GeForce GT 320 vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which features a clock frequency of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It features 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon HD 5770		108 Watts
	Difference: 65 Watts (151%)

Memory Bandwidth

In theory, the Radeon HD 5770 is 204% faster than the GeForce GT 320 overall, because of its higher data rate. (explain)

Radeon HD 5770		76800 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 51520 (204%)

Texel Rate

The Radeon HD 5770 will be quite a bit (more or less 162%) faster with regards to AF than the GeForce GT 320. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 21040 (162%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 5770 is superior to the GeForce GT 320, by a large margin. (explain)

Radeon HD 5770		13600 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 9280 (215%)

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 data (in units of megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 can be processed per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.