Radeon R9 280 vs Radeon R9 390X 8G

Intro

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

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 280		7961 points
	Difference: 5594 (70%)

Zcash Mining Hash Rate

Radeon R9 390X 8G		330 Sol/s
Radeon R9 280		183 Sol/s
	Difference: 147 (80%)

Ethereum Mining Hash Rate

Radeon R9 390X 8G		32 Mh/s
Radeon R9 280		22 Mh/s
	Difference: 10 (45%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 280		250 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 25 Watts (10%)

Memory Bandwidth

The Radeon R9 390X 8G should theoretically be much faster than the Radeon R9 280 overall. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon R9 280		240000 MB/sec
	Difference: 144000 (60%)

Texel Rate

The Radeon R9 390X 8G will be a lot (more or less 77%) more effective at anisotropic filtering than the Radeon R9 280. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon R9 280		104496 Mtexels/sec
	Difference: 80304 (77%)

Pixel Rate

If running with 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 280		29856 Mpixels/sec
	Difference: 37344 (125%)

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 largest amount of data (counted in MB per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics 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 number of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs 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 rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.