GeForce GTS 450 vs Radeon R5 M255

Intro

Compare that to the Radeon R5 M255, which has a core clock frequency of 940 MHz and a DDR3 memory frequency of 1000 MHz. It also features a 64-bit 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

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTS 450 should theoretically perform a lot faster than the Radeon R5 M255 overall. (explain)

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

Texel Rate

The GeForce GTS 450 should be much (more or less 33%) faster with regards to 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 running with a high resolution is important to you, then the GeForce GTS 450 is the winner, by a large margin. (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: Bandwidth is the maximum amount of information (in units of MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

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