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GeForce GTX 1070 Ti vs Radeon HD 4870 X2

Intro

The GeForce GTX 1070 Ti has core clock speeds of 1607 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR5 RAM. It features 2432 SPUs along with 152 Texture Address Units and 64 Rasterization Operator Units.

Compare all that to the Radeon HD 4870 X2, which has a clock frequency of 750 MHz and a GDDR5 memory frequency of 900 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It is made up of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 1070 Ti 180 Watts
Radeon HD 4870 X2 350 Watts
Difference: 170 Watts (94%)

Memory Bandwidth

In theory, the GeForce GTX 1070 Ti should perform just a bit faster than the Radeon HD 4870 X2 overall. (explain)

GeForce GTX 1070 Ti 262144 MB/sec
Radeon HD 4870 X2 230400 MB/sec
Difference: 31744 (14%)

Texel Rate

The GeForce GTX 1070 Ti should be a lot (about 307%) better at anisotropic filtering than the Radeon HD 4870 X2. (explain)

GeForce GTX 1070 Ti 244264 Mtexels/sec
Radeon HD 4870 X2 60000 Mtexels/sec
Difference: 184264 (307%)

Pixel Rate

The GeForce GTX 1070 Ti should be quite a bit (more or less 329%) more effective at AA than the Radeon HD 4870 X2, and also capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 1070 Ti 102848 Mpixels/sec
Radeon HD 4870 X2 24000 Mpixels/sec
Difference: 78848 (329%)

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 1070 Ti

Amazon.com

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Radeon HD 4870 X2

Amazon.com

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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 1070 Ti Radeon HD 4870 X2
Manufacturer nVidia AMD
Year November 2017 Aug 12, 2008
Code Name GP104-300 R700
Memory 8192 MB 1024 MB (x2)
Core Speed 1607 MHz 750 MHz (x2)
Memory Speed 8000 MHz 3600 MHz (x2)
Power (Max TDP) 180 watts 350 watts
Bandwidth 262144 MB/sec 230400 MB/sec
Texel Rate 244264 Mtexels/sec 60000 Mtexels/sec
Pixel Rate 102848 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 2432 800(160x5) (x2)
Texture Mapping Units 152 40 (x2)
Render Output Units 64 16 (x2)
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit (x2)
Fab Process 16 nm 55 nm
Transistors 7200 million 956 million
Bus PCIe 3.0 x16 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 12.0 DirectX 10.1
OpenGL Version OpenGL 4.6 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GTX 1070 Ti

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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