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GeForce GTX 870M vs Radeon HD 4870 2GB

Intro

The GeForce GTX 870M features a GPU core clock speed of 941 MHz, and the 3072 MB of GDDR5 memory runs at 1000 MHz through a 192-bit bus. It also features 1344 SPUs, 112 Texture Address Units, and 24 ROPs.

Compare those specifications to the Radeon HD 4870 2GB, which has clock speeds of 750 MHz on the GPU, and 900 MHz on the 2048 MB of GDDR5 memory. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M 110 Watts
Radeon HD 4870 2GB 150 Watts
Difference: 40 Watts (36%)

Memory Bandwidth

The Radeon HD 4870 2GB should in theory be just a bit faster than the GeForce GTX 870M in general. (explain)

Radeon HD 4870 2GB 115200 MB/sec
GeForce GTX 870M 96000 MB/sec
Difference: 19200 (20%)

Texel Rate

The GeForce GTX 870M will be much (about 251%) better at texture filtering than the Radeon HD 4870 2GB. (explain)

GeForce GTX 870M 105392 Mtexels/sec
Radeon HD 4870 2GB 30000 Mtexels/sec
Difference: 75392 (251%)

Pixel Rate

The GeForce GTX 870M is a lot (approximately 88%) faster with regards to full screen anti-aliasing than the Radeon HD 4870 2GB, and should be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 870M 22584 Mpixels/sec
Radeon HD 4870 2GB 12000 Mpixels/sec
Difference: 10584 (88%)

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 870M

Amazon.com

Check prices at:

Radeon HD 4870 2GB

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 870M Radeon HD 4870 2GB
Manufacturer nVidia AMD
Year March 12 2014 Jun 25, 2008
Code Name GK104 RV770 XT
Memory 3072 MB 2048 MB
Core Speed 941 MHz 750 MHz
Memory Speed 4000 MHz 3600 MHz
Power (Max TDP) 110 watts 150 watts
Bandwidth 96000 MB/sec 115200 MB/sec
Texel Rate 105392 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 22584 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 1344 800(160x5)
Texture Mapping Units 112 40
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million 956 million
Bus PCIe 3.0 x16 PCIe 2.0 x16
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 megabytes per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 870M

Amazon.com

Check prices at:

Radeon HD 4870 2GB

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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