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GeForce 8400 GS 512MB vs Radeon R9 M385X

Intro

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

Compare that to the Radeon R9 M385X, which features a clock frequency of 1100 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It is comprised of 896 SPUs, 56 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M385X should be much faster than the GeForce 8400 GS 512MB overall. (explain)

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

Texel Rate

The Radeon R9 M385X will be much (about 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

If running with high levels of AA is important to you, then the Radeon R9 M385X is a better choice, and very much so. (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 max amount of data (measured in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to 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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