GeForce GT 340 vs Radeon HD 7750

Intro

Compare all that to the Radeon HD 7750, which comes with GPU core speed of 800 MHz, and 1024 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also features 512 SPUs, 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 GT 340		69 Watts
	Difference: 14 Watts (25%)

Memory Bandwidth

The Radeon HD 7750 should theoretically be much faster than the GeForce GT 340 overall. (explain)

Radeon HD 7750		72000 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 17600 (32%)

Texel Rate

The Radeon HD 7750 is quite a bit (approximately 45%) more effective at AF than the GeForce GT 340. (explain)

Radeon HD 7750		25600 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 8000 (45%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 7750 is the winner, and very much so. (explain)

Radeon HD 7750		12800 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 8400 (191%)

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 data (in units of megabytes per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, the result 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 AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics 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 maximum number of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka 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, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.