GeForce GTX 280 vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which uses a 40 nm design. AMD has set the core speed at 850 MHz. The GDDR5 RAM is set to run at a speed of 1200 MHz on this specific card. It features 800(160x5) SPUs along with 40 TAUs 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 280		236 Watts
	Difference: 128 Watts (119%)

Memory Bandwidth

In theory, the GeForce GTX 280 should be 85% faster than the Radeon HD 5770 in general, 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 (approximately 42%) more effective at 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

If using a high resolution is important to you, then the GeForce GTX 280 is superior to the Radeon HD 5770, and very much so. (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 megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 number of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.