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Radeon HD 7950 vs Radeon RX 470


Intro

The Radeon HD 7950 uses a 28 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 memory is set to run at a frequency of 1250 MHz on this specific model. It features 1792 SPUs as well as 112 TAUs and 32 ROPs.

Compare those specs to the Radeon RX 470, which features a core clock frequency of 926 MHz and a GDDR5 memory frequency of 1650 MHz. It also uses a 256-bit bus, and makes use of a 14 nm design. It is comprised 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.

3DMark Fire Strike Graphics Score

Radeon RX 470 11810 points
Radeon HD 7950 7731 points
Difference: 4079 (53%)

Zcash Mining Hash Rate

Radeon RX 470 289 Sol/s
Radeon HD 7950 235 Sol/s
Difference: 54 (23%)

Ethereum Mining Hash Rate

Radeon RX 470 26 Mh/s
Radeon HD 7950 21 Mh/s
Difference: 5 (24%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically, the Radeon HD 7950 should be a bit faster than the Radeon RX 470 overall. (explain)

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

Texel Rate

The Radeon RX 470 is much (approximately 32%) better at AF than the Radeon HD 7950. (explain)

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

Pixel Rate

The Radeon RX 470 will be just a bit (more or less 16%) better at full screen anti-aliasing than the Radeon HD 7950, and also should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon RX 470 29632 Mpixels/sec
Radeon HD 7950 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

Radeon RX 470

Specifications

Display Specifications

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Model Radeon HD 7950 Radeon RX 470
Manufacturer AMD AMD
Year January 2012 August 2016
Code Name Tahiti Pro Polaris 10
Memory 1536 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 (counted in megabytes per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 number of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the video 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 maximum amount of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core 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 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 ability to get to the maximum fill rate.

Radeon HD 7950

Radeon RX 470

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