GeForce GT 240 GDDR5 1GB vs Radeon R5 M255

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce GT 240 GDDR5 1GB should theoretically be a lot better than the Radeon R5 M255 in general. (explain)

GeForce GT 240 GDDR5 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%) faster with regards to anisotropic filtering than the GeForce GT 240 GDDR5 1GB. (explain)

Radeon R5 M255		18800 Mtexels/sec
GeForce GT 240 GDDR5 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 240 GDDR5 1GB, and very much so. (explain)

Radeon R5 M255		7520 Mpixels/sec
GeForce GT 240 GDDR5 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: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.