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GeForce 8400 GS 512MB vs Radeon R9 M270X

Intro

The GeForce 8400 GS 512MB features a GPU core clock speed of 650 MHz, and the 512 MB of DDR2 RAM runs at 400 MHz through a 64-bit bus. It also features 16 Stream Processors, 8 TAUs, and 4 Raster Operation Units.

Compare those specifications to the Radeon R9 M270X, which makes use of a 28 nm design. AMD has clocked the core frequency at 725 MHz. The GDDR5 memory is set to run at a frequency of 1125 MHz on this specific card. It features 640 SPUs along with 40 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R9 M270X should theoretically be quite a bit better than the GeForce 8400 GS 512MB in general. (explain)

Radeon R9 M270X 72000 MB/sec
GeForce 8400 GS 512MB 6400 MB/sec
Difference: 65600 (1025%)

Texel Rate

The Radeon R9 M270X should be a lot (approximately 458%) better at AF than the GeForce 8400 GS 512MB. (explain)

Radeon R9 M270X 29000 Mtexels/sec
GeForce 8400 GS 512MB 5200 Mtexels/sec
Difference: 23800 (458%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M270X is superior to the GeForce 8400 GS 512MB, by far. (explain)

Radeon R9 M270X 11600 Mpixels/sec
GeForce 8400 GS 512MB 2600 Mpixels/sec
Difference: 9000 (346%)

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 M270X

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 M270X
Manufacturer nVidia AMD
Year June 2007 May 1 2014
Code Name G86 Venus XT
Memory 512 MB 2048 MB
Core Speed 650 MHz 725 MHz
Memory Speed 800 MHz 4500 MHz
Power (Max TDP) 40 watts (Unknown) watts
Bandwidth 6400 MB/sec 72000 MB/sec
Texel Rate 5200 Mtexels/sec 29000 Mtexels/sec
Pixel Rate 2600 Mpixels/sec 11600 Mpixels/sec
Unified Shaders 16 640
Texture Mapping Units 8 40
Render Output Units 4 16
Bus Type DDR2 GDDR5
Bus Width 64-bit 128-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 max amount of data (in units of megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel 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 ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 8400 GS 512MB

Amazon.com

Check prices at:

Radeon R9 M270X

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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