Radeon R9 290X vs Radeon R9 390X 8G

Intro

Compare that to the Radeon R9 390X 8G, which has GPU clock speed of 1050 MHz, and 8192 MB of GDDR5 RAM set to run at 1500 MHz through a 512-bit bus. It also features 2816 Stream Processors, 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 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

In theory, the Radeon R9 390X 8G is 20% quicker than the Radeon R9 290X in general, because of its greater bandwidth. (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 a lot (more or less 31%) better at 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

The Radeon R9 390X 8G is a lot (approximately 31%) more effective at anti-aliasing than the Radeon R9 290X, and will be able to handle higher resolutions better. (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 maximum amount of information (measured in MB per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher 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 that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.