Radeon R7 250X vs Radeon R9 390 8G

Intro

Compare those specs to the Radeon R9 390 8G, which features GPU core speed of 1000 MHz, and 8192 MB of GDDR5 memory running at 1500 MHz through a 512-bit bus. It also features 2560 SPUs, 160 TAUs, 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 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

In theory, the Radeon R9 390 8G will be 433% quicker than the Radeon R7 250X overall, due to its greater data rate. (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 (more or less 300%) faster with regards to anisotropic 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 much (about 300%) faster with regards to anti-aliasing than the Radeon R7 250X, and also able to handle higher resolutions without slowing down too much. (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 max amount of information (measured in megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.