Radeon R9 295X2 vs Radeon R9 390X 8G

Intro

Compare that to the Radeon R9 390X 8G, which comes with clock speeds of 1050 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 memory. 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

The Radeon R9 295X2 should in theory perform a lot faster than the Radeon R9 390X 8G in general. (explain)

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

Texel Rate

The Radeon R9 295X2 should be a lot (more or less 94%) faster with regards to AF 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

The Radeon R9 295X2 should be quite a bit (about 94%) more effective at anti-aliasing than the Radeon R9 390X 8G, and should be capable of handling higher screen resolutions while still performing well. (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 information (measured in MB per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.