GeForce 8400 GS 512MB vs Radeon R9 M375X

Intro

Compare those specs to the Radeon R9 M375X, which has a clock speed of 1015 MHz and a GDDR5 memory speed of 1125 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It features 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R9 M375X should theoretically be much better than the GeForce 8400 GS 512MB in general. (explain)

Radeon R9 M375X		72000 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 65600 (1025%)

Texel Rate

The Radeon R9 M375X is much (approximately 681%) faster with regards to texture filtering than the GeForce 8400 GS 512MB. (explain)

Radeon R9 M375X		40600 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 35400 (681%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 M375X is superior to the GeForce 8400 GS 512MB, by far. (explain)

Radeon R9 M375X		16240 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 13640 (525%)

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 information (measured in MB per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher 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 texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip 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 ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill 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 ability to get to the maximum fill rate.