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GeForce GTX 970M vs Radeon HD 4870 2GB

Intro

The GeForce GTX 970M comes with a GPU core clock speed of 924 MHz, and the 3072 MB of GDDR5 RAM is set to run at 1000 MHz through a 192-bit bus. It also is made up of 1280 SPUs, 80 TAUs, and 48 Raster Operation Units.

Compare those specifications to the Radeon HD 4870 2GB, which uses a 55 nm design. AMD has set the core speed at 750 MHz. The GDDR5 RAM runs at a speed of 900 MHz on this specific model. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 970M 75 Watts
Radeon HD 4870 2GB 150 Watts
Difference: 75 Watts (100%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 2GB should be just a bit faster than the GeForce GTX 970M overall. (explain)

Radeon HD 4870 2GB 115200 MB/sec
GeForce GTX 970M 96000 MB/sec
Difference: 19200 (20%)

Texel Rate

The GeForce GTX 970M should be much (more or less 146%) more effective at AF than the Radeon HD 4870 2GB. (explain)

GeForce GTX 970M 73920 Mtexels/sec
Radeon HD 4870 2GB 30000 Mtexels/sec
Difference: 43920 (146%)

Pixel Rate

The GeForce GTX 970M will be a lot (about 270%) better at anti-aliasing than the Radeon HD 4870 2GB, and will be capable of handling higher resolutions better. (explain)

GeForce GTX 970M 44352 Mpixels/sec
Radeon HD 4870 2GB 12000 Mpixels/sec
Difference: 32352 (270%)

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 970M

Amazon.com

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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 970M Radeon HD 4870 2GB
Manufacturer nVidia AMD
Year October 7 2014 Jun 25, 2008
Code Name GM204 RV770 XT
Memory 3072 MB 2048 MB
Core Speed 924 MHz 750 MHz
Memory Speed 4000 MHz 3600 MHz
Power (Max TDP) 75 watts 150 watts
Bandwidth 96000 MB/sec 115200 MB/sec
Texel Rate 73920 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 44352 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 1280 800(160x5)
Texture Mapping Units 80 40
Render Output Units 48 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 largest amount of data (counted in MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 970M

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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