With considerably more power at its disposal, the big brother R600 handles these jobs in its shader core. (Despite AMD’s initial hints to the contrary, the Radeon HD 2900 XT lacks UVD acceleration logic.) The lower-end Radeon HDs also feature hardware acceleration of deinterlacing, vertical and horizontal scaling, and color correction. UVD handles key portions of the decoding process for high-def codecs like H.264 and VC-1, lowering the CPU burden during playback of HD DVD and Blu-ray movies.
AMD has packaged up these video playback features under the marketing name “Avivo HD.” The most prominent of them is a facility AMD has dubbed UVD, for universal video decoder. And for you true propellerheads, these GPUs offer a more complete implementation of floating-point datatypes, with mathematical precision that largely meets the requirements of the IEEE 754 spec.īeyond the 3D graphics stuff, RV610 and RV630 pack some HD video playback capabilities that they didn’t inherit from the R600. Each of the five arithmetic logic units (ALUs) in this superscalar unit can execute a separate instruction, leading AMD to count them as five “stream processors.” In theory, this architecture ought to make RV610 and RV630 more efficient than their immediate predecessors in the Radeon X1300 and X1650 series.Īs DirectX 10-compliant GPUs, these R600 derivatives can perform a number of helpful new tricks, including streaming data out of the shader core-a modification of the traditional graphics pipeline needed to enable DX10’s geometry shader capability. AMD’s new five-wide execution unit is the basic building block of this shader engine. The RV610 and RV630 share the R600’s unified shader architecture, which dynamically deploys on-chip computational resources to address the most pressing graphics problem at hand, whether it be for pixel shading or vertex processing and manipulation. The two new chips with which we’re concerned today are derivates of R600, GPUs largely based on the same internal logic but scaled back with less internal parallelism to make smaller, cheaper chips. Go read that review if you want to know more about the core tech. We covered the basic R600-series technology then, and I’ll try to avoid repeating myself here. We first reviewed the R600 when it launched back in May as the Radeon HD 2900 XT. Keep reading for our take on the new low-end and mid-range Radeons.ĪMD’s family of DirectX 10-class graphics processors is comprised of a trio of GPUs, the R600, RV630, and RV610. We also have a 3D graphics performance comparison, complete with some thoughts about why ATI’s new GPUs tend to fall short of expectations in that department. The result isn’t perfect by any means (as we are keenly aware), but we do have a number of intriguing things to offer, including a look at the new Radeon HD cards’ Avivo HD video acceleration capabilities, with tests of CPU utilization, image quality, and power use during playback. We had to get things tested to our satisfaction.Īt last, I’m pleased to report, our review is complete. But I was also held back from producing a review by the same borderline obsessive-compulsive impulse that drives us to produce detailed reviews with extensive test results and commentary. I offered various excuses, including word of a small fire in Damage Labs and limited time with the cards themselves, all of which were true-and dramatic, which really helps sell an excuse.
To download and install the AMD ATI Radeon HD 2400 XT :componentName driver manually, select the right option from the list below.AMD FINALLY PULLED BACK the curtain on the remainder of its DirectX 10 GPU lineup recently, and we, erm, kinda stumbled on getting the review out at that time.
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