742MHz core clock and 512MB of GDDR-3 memory clocked at 828MHz or 1656MHz DDR.
The PowerColor PCI Express x16 card looks just the same as reference cards. Later on you will see more expensive water cooled HD 2900 XT models from the usual suspects along with overclocked models in the following weeks. We did not get time to perform any overclocking tests but reports are floating around that the core is good to at least 800 - 850MHz and the GDDR-3 memory more than likely has room to increase. You may even see some companies produce HD 2900 XT OC models which use 1GB of faster GDDR-4 memory operating at over 2
000MHz DDR or they will use special cooling to get the most out of the default setup.
As far as size goes, the HD 2900 XT is a little longer than the Radeon X1950 XTX but a good deal shorter than the GeForce 8800 GTX, as you can see from the shot above with the PowerColor HD 2900 XT sitting in the middle of the group. Both of the other cards take up two slots and the HD 2900 XT is no different.
In 2D mode (non-gaming in Windows), the clock speeds are automatically throttled back to 506MHz on the core and 1026MHz DDR on the memory. This is done to reduce power consumption and also to reduce temperatures, which seems to pretty important for the HD 2900 XT.
We expect factory overclocked HD 2900 XT cards to start selling in less than one month from now. AIB partners currently have the option of ordering 1GB GDDR-4 models with faster clock speeds but it is unsure if this product will be called HD 2900 XT 1GB GDDR-4 or HD 2900 XTX – you may end up seeing these types of cards appear in early June (around Computex Taipei show time). If we saw a product like this with slightly faster core clock and obviously much faster memory clock (2000 - 2100MHz DDR vs. 1656MHz DDR), we think it would compete very nicely against the GeForce 8800 GTX as far as price vs. performance goes. Sadly we did not have a GeForce 8800 GTS 640MB handy for testing but matching up with our previous testing on similar test beds, the HD 2900 XT will beat it quite considerably, by around the 20% mark in 3DMark06, for example. This is rather interesting since the HD 2900 XT is in the same price range as the GeForce 8800 GTS 640MB – we will test against this card shortly!
Summing it up, we are happy to see a new high-end Radeon graphics card from AMD – it literally is the red hot flaming monster but it manages to offer a good amount of performance and impressive feature set with full DX10 and Shader Model 4.0, Crossfire and Windows Vista support and a host of others which we did not even have enough time to cover in full today, such as improved anti-aliasing and UVD. It was a long time coming but it is able to offer very good bang for buck against the equivalent from Nvidia - GeForce 8800 GTS.
It is also something for the green team to think about if AMD comes out with a faster version of R600 XT either with faster operating GDDR-4 memory (and more of it) or faster clock speeds using 65nm processor technology, later in the year. Interesting times ahead in the GPU business but for right now the Radeon HD 2900 XT offers very solid performance for the price but we will be more interested in what is coming in the following weeks as overclocked versions emerge and shake things up even more.
