Radeon R9 290X vs Radeon R9 390X 8G

Intro

Compare all of that to the Radeon R9 390X 8G, which has core 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 Rasterization Operator 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 290X		10609 points
	Difference: 2946 (28%)

Zcash Mining Hash Rate

Radeon R9 290X		369 Sol/s
Radeon R9 390X 8G		330 Sol/s
	Difference: 39 (12%)

Ethereum Mining Hash Rate

Radeon R9 390X 8G		32 Mh/s
Radeon R9 290X		29 Mh/s
	Difference: 3 (10%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 390X 8G		275 Watts
Radeon R9 290X		300 Watts
	Difference: 25 Watts (9%)

Memory Bandwidth

The Radeon R9 390X 8G should theoretically perform a little bit faster than the Radeon R9 290X overall. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon R9 290X		320000 MB/sec
	Difference: 64000 (20%)

Texel Rate

The Radeon R9 390X 8G should be quite a bit (approximately 31%) faster with regards to AF than the Radeon R9 290X. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon R9 290X		140800 Mtexels/sec
	Difference: 44000 (31%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 390X 8G is the winner, and very much so. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon R9 290X		51200 Mpixels/sec
	Difference: 16000 (31%)

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 information (counted in MB per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better 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 most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock speed of the card. 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 bandwidth is, the lower the ability to reach the max fill rate.