GeForce GT 340 1GB vs Radeon R5 M255

Intro

Compare those specs to the Radeon R5 M255, which features a clock speed of 940 MHz and a DDR3 memory speed of 1000 MHz. It also uses a 64-bit memory bus, and makes use of a 28 nm design. It is comprised of 320 SPUs, 20 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce GT 340 1GB should in theory be a lot superior to the Radeon R5 M255 overall. (explain)

GeForce GT 340 1GB		54400 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 38400 (240%)

Texel Rate

The Radeon R5 M255 will be just a bit (approximately 7%) more effective at texture filtering than the GeForce GT 340 1GB. (explain)

Radeon R5 M255		18800 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 1200 (7%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R5 M255 is the winner, by a large margin. (explain)

Radeon R5 M255		7520 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 3120 (71%)

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 maximum amount of information (in units of MB per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.