GeForce GT 340 1GB vs Radeon R5 M255

Intro

Compare those specifications to the Radeon R5 M255, which comes with core speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 320 SPUs as well as 20 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GT 340 1GB, in theory, should perform a lot faster than 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 is a little bit (approximately 7%) better at AF 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 using lots of anti-aliasing is important to you, then the Radeon R5 M255 is superior to the GeForce GT 340 1GB, and very much so. (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 max amount of data (measured in MB per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher 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 the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.