Radeon R9 295X2 vs Radeon R9 390X 8G

Intro

Compare all of that to the Radeon R9 390X 8G, which uses a 28 nm design. AMD has set the core frequency at 1050 MHz. The GDDR5 RAM runs at a speed of 1500 MHz on this particular card. It features 2816 SPUs as well as 176 Texture Address Units 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 295X2		21205 points
Radeon R9 390X 8G		13555 points
	Difference: 7650 (56%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 390X 8G		275 Watts
Radeon R9 295X2		500 Watts
	Difference: 225 Watts (82%)

Memory Bandwidth

Performance-wise, the Radeon R9 295X2 should in theory be much superior to the Radeon R9 390X 8G overall. (explain)

Radeon R9 295X2		640000 MB/sec
Radeon R9 390X 8G		384000 MB/sec
	Difference: 256000 (67%)

Texel Rate

The Radeon R9 295X2 is much (approximately 94%) better at anisotropic filtering than the Radeon R9 390X 8G. (explain)

Radeon R9 295X2		358336 Mtexels/sec
Radeon R9 390X 8G		184800 Mtexels/sec
	Difference: 173536 (94%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 295X2 is a better choice, and very much so. (explain)

Radeon R9 295X2		130304 Mpixels/sec
Radeon R9 390X 8G		67200 Mpixels/sec
	Difference: 63104 (94%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of data (counted in MB per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 number of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 memory bandwidth is, the lower the potential to reach the max fill rate.