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GeForce GTX 970M vs Radeon HD 4870 1GB

Intro

The GeForce GTX 970M has core clock speeds of 924 MHz on the GPU, and 1000 MHz on the 3072 MB of GDDR5 memory. It features 1280 SPUs as well as 80 TAUs and 48 Rasterization Operator Units.

Compare that to the Radeon HD 4870 1GB, which uses a 55 nm design. AMD has clocked the core speed at 750 MHz. The GDDR5 RAM runs at a speed of 900 MHz on this model. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 970M 75 Watts
Radeon HD 4870 1GB 150 Watts
Difference: 75 Watts (100%)

Memory Bandwidth

In theory, the Radeon HD 4870 1GB will be 20% faster than the GeForce GTX 970M in general, due to its higher data rate. (explain)

Radeon HD 4870 1GB 115200 MB/sec
GeForce GTX 970M 96000 MB/sec
Difference: 19200 (20%)

Texel Rate

The GeForce GTX 970M should be much (approximately 146%) more effective at texture filtering than the Radeon HD 4870 1GB. (explain)

GeForce GTX 970M 73920 Mtexels/sec
Radeon HD 4870 1GB 30000 Mtexels/sec
Difference: 43920 (146%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 970M is the winner, by a large margin. (explain)

GeForce GTX 970M 44352 Mpixels/sec
Radeon HD 4870 1GB 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

Check prices at:

Radeon HD 4870 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 970M Radeon HD 4870 1GB
Manufacturer nVidia AMD
Year October 7 2014 Jun 25, 2008
Code Name GM204 RV770 XT
Memory 3072 MB 1024 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: Bandwidth is the max amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. 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 fill rate is also dependant on lots of 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

Hide Prices

GeForce GTX 970M

Amazon.com

Check prices at:

Radeon HD 4870 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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