GeForce 8400 GS 512MB vs Radeon R9 M295X

Intro

Compare those specs to the Radeon R9 M295X, which features core speeds of 750 MHz on the GPU, and 1375 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

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

As far as performance goes, the Radeon R9 M295X should in theory be a lot superior to 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 a lot (about 1746%) faster with regards to anisotropic 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

The Radeon R9 M295X is a lot (approximately 823%) faster with regards to anti-aliasing than the GeForce 8400 GS 512MB, and should be able to handle higher screen resolutions while still performing well. (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 maximum amount of data (measured in megabytes per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.