Radeon HD 7950 vs Radeon R9 390 8G

Intro

Compare those specs to the Radeon R9 390 8G, which features a GPU core clock speed of 1000 MHz, and 8192 MB of GDDR5 memory set to run at 1500 MHz through a 512-bit bus. It also is comprised of 2560 SPUs, 160 TAUs, and 64 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 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 should be a lot faster than the Radeon HD 7950 overall. (explain)

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

Texel Rate

The Radeon R9 390 8G should be much (approximately 79%) better at AF 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 is quite a bit (more or less 150%) better at AA than the Radeon HD 7950, and capable of handling higher resolutions while still performing well. (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 data (counted in MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.