GeForce GT 320 vs Radeon HD 5770

Intro

Compare that to the Radeon HD 5770, which has a GPU core clock speed of 850 MHz, and 1024 MB of GDDR5 memory set to run at 1200 MHz through a 128-bit bus. It also is made up of 800(160x5) Stream Processors, 40 TAUs, 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

Performance-wise, the Radeon HD 5770 should in theory be a lot superior to 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 should 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

The Radeon HD 5770 is quite a bit (more or less 215%) better at anti-aliasing than the GeForce GT 320, and also will be capable of handling higher screen resolutions more effectively. (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 maximum amount of information (measured in MB per second) that can be moved 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 type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units by the core clock 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.