GeForce GTX 460 2GB vs Radeon HD 5770

Intro

Compare those specifications to the Radeon HD 5770, which uses a 40 nm design. AMD has set the core speed at 850 MHz. The GDDR5 memory runs at a frequency of 1200 MHz on this specific model. 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 460 2GB		160 Watts
	Difference: 52 Watts (48%)

Memory Bandwidth

In theory, the GeForce GTX 460 2GB is 50% quicker than the Radeon HD 5770 in general, due to its higher bandwidth. (explain)

GeForce GTX 460 2GB		115200 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 38400 (50%)

Texel Rate

The GeForce GTX 460 2GB should be just a bit (about 11%) more effective at anisotropic filtering than the Radeon HD 5770. (explain)

GeForce GTX 460 2GB		37800 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 3800 (11%)

Pixel Rate

The GeForce GTX 460 2GB should be a lot (about 59%) faster with regards to full screen anti-aliasing than the Radeon HD 5770, and also capable of handling higher screen resolutions better. (explain)

GeForce GTX 460 2GB		21600 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 8000 (59%)

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 maximum amount of information (measured in MB per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 can be processed per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. 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 output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.