GeForce 8400 GS 512MB vs Radeon R9 M295X

Intro

Compare those specs to the Radeon R9 M295X, which features GPU core speed of 750 MHz, and 4096 MB of GDDR5 memory set to run at 1375 MHz through a 256-bit bus. It also is comprised of 2048 Stream Processors, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8400 GS 512MB		40 Watts
Radeon R9 M295X		125 Watts
	Difference: 85 Watts (213%)

Memory Bandwidth

Performance-wise, the Radeon R9 M295X should in theory be quite a bit better than the GeForce 8400 GS 512MB in general. (explain)

Radeon R9 M295X		176000 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 169600 (2650%)

Texel Rate

The Radeon R9 M295X should be much (more or less 1746%) faster with regards to texture filtering than the GeForce 8400 GS 512MB. (explain)

Radeon R9 M295X		96000 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 90800 (1746%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 M295X is a better choice, and very much so. (explain)

Radeon R9 M295X		24000 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 21400 (823%)

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 information (measured in megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 again. If 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, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines 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 rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.