GeForce 9800 GT 1GB vs Radeon HD 5750 1GB

Intro

Compare those specifications to the Radeon HD 5750 1GB, which has a clock frequency of 700 MHz and a GDDR5 memory frequency of 1150 MHz. It also features a 128-bit memory bus, and uses a 40 nm design. It features 720(144x5) SPUs, 36 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 1GB		86 Watts
GeForce 9800 GT 1GB		105 Watts
	Difference: 19 Watts (22%)

Memory Bandwidth

Theoretically, the Radeon HD 5750 1GB should be much faster than the GeForce 9800 GT 1GB overall. (explain)

Radeon HD 5750 1GB		73600 MB/sec
GeForce 9800 GT 1GB		57600 MB/sec
	Difference: 16000 (28%)

Texel Rate

The GeForce 9800 GT 1GB is much (approximately 33%) better at texture filtering than the Radeon HD 5750 1GB. (explain)

GeForce 9800 GT 1GB		33600 Mtexels/sec
Radeon HD 5750 1GB		25200 Mtexels/sec
	Difference: 8400 (33%)

Pixel Rate

The Radeon HD 5750 1GB should be a little bit (about 17%) better at full screen anti-aliasing than the GeForce 9800 GT 1GB, and capable of handling higher screen resolutions better. (explain)

Radeon HD 5750 1GB		11200 Mpixels/sec
GeForce 9800 GT 1GB		9600 Mpixels/sec
	Difference: 1600 (17%)

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: Bandwidth is the largest amount of data (measured in MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one 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 number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.