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GeForce GTX 860M vs Radeon HD 4850 X2 512MB

Intro

The GeForce GTX 860M comes with core clock speeds of 797 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 memory. It features 1152 SPUs along with 96 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon HD 4850 X2 512MB, which features a clock frequency of 625 MHz and a GDDR3 memory frequency of 993 MHz. It also uses a 256-bit bus, and makes use of a 55 nm design. It is made up of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M 45 Watts
Radeon HD 4850 X2 512MB 250 Watts
Difference: 205 Watts (456%)

Memory Bandwidth

The Radeon HD 4850 X2 512MB should theoretically perform much faster than the GeForce GTX 860M overall. (explain)

Radeon HD 4850 X2 512MB 127104 MB/sec
GeForce GTX 860M 64000 MB/sec
Difference: 63104 (99%)

Texel Rate

The GeForce GTX 860M will be much (more or less 53%) faster with regards to AF than the Radeon HD 4850 X2 512MB. (explain)

GeForce GTX 860M 76512 Mtexels/sec
Radeon HD 4850 X2 512MB 50000 Mtexels/sec
Difference: 26512 (53%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 4850 X2 512MB is superior to the GeForce GTX 860M, by far. (explain)

Radeon HD 4850 X2 512MB 20000 Mpixels/sec
GeForce GTX 860M 12752 Mpixels/sec
Difference: 7248 (57%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTX 860M

Amazon.com

Check prices at:

Radeon HD 4850 X2 512MB

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 860M Radeon HD 4850 X2 512MB
Manufacturer nVidia AMD
Year March 12 2014 Nov 7, 2008
Code Name GM107 R700
Memory 4096 MB 512 MB (x2)
Core Speed 797 MHz 625 MHz (x2)
Memory Speed 4000 MHz 1986 MHz (x2)
Power (Max TDP) 45 watts 250 watts
Bandwidth 64000 MB/sec 127104 MB/sec
Texel Rate 76512 Mtexels/sec 50000 Mtexels/sec
Pixel Rate 12752 Mpixels/sec 20000 Mpixels/sec
Unified Shaders 1152 800(160x5) (x2)
Texture Mapping Units 96 40 (x2)
Render Output Units 16 16 (x2)
Bus Type GDDR5 GDDR3
Bus Width 128-bit 256-bit (x2)
Fab Process 28 nm 55 nm
Transistors (Unknown) million 956 million
Bus PCIe 3.0 x16 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Bandwidth is the largest amount of information (measured in MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GTX 860M

Amazon.com

Check prices at:

Radeon HD 4850 X2 512MB

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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