Radeon R9 380 4G vs Radeon R9 390X 8G

Intro

Compare those specifications to the Radeon R9 390X 8G, which features a clock frequency of 1050 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 512-bit memory bus, and makes use of a 28 nm design. It is comprised of 2816 SPUs, 176 Texture Address Units, and 64 Raster Operation 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.

Ethereum Mining Hash Rate

Radeon R9 390X 8G		32 Mh/s
Radeon R9 380 4G		21 Mh/s
	Difference: 11 (52%)

3DMark Fire Strike Graphics Score

Radeon R9 390X 8G		13555 points
Radeon R9 380 4G		8837 points
	Difference: 4718 (53%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380 4G		190 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 85 Watts (45%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390X 8G should be quite a bit faster than the Radeon R9 380 4G in general. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon R9 380 4G		182400 MB/sec
	Difference: 201600 (111%)

Texel Rate

The Radeon R9 390X 8G will be a lot (about 70%) better at anisotropic filtering than the Radeon R9 380 4G. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon R9 380 4G		108640 Mtexels/sec
	Difference: 76160 (70%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 390X 8G is a better choice, by a large margin. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon R9 380 4G		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 max amount of information (measured in MB per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at handling 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 card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.