GeForce GT 430 (OEM) vs Radeon HD 4850 512MB

Intro

Compare those specifications to the Radeon HD 4850 512MB, which has core clock speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 memory. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 430 (OEM)		60 Watts
Radeon HD 4850 512MB		110 Watts
	Difference: 50 Watts (83%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4850 512MB should be 121% faster than the GeForce GT 430 (OEM) overall, because of its greater bandwidth. (explain)

Radeon HD 4850 512MB		63552 MB/sec
GeForce GT 430 (OEM)		28800 MB/sec
	Difference: 34752 (121%)

Texel Rate

The Radeon HD 4850 512MB is quite a bit (more or less 123%) more effective at AF than the GeForce GT 430 (OEM). (explain)

Radeon HD 4850 512MB		25000 Mtexels/sec
GeForce GT 430 (OEM)		11200 Mtexels/sec
	Difference: 13800 (123%)

Pixel Rate

The Radeon HD 4850 512MB should be much (more or less 257%) better at full screen anti-aliasing than the GeForce GT 430 (OEM), and also able to handle higher screen resolutions better. (explain)

Radeon HD 4850 512MB		10000 Mpixels/sec
GeForce GT 430 (OEM)		2800 Mpixels/sec
	Difference: 7200 (257%)

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 largest amount of information (in units of MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at 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 the video card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.