GeForce GT 320 vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which has GPU clock speed of 850 MHz, and 1024 MB of GDDR5 RAM running at 1200 MHz through a 128-bit bus. It also features 800(160x5) Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

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 should perform quite a bit faster than the GeForce GT 320 overall. (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 (about 162%) better at 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 the winner, and very much so. (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: Bandwidth is the largest amount of information (measured in MB per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.