GeForce GT 340 vs Radeon HD 7850

Intro

Compare that to the Radeon HD 7850, which comes with GPU clock speed of 860 MHz, and 2048 MB of GDDR5 RAM running at 1200 MHz through a 256-bit bus. It also is comprised of 1024 Stream Processors, 64 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
Radeon HD 7850		130 Watts
	Difference: 61 Watts (88%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7850 should perform a lot faster than the GeForce GT 340 in general. (explain)

Radeon HD 7850		153600 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 99200 (182%)

Texel Rate

The Radeon HD 7850 will be much (about 213%) better at texture filtering than the GeForce GT 340. (explain)

Radeon HD 7850		55040 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 37440 (213%)

Pixel Rate

The Radeon HD 7850 is a lot (more or less 525%) faster with regards to FSAA than the GeForce GT 340, and also capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 7850		27520 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 23120 (525%)

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 (measured in MB per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the 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 core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.