Multi-sample anti-aliasing (2, 4 or 8 samples per pixel).Memory read/write cache for improved stream output performance.Accelerated geometry shader path for geometry amplification.8 render targets (MRTs) with anti-aliasing support.Lossless color compression (up to 8:1).Lossless Z & stencil compression (up to 128:1).Early Z test, Re-Z, Z Range optimization, and Fast Z Clear.Double-sided hierarchical Z/stencil buffer.Fully associative texture Z/stencil cache designs.High resolution texture support (up to 8192 x 8192).Fully associative multi-level texture cache design.
Up to 160 texture fetches per clock cycle.Shader instruction and constant caches.Command processor for reduced CPU overhead.128-bit floating point precision for all operations.Dedicated branch execution units and texture address processors.Common instruction set and texture unit access supported for all types of shaders.Dynamic load balancing and resource allocation for vertex, geometry, and pixel shaders.Read/write multi-sample surfaces with shaders.Independent blend modes per render target.32-bit floating point texture filtering.956 million transistors on 55nm fabrication process.Read on to see how the XOC fared in the comparison. Speaking of the labs, we took the XOC for a spin with our benchmark suite and pitted it against a reference 4870 X2, an NVIDIA GeForce GTX 285, an NVIDIA GeForce GTX 295, and a pair of GeForce GTX 285s in SLI. We are happy to report that Diamond boosted the XOC's clocks to 800 MHz and 950 MHz, respectively, making this one of the fastest 4870 X2 cards we've seen in the HotHardware labs. The reference GPU clock speed for the 4870 X2 is 750 MHz, and the reference memory speed is 900 MHz. As you probably already know, the Radeon HD 4870 X2 employs two RV770 GPUs, each of which is complemented by 1GB of GDDR5 memory (for a total of 2GB frame buffer memory). So, it goes without saying that we were excited to check out Diamond's overclocked Radeon HD 4870 X2 XOC graphics card (model number: 4870X2PE52GXOC). And when a company combines the two, that's just fine in our book. If you are a regular reader, you probably already know we are fans of dual GPU video cards, and we have a strong affinity for factory overclocked video cards as well. Right up there with peanut butter and jelly, Mario and Luigi, milk and cookies, we'd like to add dual GPUs and factory overclocks. We like a good combo here at HotHardware, and we have a new one to add to the list.
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