GeForce 8800 GT 256MB vs Radeon R5 M255

Intro

Compare those specifications to the Radeon R5 M255, which comes with 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 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce 8800 GT 256MB should perform much faster than the Radeon R5 M255 overall. (explain)

GeForce 8800 GT 256MB		44800 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 28800 (180%)

Texel Rate

The GeForce 8800 GT 256MB will be much (approximately 79%) faster with regards to AF than the Radeon R5 M255. (explain)

GeForce 8800 GT 256MB		33600 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 14800 (79%)

Pixel Rate

The GeForce 8800 GT 256MB is a lot (approximately 28%) better at FSAA than the Radeon R5 M255, and capable of handling higher screen resolutions while still performing well. (explain)

GeForce 8800 GT 256MB		9600 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 2080 (28%)

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 information (counted in megabytes per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, 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 the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.