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Radeon HD 7950 3GB vs Radeon RX 470

Intro

The Radeon HD 7950 3GB comes with a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 384-bit bus, and uses a 28 nm design. It features 1792 SPUs, 112 Texture Address Units, and 32 ROPs.

Compare those specs to the Radeon RX 470, which features a clock speed of 926 MHz and a GDDR5 memory frequency of 1650 MHz. It also features a 256-bit bus, and makes use of a 14 nm design. It is made up of 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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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.

Zcash Mining Hash Rate

Radeon RX 470 289 Sol/s
Radeon HD 7950 3GB 229 Sol/s
Difference: 60 (26%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 120 Watts
Radeon HD 7950 3GB 200 Watts
Difference: 80 Watts (67%)

Memory Bandwidth

The Radeon HD 7950 3GB should in theory be a little bit faster than the Radeon RX 470 in general. (explain)

Radeon HD 7950 3GB 240000 MB/sec
Radeon RX 470 211200 MB/sec
Difference: 28800 (14%)

Texel Rate

The Radeon RX 470 should be quite a bit (about 32%) better at anisotropic filtering than the Radeon HD 7950 3GB. (explain)

Radeon RX 470 118528 Mtexels/sec
Radeon HD 7950 3GB 89600 Mtexels/sec
Difference: 28928 (32%)

Pixel Rate

The Radeon RX 470 should be a bit (more or less 16%) faster with regards to AA than the Radeon HD 7950 3GB, and able to handle higher resolutions more effectively. (explain)

Radeon RX 470 29632 Mpixels/sec
Radeon HD 7950 3GB 25600 Mpixels/sec
Difference: 4032 (16%)

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

Radeon HD 7950 3GB

Radeon RX 470

Specifications

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Model Radeon HD 7950 3GB Radeon RX 470
Manufacturer AMD AMD
Year January 2012 August 2016
Code Name Tahiti Pro Polaris 10
Memory 3072 MB 8192 MB
Core Speed 800 MHz 926 MHz
Memory Speed 5000 MHz 6600 MHz
Power (Max TDP) 200 watts 120 watts
Bandwidth 240000 MB/sec 211200 MB/sec
Texel Rate 89600 Mtexels/sec 118528 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 29632 Mpixels/sec
Unified Shaders 1792 2048
Texture Mapping Units 112 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 384-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 4.2 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, 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 number of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling 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 card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Radeon HD 7950 3GB

Radeon RX 470

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