Radeon R7 250X vs Radeon R9 390 8G

Intro

Compare those specifications to the Radeon R9 390 8G, which comes with GPU core speed of 1000 MHz, and 8192 MB of GDDR5 memory set to run at 1500 MHz through a 512-bit bus. It also features 2560 SPUs, 160 TAUs, 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 390 8G		12733 points
Radeon R7 250X		2860 points
	Difference: 9873 (345%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X		95 Watts
Radeon R9 390 8G		275 Watts
	Difference: 180 Watts (189%)

Memory Bandwidth

The Radeon R9 390 8G should in theory be much faster than the Radeon R7 250X overall. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon R7 250X		72000 MB/sec
	Difference: 312000 (433%)

Texel Rate

The Radeon R9 390 8G should be much (approximately 300%) more effective at texture filtering than the Radeon R7 250X. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon R7 250X		40000 Mtexels/sec
	Difference: 120000 (300%)

Pixel Rate

The Radeon R9 390 8G will be quite a bit (about 300%) faster with regards to full screen anti-aliasing than the Radeon R7 250X, and able to handle higher screen resolutions better. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon R7 250X		16000 Mpixels/sec
	Difference: 48000 (300%)

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 maximum amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core 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 rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.