GeForce GT 430 (OEM) vs Radeon HD 7750

Intro

Compare all that to the Radeon HD 7750, which comes with GPU clock speed of 800 MHz, and 1024 MB of GDDR5 RAM set to run at 1125 MHz through a 128-bit bus. It also features 512 SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
GeForce GT 430 (OEM)		60 Watts
	Difference: 5 Watts (9%)

Memory Bandwidth

Performance-wise, the Radeon HD 7750 should in theory be much better than the GeForce GT 430 (OEM) overall. (explain)

Radeon HD 7750		72000 MB/sec
GeForce GT 430 (OEM)		28800 MB/sec
	Difference: 43200 (150%)

Texel Rate

The Radeon HD 7750 should be much (more or less 129%) more effective at texture filtering than the GeForce GT 430 (OEM). (explain)

Radeon HD 7750		25600 Mtexels/sec
GeForce GT 430 (OEM)		11200 Mtexels/sec
	Difference: 14400 (129%)

Pixel Rate

The Radeon HD 7750 will be a lot (about 357%) faster with regards to AA than the GeForce GT 430 (OEM), and also should be capable of handling higher resolutions while still performing well. (explain)

Radeon HD 7750		12800 Mpixels/sec
GeForce GT 430 (OEM)		2800 Mpixels/sec
	Difference: 10000 (357%)

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 (counted in MB per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once 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 anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better 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 maximum number of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number 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 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 max fill rate.