Radeon R9 380X vs Radeon R9 390 8G

Intro

Compare those specifications to the Radeon R9 390 8G, which makes use of a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 memory works at a frequency of 1500 MHz on this particular card. It features 2560 SPUs as well as 160 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

Hide Graphs

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 380X		9519 points
	Difference: 3214 (34%)

Ethereum Mining Hash Rate

Radeon R9 390 8G		28 Mh/s
Radeon R9 380X		19 Mh/s
	Difference: 9 (47%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380X		190 Watts
Radeon R9 390 8G		275 Watts
	Difference: 85 Watts (45%)

Memory Bandwidth

As far as performance goes, the Radeon R9 390 8G should theoretically be a lot superior to the Radeon R9 380X in general. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon R9 380X		182400 MB/sec
	Difference: 201600 (111%)

Texel Rate

The Radeon R9 390 8G should be much (more or less 29%) better at AF than the Radeon R9 380X. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon R9 380X		124160 Mtexels/sec
	Difference: 35840 (29%)

Pixel Rate

The Radeon R9 390 8G will be much (about 106%) faster with regards to FSAA than the Radeon R9 380X, and also will be capable of handling higher resolutions while still performing well. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon R9 380X		31040 Mpixels/sec
	Difference: 32960 (106%)

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 largest amount of information (in units of MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better 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 number of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total number of 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 applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in one 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 filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.