GeForce GT 340 vs Radeon R9 390 8G

Intro

Compare those specs to the Radeon R9 390 8G, which features core clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 memory. It features 2560 SPUs along with 160 TAUs and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
Radeon R9 390 8G		275 Watts
	Difference: 206 Watts (299%)

Memory Bandwidth

Performance-wise, the Radeon R9 390 8G should in theory be quite a bit superior to the GeForce GT 340 in general. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 329600 (606%)

Texel Rate

The Radeon R9 390 8G will be quite a bit (approximately 809%) better at anisotropic filtering than the GeForce GT 340. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 142400 (809%)

Pixel Rate

The Radeon R9 390 8G will be a lot (about 1355%) faster with regards to anti-aliasing than the GeForce GT 340, and will be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 59600 (1355%)

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 max amount of information (in units of MB per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 number is calculated by multiplying the total amount of texture units by the core 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.