Radeon R9 290 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 RAM set to run at 1500 MHz through a 512-bit bus. It also is made up of 2816 SPUs, 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 290		9876 points
	Difference: 3679 (37%)

Zcash Mining Hash Rate

Radeon R9 390X 8G		330 Sol/s
Radeon R9 290		283 Sol/s
	Difference: 47 (17%)

Ethereum Mining Hash Rate

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

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically speaking, the Radeon R9 390X 8G should be 20% quicker than the Radeon R9 290 overall, because of its greater bandwidth. (explain)

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

Texel Rate

The Radeon R9 390X 8G will be much (approximately 44%) faster with regards to texture filtering than the Radeon R9 290. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon R9 290		128000 Mtexels/sec
	Difference: 56800 (44%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 390X 8G is the winner, by a large margin. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon R9 290		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 data (measured in MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 are processed in one second. This number is calculated by multiplying the total amount of 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.