GeForce GTS 450 vs Radeon R5 M255

Intro

Compare those specifications to the Radeon R5 M255, which makes use of a 28 nm design. AMD has set the core speed at 940 MHz. The DDR3 RAM runs at a frequency of 1000 MHz on this particular model. It features 320 SPUs along with 20 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce GTS 450 should theoretically be a lot better than the Radeon R5 M255 in general. (explain)

GeForce GTS 450		57728 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 41728 (261%)

Texel Rate

The GeForce GTS 450 will be quite a bit (about 33%) better at anisotropic filtering than the Radeon R5 M255. (explain)

GeForce GTS 450		25056 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 6256 (33%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTS 450 is superior to the Radeon R5 M255, and very much so. (explain)

GeForce GTS 450		12528 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 5008 (67%)

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 MB per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, 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 high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the 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 that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). 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 ability to reach the maximum fill rate.