Radeon R9 290X vs Radeon R9 390X 8G

Intro

Compare all that to the Radeon R9 390X 8G, which features GPU clock speed of 1050 MHz, and 8192 MB of GDDR5 memory running at 1500 MHz through a 512-bit bus. It also is made up of 2816 Stream Processors, 176 Texture Address Units, 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 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

Performance-wise, the Radeon R9 390X 8G should theoretically be just a bit superior to the Radeon R9 290X in general. (explain)

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

Texel Rate

The Radeon R9 390X 8G is 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 a high screen resolution is important to you, then the Radeon R9 390X 8G is superior to the Radeon R9 290X, by a large margin. (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: Memory bandwidth is the max amount of information (in units of MB per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

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