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GeForce 8400 GS 512MB vs Radeon R9 M295X

Intro

The GeForce 8400 GS 512MB makes use of a 80 nm design. nVidia has set the core speed at 650 MHz. The DDR2 RAM is set to run at a speed of 400 MHz on this particular model. It features 16 SPUs along with 8 TAUs and 4 Rasterization Operator Units.

Compare all that to the Radeon R9 M295X, which comes with 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 made up of 2048 Stream Processors, 128 TAUs, and 32 Raster Operation Units.

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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

Theoretically, the Radeon R9 M295X should be quite a bit faster 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 is a lot (approximately 1746%) better at 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, by a large margin. (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

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GeForce 8400 GS 512MB

Amazon.com

Check prices at:

Radeon R9 M295X

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce 8400 GS 512MB Radeon R9 M295X
Manufacturer nVidia AMD
Year June 2007 2014
Code Name G86 Unknown
Memory 512 MB 4096 MB
Core Speed 650 MHz 750 MHz
Memory Speed 800 MHz 5500 MHz
Power (Max TDP) 40 watts 125 watts
Bandwidth 6400 MB/sec 176000 MB/sec
Texel Rate 5200 Mtexels/sec 96000 Mtexels/sec
Pixel Rate 2600 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 16 2048
Texture Mapping Units 8 128
Render Output Units 4 32
Bus Type DDR2 GDDR5
Bus Width 64-bit 256-bit
Fab Process 80 nm 28 nm
Transistors 210 million (Unknown) million
Bus PCIe x16, PCI PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can 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 - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce 8400 GS 512MB

Amazon.com

Check prices at:

Radeon R9 M295X

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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