GeForce GT 320 vs Radeon HD 4750

Intro

Compare those specs to the Radeon HD 4750, which comes with a GPU core clock speed of 730 MHz, and 512 MB of GDDR5 memory running at 800 MHz through a 128-bit bus. It also is made up of 640(128x5) SPUs, 32 TAUs, 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 4750		75 Watts
	Difference: 32 Watts (74%)

Memory Bandwidth

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

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

Texel Rate

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

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

Pixel Rate

The Radeon HD 4750 should be quite a bit (approximately 170%) more effective at FSAA than the GeForce GT 320, and also able to handle higher screen resolutions while still performing well. (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: Memory bandwidth is the max amount of data (measured in MB per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

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