GeForce GTX 465 vs Radeon HD 5770

Intro

Compare those specifications to the Radeon HD 5770, which comes with core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
GeForce GTX 465		200 Watts
	Difference: 92 Watts (85%)

Memory Bandwidth

Theoretically, the GeForce GTX 465 should perform much faster than the Radeon HD 5770 overall. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 25792 (34%)

Texel Rate

The Radeon HD 5770 will be much (more or less 27%) faster with regards to anisotropic filtering than the GeForce GTX 465. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 7292 (27%)

Pixel Rate

The GeForce GTX 465 should be a lot (approximately 43%) faster with regards to full screen anti-aliasing than the Radeon HD 5770, and should be capable of handling higher resolutions better. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 5824 (43%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.