GeForce GTX 480 vs Radeon HD 5770

Intro

Compare all that to the Radeon HD 5770, which comes with clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
GeForce GTX 480		250 Watts
	Difference: 142 Watts (131%)

Memory Bandwidth

In theory, the GeForce GTX 480 should be 131% quicker than the Radeon HD 5770 overall, due to its higher bandwidth. (explain)

GeForce GTX 480		177408 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 100608 (131%)

Texel Rate

The GeForce GTX 480 will be much (more or less 24%) better at AF than the Radeon HD 5770. (explain)

GeForce GTX 480		42000 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 8000 (24%)

Pixel Rate

The GeForce GTX 480 should be much (more or less 147%) faster with regards to FSAA than the Radeon HD 5770, and will be able to handle higher resolutions more effectively. (explain)

GeForce GTX 480		33600 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 20000 (147%)

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: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.