GeForce 8400 GS 512MB vs Radeon R7 M265

Intro

Compare those specifications to the Radeon R7 M265, which features clock speeds of 725 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 384 SPUs along with 24 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R7 M265 should theoretically be much better than the GeForce 8400 GS 512MB in general. (explain)

Radeon R7 M265		32000 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 25600 (400%)

Texel Rate

The Radeon R7 M265 will be a lot (more or less 235%) more effective at anisotropic filtering than the GeForce 8400 GS 512MB. (explain)

Radeon R7 M265		17400 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 12200 (235%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R7 M265 is superior to the GeForce 8400 GS 512MB, by a large margin. (explain)

Radeon R7 M265		5800 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 3200 (123%)

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 data (measured in MB per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total amount of texture units by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated 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 filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.