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GeForce GTX 970M vs Radeon HD 4870 X2

Intro

The GeForce GTX 970M features a GPU clock speed of 924 MHz, and the 3072 MB of GDDR5 RAM runs at 1000 MHz through a 192-bit bus. It also is comprised of 1280 Stream Processors, 80 TAUs, and 48 Raster Operation Units.

Compare all that to the Radeon HD 4870 X2, which makes use of a 55 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR5 RAM is set to run at a speed of 900 MHz on this specific model. It features 800(160x5) SPUs along with 40 TAUs 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 X2 350 Watts
Difference: 275 Watts (367%)

Memory Bandwidth

In theory, the Radeon HD 4870 X2 is 140% quicker than the GeForce GTX 970M overall, due to its greater bandwidth. (explain)

Radeon HD 4870 X2 230400 MB/sec
GeForce GTX 970M 96000 MB/sec
Difference: 134400 (140%)

Texel Rate

The GeForce GTX 970M should be a lot (about 23%) better at anisotropic filtering than the Radeon HD 4870 X2. (explain)

GeForce GTX 970M 73920 Mtexels/sec
Radeon HD 4870 X2 60000 Mtexels/sec
Difference: 13920 (23%)

Pixel Rate

The GeForce GTX 970M will be quite a bit (more or less 85%) better at anti-aliasing than the Radeon HD 4870 X2, and should be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 970M 44352 Mpixels/sec
Radeon HD 4870 X2 24000 Mpixels/sec
Difference: 20352 (85%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTX 970M

Amazon.com

Check prices at:

Radeon HD 4870 X2

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 X2
Manufacturer nVidia AMD
Year October 7 2014 Aug 12, 2008
Code Name GM204 R700
Memory 3072 MB 1024 MB (x2)
Core Speed 924 MHz 750 MHz (x2)
Memory Speed 4000 MHz 3600 MHz (x2)
Power (Max TDP) 75 watts 350 watts
Bandwidth 96000 MB/sec 230400 MB/sec
Texel Rate 73920 Mtexels/sec 60000 Mtexels/sec
Pixel Rate 44352 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 1280 800(160x5) (x2)
Texture Mapping Units 80 40 (x2)
Render Output Units 48 16 (x2)
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit (x2)
Fab Process 28 nm 55 nm
Transistors (Unknown) million 956 million
Bus PCIe 3.0 x16 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units of the card 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. 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 output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 970M

Amazon.com

Check prices at:

Radeon HD 4870 X2

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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