Radeon R9 270X vs Radeon R9 390X 8G

Intro

Compare all that to the Radeon R9 390X 8G, which features clock speeds of 1050 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 RAM. It features 2816 SPUs along with 176 TAUs and 64 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.

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

Performance-wise, the Radeon R9 390X 8G should theoretically be much superior to the Radeon R9 270X overall. (explain)

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

Texel Rate

The Radeon R9 390X 8G is much (approximately 131%) faster with regards to 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 is quite a bit (approximately 110%) better at full screen anti-aliasing than the Radeon R9 270X, and also should be capable of handling higher screen resolutions without losing too much performance. (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 max amount of data (in units of megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once 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 number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. 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 lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.