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GeForce GTX 860M vs Radeon HD 7870 XT

Intro

The GeForce GTX 860M features a GPU clock speed of 797 MHz, and the 4096 MB of GDDR5 memory runs at 1000 MHz through a 128-bit bus. It also is comprised of 1152 SPUs, 96 TAUs, and 16 Raster Operation Units.

Compare those specs to the Radeon HD 7870 XT, which makes use of a 28 nm design. AMD has clocked the core frequency at 925 MHz. The GDDR5 memory works at a frequency of 1500 MHz on this model. It features 1536 SPUs along with 96 Texture Address Units and 32 Rasterization Operator Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7870 XT 6390 points
GeForce GTX 860M 4340 points
Difference: 2050 (47%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M 45 Watts
Radeon HD 7870 XT 185 Watts
Difference: 140 Watts (311%)

Memory Bandwidth

In theory, the Radeon HD 7870 XT will be 200% quicker than the GeForce GTX 860M overall, due to its higher data rate. (explain)

Radeon HD 7870 XT 192000 MB/sec
GeForce GTX 860M 64000 MB/sec
Difference: 128000 (200%)

Texel Rate

The Radeon HD 7870 XT is a small bit (more or less 16%) more effective at texture filtering than the GeForce GTX 860M. (explain)

Radeon HD 7870 XT 88800 Mtexels/sec
GeForce GTX 860M 76512 Mtexels/sec
Difference: 12288 (16%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 7870 XT is the winner, and very much so. (explain)

Radeon HD 7870 XT 29600 Mpixels/sec
GeForce GTX 860M 12752 Mpixels/sec
Difference: 16848 (132%)

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 860M

Amazon.com

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Radeon HD 7870 XT

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 7870 XT
Manufacturer nVidia AMD
Year March 12 2014 November 2012
Code Name GM107 Tahiti LE
Memory 4096 MB 2048 MB
Core Speed 797 MHz 925 MHz
Memory Speed 4000 MHz 6000 MHz
Power (Max TDP) 45 watts 185 watts
Bandwidth 64000 MB/sec 192000 MB/sec
Texel Rate 76512 Mtexels/sec 88800 Mtexels/sec
Pixel Rate 12752 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 1152 1536
Texture Mapping Units 96 96
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million 4313 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 11.1
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of information (measured in MB per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GTX 860M

Amazon.com

Check prices at:

Radeon HD 7870 XT

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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