Radeon R9 270 vs Radeon R9 390 8G

Intro

Compare those specs to the Radeon R9 390 8G, which features clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 RAM. It features 2560 SPUs as well as 160 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 390 8G		12733 points
Radeon R9 270		5943 points
	Difference: 6790 (114%)

Ethereum Mining Hash Rate

Radeon R9 390 8G		28 Mh/s
Radeon R9 270		15 Mh/s
	Difference: 13 (87%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270		150 Watts
Radeon R9 390 8G		275 Watts
	Difference: 125 Watts (83%)

Memory Bandwidth

Performance-wise, the Radeon R9 390 8G should theoretically be much better than the Radeon R9 270 in general. (explain)

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

Texel Rate

The Radeon R9 390 8G will be a lot (more or less 122%) better at AF than the Radeon R9 270. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon R9 270		72000 Mtexels/sec
	Difference: 88000 (122%)

Pixel Rate

The Radeon R9 390 8G should be quite a bit (approximately 122%) more effective at FSAA than the Radeon R9 270, and also able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon R9 270		28800 Mpixels/sec
	Difference: 35200 (122%)

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 (in units of megabytes per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 once again. If 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 amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total 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 processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.