Radeon R9 380X vs Radeon R9 390X 8G

Intro

Compare all of that to the Radeon R9 390X 8G, which makes use of a 28 nm design. AMD has set the core speed at 1050 MHz. The GDDR5 memory is set to run at a frequency of 1500 MHz on this specific model. It features 2816 SPUs as well as 176 TAUs 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 390X 8G		13555 points
Radeon R9 380X		9519 points
	Difference: 4036 (42%)

Ethereum Mining Hash Rate

Radeon R9 390X 8G		32 Mh/s
Radeon R9 380X		19 Mh/s
	Difference: 13 (68%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

As far as performance goes, the Radeon R9 390X 8G should theoretically be quite a bit better than the Radeon R9 380X overall. (explain)

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

Texel Rate

The Radeon R9 390X 8G is much (about 49%) better at texture filtering than the Radeon R9 380X. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon R9 380X		124160 Mtexels/sec
	Difference: 60640 (49%)

Pixel Rate

The Radeon R9 390X 8G will be much (about 116%) faster with regards to full screen anti-aliasing than the Radeon R9 380X, and also will be able to handle higher resolutions better. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon R9 380X		31040 Mpixels/sec
	Difference: 36160 (116%)

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 data (measured in MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.