GeForce 8800 GT 256MB vs Radeon R7 M265

Intro

Compare all that to the Radeon R7 M265, which has a GPU core clock speed of 725 MHz, and 2048 MB of DDR3 RAM set to run at 1000 MHz through a 128-bit bus. It also features 384 SPUs, 24 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce 8800 GT 256MB will be 40% faster than the Radeon R7 M265 overall, due to its higher bandwidth. (explain)

GeForce 8800 GT 256MB		44800 MB/sec
Radeon R7 M265		32000 MB/sec
	Difference: 12800 (40%)

Texel Rate

The GeForce 8800 GT 256MB will be quite a bit (about 93%) more effective at anisotropic filtering than the Radeon R7 M265. (explain)

GeForce 8800 GT 256MB		33600 Mtexels/sec
Radeon R7 M265		17400 Mtexels/sec
	Difference: 16200 (93%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce 8800 GT 256MB is the winner, and very much so. (explain)

GeForce 8800 GT 256MB		9600 Mpixels/sec
Radeon R7 M265		5800 Mpixels/sec
	Difference: 3800 (66%)

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 largest amount of data (counted in MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.