Radeon R9 295X2 vs Radeon R9 390 8G

Intro

Compare all that to the Radeon R9 390 8G, which has clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 RAM. It features 2560 SPUs as well as 160 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 390 8G		12733 points
	Difference: 8472 (67%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Performance-wise, the Radeon R9 295X2 should theoretically be much better than the Radeon R9 390 8G overall. (explain)

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

Texel Rate

The Radeon R9 295X2 should be quite a bit (more or less 124%) faster with regards to texture filtering than the Radeon R9 390 8G. (explain)

Radeon R9 295X2		358336 Mtexels/sec
Radeon R9 390 8G		160000 Mtexels/sec
	Difference: 198336 (124%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 295X2 is a better choice, by a large margin. (explain)

Radeon R9 295X2		130304 Mpixels/sec
Radeon R9 390 8G		64000 Mpixels/sec
	Difference: 66304 (104%)

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: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the 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 most pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.