Radeon R9 270X vs Radeon R9 390 8G

Intro

Compare that to the Radeon R9 390 8G, which comes with core clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 memory. It features 2560 SPUs as well as 160 Texture Address Units and 64 ROPs.

Display Graphs

Hide Graphs

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 R9 270X		6590 points
	Difference: 6143 (93%)

Zcash Mining Hash Rate

Radeon R9 390 8G		326 Sol/s
Radeon R9 270X		177 Sol/s
	Difference: 149 (84%)

Ethereum Mining Hash Rate

Radeon R9 390 8G		28 Mh/s
Radeon R9 270X		18 Mh/s
	Difference: 10 (56%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

The Radeon R9 390 8G should theoretically perform quite a bit faster than the Radeon R9 270X in general. (explain)

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

Texel Rate

The Radeon R9 390 8G is much (more or less 100%) faster with regards to texture filtering than the Radeon R9 270X. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon R9 270X		80000 Mtexels/sec
	Difference: 80000 (100%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 390 8G is a better choice, by far. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon R9 270X		32000 Mpixels/sec
	Difference: 32000 (100%)

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 maximum amount of information (counted in megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

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