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GeForce GTX 880M vs Radeon HD 6870

Intro

The GeForce GTX 880M comes with a GPU core clock speed of 954 MHz, and the 4096 MB of GDDR5 memory runs at 1000 MHz through a 256-bit bus. It also is made up of 1536 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Compare that to the Radeon HD 6870, which features a core clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also makes use of a 256-bit bus, and uses a 40 nm design. It is comprised of 1120 SPUs, 56 TAUs, and 32 Raster Operation 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

GeForce GTX 880M 6360 points
Radeon HD 6870 2870 points
Difference: 3490 (122%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M 130 Watts
Radeon HD 6870 151 Watts
Difference: 21 Watts (16%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6870 should theoretically be a small bit better than the GeForce GTX 880M overall. (explain)

Radeon HD 6870 134400 MB/sec
GeForce GTX 880M 128000 MB/sec
Difference: 6400 (5%)

Texel Rate

The GeForce GTX 880M should be much (more or less 142%) faster with regards to AF than the Radeon HD 6870. (explain)

GeForce GTX 880M 122112 Mtexels/sec
Radeon HD 6870 50400 Mtexels/sec
Difference: 71712 (142%)

Pixel Rate

The GeForce GTX 880M will be a bit (more or less 6%) faster with regards to AA than the Radeon HD 6870, and able to handle higher screen resolutions better. (explain)

GeForce GTX 880M 30528 Mpixels/sec
Radeon HD 6870 28800 Mpixels/sec
Difference: 1728 (6%)

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 880M

Amazon.com

Check prices at:

Radeon HD 6870

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 880M Radeon HD 6870
Manufacturer nVidia AMD
Year March 12 2014 October 2010
Code Name GK104 Barts XT
Memory 4096 MB 1024 MB
Core Speed 954 MHz 900 MHz
Memory Speed 4000 MHz 4200 MHz
Power (Max TDP) 130 watts 151 watts
Bandwidth 128000 MB/sec 134400 MB/sec
Texel Rate 122112 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 30528 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 1536 1120
Texture Mapping Units 128 56
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 40 nm
Transistors (Unknown) million 1700 million
Bus PCIe 3.0 x16 PCIe x16
DirectX Version DirectX 12 DirectX 11
OpenGL Version OpenGL 4.5 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the card's bus 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 4 instead. The higher the bandwidth is, 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 amount of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics 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 that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GTX 880M

Amazon.com

Check prices at:

Radeon HD 6870

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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