GeForce GTS 450 vs Radeon HD 4750

Intro

Compare that to the Radeon HD 4750, which comes with a GPU core clock speed of 730 MHz, and 512 MB of GDDR5 RAM set to run at 800 MHz through a 128-bit bus. It also is comprised of 640(128x5) Stream Processors, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750		75 Watts
GeForce GTS 450		106 Watts
	Difference: 31 Watts (41%)

Memory Bandwidth

Performance-wise, the GeForce GTS 450 should theoretically be just a bit superior to the Radeon HD 4750 overall. (explain)

GeForce GTS 450		57728 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 6528 (13%)

Texel Rate

The GeForce GTS 450 will be a bit (about 7%) faster with regards to texture filtering than the Radeon HD 4750. (explain)

GeForce GTS 450		25056 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 1696 (7%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTS 450 is the winner, but it probably won't make a huge difference. (explain)

GeForce GTS 450		12528 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 848 (7%)

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 (measured in MB per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total number of texture units of the card 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 record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.