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Radeon HD 7950 3GB vs Radeon RX 580

Intro

The Radeon HD 7950 3GB comes with a core clock frequency of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 384-bit bus, and uses a 28 nm design. It is made up of 1792 SPUs, 112 TAUs, and 32 Raster Operation Units.

Compare that to the Radeon RX 580, which makes use of a 14 nm design. AMD has set the core speed at 1257 MHz. The GDDR5 RAM runs at a frequency of 2000 MHz on this specific card. It features 2304 SPUs as well as 144 TAUs and 32 Rasterization Operator Units.

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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 580 315 Sol/s
Radeon HD 7950 3GB 229 Sol/s
Difference: 86 (38%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 580 185 Watts
Radeon HD 7950 3GB 200 Watts
Difference: 15 Watts (8%)

Memory Bandwidth

Performance-wise, the Radeon RX 580 should in theory be a small bit better than the Radeon HD 7950 3GB overall. (explain)

Radeon RX 580 262144 MB/sec
Radeon HD 7950 3GB 240000 MB/sec
Difference: 22144 (9%)

Texel Rate

The Radeon RX 580 will be a lot (about 102%) faster with regards to anisotropic filtering than the Radeon HD 7950 3GB. (explain)

Radeon RX 580 181008 Mtexels/sec
Radeon HD 7950 3GB 89600 Mtexels/sec
Difference: 91408 (102%)

Pixel Rate

The Radeon RX 580 will be a lot (approximately 57%) better at FSAA than the Radeon HD 7950 3GB, and also capable of handling higher resolutions while still performing well. (explain)

Radeon RX 580 40224 Mpixels/sec
Radeon HD 7950 3GB 25600 Mpixels/sec
Difference: 14624 (57%)

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 7950 3GB

Amazon.com

Check prices at:

Radeon RX 580

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 7950 3GB Radeon RX 580
Manufacturer AMD AMD
Year January 2012 April 2017
Code Name Tahiti Pro Polaris 20
Memory 3072 MB 8192 MB
Core Speed 800 MHz 1257 MHz
Memory Speed 5000 MHz 8000 MHz
Power (Max TDP) 200 watts 185 watts
Bandwidth 240000 MB/sec 262144 MB/sec
Texel Rate 89600 Mtexels/sec 181008 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 40224 Mpixels/sec
Unified Shaders 1792 2304
Texture Mapping Units 112 144
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 maximum amount of information (counted in megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are 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 this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Radeon HD 7950 3GB

Amazon.com

Check prices at:

Radeon RX 580

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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