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GeForce GTX 970M vs Radeon HD 4870 512MB

Intro

The GeForce GTX 970M uses a 28 nm design. nVidia has set the core frequency at 924 MHz. The GDDR5 memory runs at a speed of 1000 MHz on this card. It features 1280 SPUs along with 80 Texture Address Units and 48 ROPs.

Compare all that to the Radeon HD 4870 512MB, which has a clock frequency of 750 MHz and a GDDR5 memory speed of 900 MHz. It also makes use of a 256-bit bus, and uses a 55 nm design. It is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 970M 75 Watts
Radeon HD 4870 512MB 150 Watts
Difference: 75 Watts (100%)

Memory Bandwidth

In theory, the Radeon HD 4870 512MB should perform just a bit faster than the GeForce GTX 970M overall. (explain)

Radeon HD 4870 512MB 115200 MB/sec
GeForce GTX 970M 96000 MB/sec
Difference: 19200 (20%)

Texel Rate

The GeForce GTX 970M should be much (approximately 146%) better at AF than the Radeon HD 4870 512MB. (explain)

GeForce GTX 970M 73920 Mtexels/sec
Radeon HD 4870 512MB 30000 Mtexels/sec
Difference: 43920 (146%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 970M is the winner, by far. (explain)

GeForce GTX 970M 44352 Mpixels/sec
Radeon HD 4870 512MB 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 512MB

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

Display Specifications

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Model GeForce GTX 970M Radeon HD 4870 512MB
Manufacturer nVidia AMD
Year October 7 2014 Jun 25, 2008
Code Name GM204 RV770 XT
Memory 3072 MB 512 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. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied 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 the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many 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 512MB

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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