GeForce GTX 275 vs Radeon HD 7750

Intro

Compare those specifications to the Radeon HD 7750, which comes with GPU clock speed of 800 MHz, and 1024 MB of GDDR5 RAM set to run at 1125 MHz through a 128-bit bus. It also features 512 Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
GeForce GTX 275		219 Watts
	Difference: 164 Watts (298%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 275 should perform much faster than the Radeon HD 7750 in general. (explain)

GeForce GTX 275		127008 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 55008 (76%)

Texel Rate

The GeForce GTX 275 is much (approximately 98%) more effective at anisotropic filtering than the Radeon HD 7750. (explain)

GeForce GTX 275		50640 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 25040 (98%)

Pixel Rate

The GeForce GTX 275 will be quite a bit (more or less 38%) faster with regards to full screen anti-aliasing than the Radeon HD 7750, and also will be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 275		17724 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 4924 (38%)

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 max amount of data (counted in MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount of texture units by the core 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 most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.