GeForce GTX 470 vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which features 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 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 470		215 Watts
	Difference: 107 Watts (99%)

Memory Bandwidth

Performance-wise, the GeForce GTX 470 should in theory be quite a bit better than the Radeon HD 5770 in general. (explain)

GeForce GTX 470		133920 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 57120 (74%)

Texel Rate

The Radeon HD 5770 is a small bit (more or less 0%) more effective at AF than the GeForce GTX 470. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce GTX 470		33992 Mtexels/sec
	Difference: 8 (0%)

Pixel Rate

The GeForce GTX 470 will be much (about 79%) more effective at full screen anti-aliasing than the Radeon HD 5770, and also able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 470		24280 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 10680 (79%)

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 maximum amount of data (in units of MB per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the card's 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 fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.