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GeForce GTX 970M vs Radeon HD 4870 1GB

Intro

The GeForce GTX 970M has a GPU core clock speed of 924 MHz, and the 3072 MB of GDDR5 memory runs at 1000 MHz through a 192-bit bus. It also is comprised of 1280 SPUs, 80 TAUs, and 48 ROPs.

Compare that to the Radeon HD 4870 1GB, which has a GPU core clock speed of 750 MHz, and 1024 MB of GDDR5 RAM running at 900 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 40 TAUs, and 16 ROPs.

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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

The Radeon HD 4870 1GB should theoretically be just a bit faster than the GeForce GTX 970M overall. (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 (about 146%) better 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

The GeForce GTX 970M will be much (more or less 270%) faster with regards to anti-aliasing than the Radeon HD 4870 1GB, and also will be capable of handling higher resolutions without slowing down too much. (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

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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: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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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.

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