Geforce GTX 780 vs Radeon R9 390 8G

Intro

Compare those specs to the Radeon R9 390 8G, which comes with 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 390 8G		12733 points
Geforce GTX 780		10082 points
	Difference: 2651 (26%)

Ethereum Mining Hash Rate

Radeon R9 390 8G		28 Mh/s
Geforce GTX 780		20 Mh/s
	Difference: 8 (40%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 780		250 Watts
Radeon R9 390 8G		275 Watts
	Difference: 25 Watts (10%)

Memory Bandwidth

As far as performance goes, the Radeon R9 390 8G should in theory be a lot superior to the Geforce GTX 780 overall. (explain)

Radeon R9 390 8G		384000 MB/sec
Geforce GTX 780		288384 MB/sec
	Difference: 95616 (33%)

Texel Rate

The Geforce GTX 780 should be just a bit (more or less 4%) more effective at anisotropic filtering than the Radeon R9 390 8G. (explain)

Geforce GTX 780		165696 Mtexels/sec
Radeon R9 390 8G		160000 Mtexels/sec
	Difference: 5696 (4%)

Pixel Rate

The Radeon R9 390 8G will be much (more or less 54%) better at FSAA than the Geforce GTX 780, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Geforce GTX 780		41424 Mpixels/sec
	Difference: 22576 (54%)

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 largest amount of data (in units of MB per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the interface 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 ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total texture units by the core clock 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.