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Radeon HD 7950 vs Radeon RX 570

Intro

The Radeon HD 7950 makes use of a 28 nm design. AMD has set the core speed at 800 MHz. The GDDR5 RAM runs at a speed of 1250 MHz on this specific card. It features 1792 SPUs along with 112 TAUs and 32 ROPs.

Compare that to the Radeon RX 570, which comes with core speeds of 1168 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 Texture Address Units 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.

3DMark Fire Strike Graphics Score

Radeon RX 570		12108 points
Radeon HD 7950		7731 points
	Difference: 4377 (57%)

Zcash Mining Hash Rate

Radeon RX 570		298 Sol/s
Radeon HD 7950		235 Sol/s
	Difference: 63 (27%)

Ethereum Mining Hash Rate

Radeon RX 570		26 Mh/s
Radeon HD 7950		21 Mh/s
	Difference: 5 (24%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 570		150 Watts
Radeon HD 7950		200 Watts
	Difference: 50 Watts (33%)

Memory Bandwidth

The Radeon HD 7950, in theory, should be a little bit faster than the Radeon RX 570 overall. (explain)

Radeon HD 7950		240000 MB/sec
Radeon RX 570		229376 MB/sec
	Difference: 10624 (5%)

Texel Rate

The Radeon RX 570 will be a lot (more or less 67%) more effective at anisotropic filtering than the Radeon HD 7950. (explain)

Radeon RX 570		149504 Mtexels/sec
Radeon HD 7950		89600 Mtexels/sec
	Difference: 59904 (67%)

Pixel Rate

The Radeon RX 570 is quite a bit (more or less 46%) more effective at anti-aliasing than the Radeon HD 7950, and also capable of handling higher screen resolutions more effectively. (explain)

Radeon RX 570		37376 Mpixels/sec
Radeon HD 7950		25600 Mpixels/sec
	Difference: 11776 (46%)

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

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Radeon RX 570

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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	Radeon HD 7950	Radeon RX 570
Manufacturer	AMD	AMD
Year	January 2012	April 2017
Code Name	Tahiti Pro	Polaris 20
Memory	1536 MB	4096 MB
Core Speed	800 MHz	1168 MHz
Memory Speed	5000 MHz	7000 MHz
Power (Max TDP)	200 watts	150 watts
Bandwidth	240000 MB/sec	229376 MB/sec
Texel Rate	89600 Mtexels/sec	149504 Mtexels/sec
Pixel Rate	25600 Mpixels/sec	37376 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: Bandwidth is the max amount of information (in units of megabytes per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the video 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 number of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

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