GeForce GT 340 vs Radeon R9 285

Intro

Compare those specifications to the Radeon R9 285, which has core clock speeds of 918 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 RAM. It features 1792 SPUs along with 112 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically, the Radeon R9 285 should perform a lot faster than the GeForce GT 340 in general. (explain)

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

Texel Rate

The Radeon R9 285 should be a lot (more or less 484%) more effective at anisotropic filtering than the GeForce GT 340. (explain)

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

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 285 is superior to the GeForce GT 340, and very much so. (explain)

Radeon R9 285		29376 Mpixels/sec
GeForce GT 340		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: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it must 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 are processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.