GeForce GT 340 vs Radeon R9 270X

Intro

Compare those specs to the Radeon R9 270X, which makes use of a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 RAM runs at a speed of 1400 MHz on this specific model. It features 1280 SPUs along with 80 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 R9 270X		180 Watts
	Difference: 111 Watts (161%)

Memory Bandwidth

In theory, the Radeon R9 270X will be 229% faster than the GeForce GT 340 overall, because of its greater bandwidth. (explain)

Radeon R9 270X		179200 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 124800 (229%)

Texel Rate

The Radeon R9 270X should be quite a bit (about 355%) better at texture filtering than the GeForce GT 340. (explain)

Radeon R9 270X		80000 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 62400 (355%)

Pixel Rate

The Radeon R9 270X is quite a bit (more or less 627%) more effective at AA than the GeForce GT 340, and will be capable of handling higher resolutions better. (explain)

Radeon R9 270X		32000 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 27600 (627%)

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 maximum amount of data (in units of megabytes per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.