Radeon R9 295X2 vs Radeon R9 390 8G

Intro

Compare those specifications to the Radeon R9 390 8G, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM is set to run at a frequency of 1500 MHz on this card. It features 2560 SPUs as well as 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 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

In theory, the Radeon R9 295X2 will be 67% quicker than the Radeon R9 390 8G overall, due to its greater data rate. (explain)

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

Texel Rate

The Radeon R9 295X2 will be quite a bit (approximately 124%) more effective at 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

The Radeon R9 295X2 will be much (approximately 104%) faster with regards to FSAA than the Radeon R9 390 8G, and also should be able to handle higher resolutions more effectively. (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 max 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 interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics 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 most pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.