GeForce GTS 450 vs Radeon R5 M255

Intro

Compare those specifications to the Radeon R5 M255, which has GPU core speed of 940 MHz, and 2048 MB of DDR3 RAM set to run at 1000 MHz through a 64-bit bus. It also features 320 Stream Processors, 20 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GTS 450 will be 261% quicker than the Radeon R5 M255 overall, because of its higher data rate. (explain)

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

Texel Rate

The GeForce GTS 450 will be much (approximately 33%) faster with regards to AF than the Radeon R5 M255. (explain)

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

Pixel Rate

The GeForce GTS 450 will be a lot (about 67%) faster with regards to full screen anti-aliasing than the Radeon R5 M255, and able to handle higher screen resolutions without slowing down too much. (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 max amount of information (measured in megabytes per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.