Radeon HD 7950 3GB vs Radeon RX 570

Intro

Compare all of that to the Radeon RX 570, which comes with a core clock speed of 1168 MHz and a GDDR5 memory speed of 1750 MHz. It also features a 256-bit bus, and uses a 14 nm design. It features 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

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 570		298 Sol/s
Radeon HD 7950 3GB		229 Sol/s
	Difference: 69 (30%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 570		150 Watts
Radeon HD 7950 3GB		200 Watts
	Difference: 50 Watts (33%)

Memory Bandwidth

In theory, the Radeon HD 7950 3GB will be 5% quicker than the Radeon RX 570 in general, due to its greater bandwidth. (explain)

Radeon HD 7950 3GB		240000 MB/sec
Radeon RX 570		229376 MB/sec
	Difference: 10624 (5%)

Texel Rate

The Radeon RX 570 is quite a bit (approximately 67%) better at AF than the Radeon HD 7950 3GB. (explain)

Radeon RX 570		149504 Mtexels/sec
Radeon HD 7950 3GB		89600 Mtexels/sec
	Difference: 59904 (67%)

Pixel Rate

The Radeon RX 570 will be quite a bit (approximately 46%) faster with regards to anti-aliasing than the Radeon HD 7950 3GB, and will be capable of handling higher resolutions while still performing well. (explain)

Radeon RX 570		37376 Mpixels/sec
Radeon HD 7950 3GB		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

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines 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 rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.