GeForce GT 340 1GB vs Radeon HD 7750

Intro

Compare those specifications to the Radeon HD 7750, which features GPU clock speed of 800 MHz, and 1024 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also is made up of 512 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 7750		55 Watts
GeForce GT 340 1GB		69 Watts
	Difference: 14 Watts (25%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7750 will be 32% quicker than the GeForce GT 340 1GB overall, due to its greater bandwidth. (explain)

Radeon HD 7750		72000 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 17600 (32%)

Texel Rate

The Radeon HD 7750 is a lot (about 45%) more effective at AF than the GeForce GT 340 1GB. (explain)

Radeon HD 7750		25600 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 8000 (45%)

Pixel Rate

The Radeon HD 7750 is quite a bit (more or less 191%) better at anti-aliasing than the GeForce GT 340 1GB, and able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 7750		12800 Mpixels/sec
GeForce GT 340 1GB		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: Bandwidth is the largest amount of data (counted in megabytes per second) that can be moved over 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 type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. 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 ability to reach the max fill rate.