GeForce GT 320 vs Radeon HD 4750

Intro

Compare those specifications to the Radeon HD 4750, which has core speeds of 730 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon HD 4750		75 Watts
	Difference: 32 Watts (74%)

Memory Bandwidth

The Radeon HD 4750, in theory, should be much faster than the GeForce GT 320 in general. (explain)

Radeon HD 4750		51200 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 25920 (103%)

Texel Rate

The Radeon HD 4750 should be a lot (more or less 80%) faster with regards to texture filtering than the GeForce GT 320. (explain)

Radeon HD 4750		23360 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 10400 (80%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 4750 is superior to the GeForce GT 320, by a large margin. (explain)

Radeon HD 4750		11680 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 7360 (170%)

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 (counted in MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it should 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 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 number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling 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 that the graphics card could possibly write to the 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 - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.