GeForce GT 430 vs Radeon HD 4750

Intro

Compare that to the Radeon HD 4750, which features core clock 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 430		60 Watts
Radeon HD 4750		75 Watts
	Difference: 15 Watts (25%)

Memory Bandwidth

In theory, the Radeon HD 4750 should be 78% quicker than the GeForce GT 430 in general, due to its greater data rate. (explain)

Radeon HD 4750		51200 MB/sec
GeForce GT 430		28800 MB/sec
	Difference: 22400 (78%)

Texel Rate

The Radeon HD 4750 will be much (more or less 109%) better at texture filtering than the GeForce GT 430. (explain)

Radeon HD 4750		23360 Mtexels/sec
GeForce GT 430		11200 Mtexels/sec
	Difference: 12160 (109%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 4750 is the winner, by far. (explain)

Radeon HD 4750		11680 Mpixels/sec
GeForce GT 430		2800 Mpixels/sec
	Difference: 8880 (317%)

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 maximum amount of data (counted in megabytes per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many 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.