GeForce GT 430 (OEM) vs Radeon HD 4850 X2 1GB

Intro

Compare those specs to the Radeon HD 4850 X2 1GB, which has GPU clock speed of 625 MHz, and 1024 MB of GDDR3 RAM set to run at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 430 (OEM)		60 Watts
Radeon HD 4850 X2 1GB		250 Watts
	Difference: 190 Watts (317%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4850 X2 1GB will be 341% quicker than the GeForce GT 430 (OEM) overall, due to its higher data rate. (explain)

Radeon HD 4850 X2 1GB		127104 MB/sec
GeForce GT 430 (OEM)		28800 MB/sec
	Difference: 98304 (341%)

Texel Rate

The Radeon HD 4850 X2 1GB should be a lot (more or less 346%) better at texture filtering than the GeForce GT 430 (OEM). (explain)

Radeon HD 4850 X2 1GB		50000 Mtexels/sec
GeForce GT 430 (OEM)		11200 Mtexels/sec
	Difference: 38800 (346%)

Pixel Rate

The Radeon HD 4850 X2 1GB will be a lot (about 614%) more effective at FSAA than the GeForce GT 430 (OEM), and will be capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 4850 X2 1GB		20000 Mpixels/sec
GeForce GT 430 (OEM)		2800 Mpixels/sec
	Difference: 17200 (614%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's 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 amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.