GeForce GTX 750 vs Radeon HD 4850 1GB

Intro

Compare that to the Radeon HD 4850 1GB, which features core clock speeds of 625 MHz on the GPU, and 993 MHz on the 1024 MB of GDDR4 RAM. 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 GTX 750		55 Watts
Radeon HD 4850 1GB		110 Watts
	Difference: 55 Watts (100%)

Memory Bandwidth

Theoretically, the GeForce GTX 750 should perform quite a bit faster than the Radeon HD 4850 1GB overall. (explain)

GeForce GTX 750		80000 MB/sec
Radeon HD 4850 1GB		63552 MB/sec
	Difference: 16448 (26%)

Texel Rate

The GeForce GTX 750 will be much (more or less 31%) better at anisotropic filtering than the Radeon HD 4850 1GB. (explain)

GeForce GTX 750		32640 Mtexels/sec
Radeon HD 4850 1GB		25000 Mtexels/sec
	Difference: 7640 (31%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 750 is superior to the Radeon HD 4850 1GB, and very much so. (explain)

GeForce GTX 750		16320 Mpixels/sec
Radeon HD 4850 1GB		10000 Mpixels/sec
	Difference: 6320 (63%)

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 information (in units of megabytes per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling 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 write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.