GeForce GT 340 1GB vs Radeon R9 285

Intro

Compare that to the Radeon R9 285, which comes with a core clock speed of 918 MHz and a GDDR5 memory speed of 1375 MHz. It also features a 256-bit bus, and uses a 28 nm design. It is made up of 1792 SPUs, 112 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
Radeon R9 285		190 Watts
	Difference: 121 Watts (175%)

Memory Bandwidth

Performance-wise, the Radeon R9 285 should in theory be quite a bit superior to the GeForce GT 340 1GB overall. (explain)

Radeon R9 285		176000 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 121600 (224%)

Texel Rate

The Radeon R9 285 is much (approximately 484%) faster with regards to texture filtering than the GeForce GT 340 1GB. (explain)

Radeon R9 285		102816 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 85216 (484%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 285 is a better choice, by far. (explain)

Radeon R9 285		29376 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 24976 (568%)

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 max amount of data (counted in megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. 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 texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the 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 its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. 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 many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.