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GeForce GTX 860M vs Radeon HD 4850 X2 1GB

Intro

The GeForce GTX 860M has clock speeds of 797 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 RAM. It features 1152 SPUs as well as 96 Texture Address Units and 16 Rasterization Operator Units.

Compare all of that to the Radeon HD 4850 X2 1GB, which comes with GPU clock speed of 625 MHz, and 1024 MB of GDDR3 RAM running at 993 MHz through a 256-bit bus. It also features 800(160x5) Stream Processors, 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 1GB 250 Watts
Difference: 205 Watts (456%)

Memory Bandwidth

Performance-wise, the Radeon HD 4850 X2 1GB should theoretically be quite a bit superior to the GeForce GTX 860M in general. (explain)

Radeon HD 4850 X2 1GB 127104 MB/sec
GeForce GTX 860M 64000 MB/sec
Difference: 63104 (99%)

Texel Rate

The GeForce GTX 860M is much (about 53%) faster with regards to anisotropic filtering than the Radeon HD 4850 X2 1GB. (explain)

GeForce GTX 860M 76512 Mtexels/sec
Radeon HD 4850 X2 1GB 50000 Mtexels/sec
Difference: 26512 (53%)

Pixel Rate

The Radeon HD 4850 X2 1GB is much (about 57%) better at anti-aliasing than the GeForce GTX 860M, and also will be able to handle higher resolutions while still performing well. (explain)

Radeon HD 4850 X2 1GB 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

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Radeon HD 4850 X2 1GB

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 1GB
Manufacturer nVidia AMD
Year March 12 2014 Nov 7, 2008
Code Name GM107 R700
Memory 4096 MB 1024 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: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units 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 in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 860M

Amazon.com

Check prices at:

Radeon HD 4850 X2 1GB

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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