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GeForce GTX 970M vs Radeon R9 M385X

Intro

The GeForce GTX 970M has a core clock speed of 924 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 192-bit bus, and makes use of a 28 nm design. It is comprised of 1280 SPUs, 80 Texture Address Units, and 48 ROPs.

Compare that to the Radeon R9 M385X, which has GPU core speed of 1100 MHz, and 4096 MB of GDDR5 memory set to run at 1500 MHz through a 128-bit bus. It also features 896 SPUs, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Both cards have the exact same memory bandwidth, so in theory they should have the same performance. (explain)

Texel Rate

The GeForce GTX 970M will be a little bit (about 20%) faster with regards to AF than the Radeon R9 M385X. (explain)

GeForce GTX 970M 73920 Mtexels/sec
Radeon R9 M385X 61600 Mtexels/sec
Difference: 12320 (20%)

Pixel Rate

The GeForce GTX 970M will be quite a bit (more or less 152%) more effective at full screen anti-aliasing than the Radeon R9 M385X, and also able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 970M 44352 Mpixels/sec
Radeon R9 M385X 17600 Mpixels/sec
Difference: 26752 (152%)

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 GTX 970M

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 GTX 970M Radeon R9 M385X
Manufacturer nVidia AMD
Year October 7 2014 2015
Code Name GM204 Bonaire
Memory 3072 MB 4096 MB
Core Speed 924 MHz 1100 MHz
Memory Speed 4000 MHz 6000 MHz
Power (Max TDP) 75 watts (Unknown) watts
Bandwidth 96000 MB/sec 96000 MB/sec
Texel Rate 73920 Mtexels/sec 61600 Mtexels/sec
Pixel Rate 44352 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 1280 896
Texture Mapping Units 80 56
Render Output Units 48 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 128-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in MB per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 texture units by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its 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 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 970M

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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