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GeForce 8400 GS 512MB vs Radeon R9 M385X

Intro

The GeForce 8400 GS 512MB makes use of a 80 nm design. nVidia has clocked the core frequency at 650 MHz. The DDR2 RAM works at a speed of 400 MHz on this specific card. It features 16 SPUs as well as 8 Texture Address Units and 4 ROPs.

Compare those specifications to the Radeon R9 M385X, which has a core clock speed of 1100 MHz and a GDDR5 memory frequency of 1500 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It features 896 SPUs, 56 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R9 M385X should perform much faster than the GeForce 8400 GS 512MB in general. (explain)

Radeon R9 M385X 96000 MB/sec
GeForce 8400 GS 512MB 6400 MB/sec
Difference: 89600 (1400%)

Texel Rate

The Radeon R9 M385X should be quite a bit (approximately 1085%) more effective at AF than the GeForce 8400 GS 512MB. (explain)

Radeon R9 M385X 61600 Mtexels/sec
GeForce 8400 GS 512MB 5200 Mtexels/sec
Difference: 56400 (1085%)

Pixel Rate

The Radeon R9 M385X is a lot (about 577%) better at anti-aliasing than the GeForce 8400 GS 512MB, and also able to handle higher resolutions without slowing down too much. (explain)

Radeon R9 M385X 17600 Mpixels/sec
GeForce 8400 GS 512MB 2600 Mpixels/sec
Difference: 15000 (577%)

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 M385X

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 M385X
Manufacturer nVidia AMD
Year June 2007 2015
Code Name G86 Bonaire
Memory 512 MB 4096 MB
Core Speed 650 MHz 1100 MHz
Memory Speed 800 MHz 6000 MHz
Power (Max TDP) 40 watts (Unknown) watts
Bandwidth 6400 MB/sec 96000 MB/sec
Texel Rate 5200 Mtexels/sec 61600 Mtexels/sec
Pixel Rate 2600 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 16 896
Texture Mapping Units 8 56
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 12
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units of the card by the core 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 applied 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 a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the 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 M385X

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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