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Radeon HD 7870 XT vs Radeon RX 470 4GB

Intro

The Radeon HD 7870 XT uses a 28 nm design. AMD has set the core speed at 925 MHz. The GDDR5 RAM works at a frequency of 1500 MHz on this particular card. It features 1536 SPUs along with 96 TAUs and 32 Rasterization Operator Units.

Compare those specs to the Radeon RX 470 4GB, which features a core clock speed of 926 MHz and a GDDR5 memory speed of 1650 MHz. It also makes use of a 256-bit memory bus, and makes use of a 14 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

Ethereum Mining Hash Rate

Radeon RX 470 4GB 27 Mh/s
Radeon HD 7870 XT 15 Mh/s
Difference: 12 (80%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 4GB 120 Watts
Radeon HD 7870 XT 185 Watts
Difference: 65 Watts (54%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 470 4GB should be 10% quicker than the Radeon HD 7870 XT overall, due to its higher bandwidth. (explain)

Radeon RX 470 4GB 211200 MB/sec
Radeon HD 7870 XT 192000 MB/sec
Difference: 19200 (10%)

Texel Rate

The Radeon RX 470 4GB will be a lot (approximately 33%) better at texture filtering than the Radeon HD 7870 XT. (explain)

Radeon RX 470 4GB 118528 Mtexels/sec
Radeon HD 7870 XT 88800 Mtexels/sec
Difference: 29728 (33%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 470 4GB is the winner, but only just. (explain)

Radeon RX 470 4GB 29632 Mpixels/sec
Radeon HD 7870 XT 29600 Mpixels/sec
Difference: 32 (0%)

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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Radeon HD 7870 XT

Amazon.com

Check prices at:

Radeon RX 470 4GB

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 Radeon HD 7870 XT Radeon RX 470 4GB
Manufacturer AMD AMD
Year November 2012 August 2016
Code Name Tahiti LE Polaris 10
Memory 2048 MB 4096 MB
Core Speed 925 MHz 926 MHz
Memory Speed 6000 MHz 6600 MHz
Power (Max TDP) 185 watts 120 watts
Bandwidth 192000 MB/sec 211200 MB/sec
Texel Rate 88800 Mtexels/sec 118528 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 29632 Mpixels/sec
Unified Shaders 1536 2048
Texture Mapping Units 96 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 14 nm
Transistors 4313 million 5700 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 12.0
OpenGL Version OpenGL 4.3 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core 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 is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Radeon HD 7870 XT

Amazon.com

Check prices at:

Radeon RX 470 4GB

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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