Radeon R9 270X vs Radeon R9 390X 8G

Intro

Compare all that to the Radeon R9 390X 8G, which comes with a clock speed of 1050 MHz and a GDDR5 memory frequency of 1500 MHz. It also features a 512-bit bus, and uses a 28 nm design. It is comprised of 2816 SPUs, 176 Texture Address Units, 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 390X 8G		13555 points
Radeon R9 270X		6590 points
	Difference: 6965 (106%)

Zcash Mining Hash Rate

Radeon R9 390X 8G		330 Sol/s
Radeon R9 270X		177 Sol/s
	Difference: 153 (86%)

Ethereum Mining Hash Rate

Radeon R9 390X 8G		32 Mh/s
Radeon R9 270X		18 Mh/s
	Difference: 14 (78%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270X		180 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 95 Watts (53%)

Memory Bandwidth

In theory, the Radeon R9 390X 8G will be 114% faster than the Radeon R9 270X in general, because of its higher bandwidth. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon R9 270X		179200 MB/sec
	Difference: 204800 (114%)

Texel Rate

The Radeon R9 390X 8G will be quite a bit (more or less 131%) more effective at anisotropic filtering than the Radeon R9 270X. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon R9 270X		80000 Mtexels/sec
	Difference: 104800 (131%)

Pixel Rate

The Radeon R9 390X 8G will be quite a bit (more or less 110%) more effective at anti-aliasing than the Radeon R9 270X, and should be capable of handling higher resolutions while still performing well. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon R9 270X		32000 Mpixels/sec
	Difference: 35200 (110%)

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 maximum amount of data (counted in MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, the result should 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, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.