This is because the shader optimizer can easily track all variables and reuse registers. An ordinary shader that contains for instance a few dozen variables will seldom consume a few dozen temporaries in the end but is likely to be optimized down to a handful depending on what the shader does. Furthermore, indexed temporaries tend to increase register pressure a lot.
The shader optimizer may not be able to identify optimizations across indexed accesses that could otherwise have been detected.
One reason is that indexed temporaries are hard to optimize. Shader Model 4.1 adds support for indexed temporaries which can be quite useful for certain tasks.Regular direct temporary access is preferable is most cases. Microsoft® DirectX® 10.1 games, with stunning 3D graphics and shading effects. The power of DirectX® 10.1 with awesome performance, stunning visual effects, and more dynamic interactivity than ever before.Ensures the best performance and application compatibility for all DirectX® 10.1 applications.
#AMD RADEON HD 3870 512MB SPECS FULL#
55nm technology helped make HD3800 series products the most advanced GPUs ever highest clocks speeds, incredible feature integration, full performance and precision all the time, and ability to take advantage of future, higher-speed memories. Features dual DVI-I / D-sub / HDMI / HDCPįaster clocks, double the transistor density of earlier 65 nm technology. Supports CrossFireX™ and Avivo™HD technology Integrated with the industry's best 512MB GDDR3 memory and 256-bit memory interface Microsoft DirectX 10.1 and OpenGL 2.0 support The official marketing text of Gigabyte Radeon HD 3850, 512MB, GDDR3, 256-bit AMD as supplied by the manufacturer
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