GeForce GTX 280 vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which has core speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs along with 40 TAUs 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 280		236 Watts
	Difference: 128 Watts (119%)

Memory Bandwidth

In theory, the GeForce GTX 280 should be 85% faster than the Radeon HD 5770 overall, because of its greater bandwidth. (explain)

GeForce GTX 280		141696 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 64896 (85%)

Texel Rate

The GeForce GTX 280 will be much (more or less 42%) faster with regards to anisotropic filtering than the Radeon HD 5770. (explain)

GeForce GTX 280		48160 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 14160 (42%)

Pixel Rate

The GeForce GTX 280 should be quite a bit (more or less 42%) faster with regards to anti-aliasing than the Radeon HD 5770, and also able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 280		19264 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 5664 (42%)

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 max amount of information (in units of MB per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.