Radeon HD 7950 vs Radeon R9 390 8G

Intro

Compare that to the Radeon R9 390 8G, which makes use of a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 memory is set to run at a speed of 1500 MHz on this specific card. It features 2560 SPUs along with 160 TAUs and 64 Rasterization Operator 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 R9 390 8G		12733 points
Radeon HD 7950		7731 points
	Difference: 5002 (65%)

Zcash Mining Hash Rate

Radeon R9 390 8G		326 Sol/s
Radeon HD 7950		235 Sol/s
	Difference: 91 (39%)

Ethereum Mining Hash Rate

Radeon R9 390 8G		28 Mh/s
Radeon HD 7950		21 Mh/s
	Difference: 7 (33%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950		200 Watts
Radeon R9 390 8G		275 Watts
	Difference: 75 Watts (38%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390 8G will be 60% quicker than the Radeon HD 7950 in general, due to its higher bandwidth. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon HD 7950		240000 MB/sec
	Difference: 144000 (60%)

Texel Rate

The Radeon R9 390 8G is much (more or less 79%) better at texture filtering than the Radeon HD 7950. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon HD 7950		89600 Mtexels/sec
	Difference: 70400 (79%)

Pixel Rate

The Radeon R9 390 8G will be much (more or less 150%) better at full screen anti-aliasing than the Radeon HD 7950, and also should be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon HD 7950		25600 Mpixels/sec
	Difference: 38400 (150%)

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: Bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the 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 chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.