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GeForce GTX 1080 vs Radeon R9 390X 8G


Intro

The GeForce GTX 1080 comes with a GPU core clock speed of 1607 MHz, and the 8192 MB of GDDR5X RAM runs at 1251 MHz through a 256-bit bus. It also features 2560 SPUs, 160 Texture Address Units, and 64 Raster Operation Units.

Compare all that to the Radeon R9 390X 8G, which makes use of a 28 nm design. AMD has set the core frequency at 1050 MHz. The GDDR5 memory works at a speed of 1500 MHz on this specific card. It features 2816 SPUs along with 176 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

GeForce GTX 1080 22050 points
Radeon R9 390X 8G 13550 points
Difference: 8500 (63%)

Zcash Mining Hash Rate

GeForce GTX 1080 553 Sol/s
Radeon R9 390X 8G 330 Sol/s
Difference: 223 (68%)

Ethereum Mining Hash Rate

Radeon R9 390X 8G 32 Mh/s
GeForce GTX 1080 20 Mh/s
Difference: 12 (60%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 1080 180 Watts
Radeon R9 390X 8G 275 Watts
Difference: 95 Watts (53%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390X 8G should be 17% faster than the GeForce GTX 1080 overall, because of its higher data rate. (explain)

Radeon R9 390X 8G 384000 MB/sec
GeForce GTX 1080 327680 MB/sec
Difference: 56320 (17%)

Texel Rate

The GeForce GTX 1080 will be much (more or less 39%) faster with regards to AF than the Radeon R9 390X 8G. (explain)

GeForce GTX 1080 257120 Mtexels/sec
Radeon R9 390X 8G 184800 Mtexels/sec
Difference: 72320 (39%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 1080 is superior to the Radeon R9 390X 8G, by a large margin. (explain)

GeForce GTX 1080 102848 Mpixels/sec
Radeon R9 390X 8G 67200 Mpixels/sec
Difference: 35648 (53%)

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

GeForce GTX 1080

Radeon R9 390X 8G

Specifications

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Model GeForce GTX 1080 Radeon R9 390X 8G
Manufacturer nVidia AMD
Year May 2016 June 2015
Code Name GP104-400 Grenada XT
Memory 8192 MB 8192 MB
Core Speed 1607 MHz 1050 MHz
Memory Speed 10008 MHz 6000 MHz
Power (Max TDP) 180 watts 275 watts
Bandwidth 327680 MB/sec 384000 MB/sec
Texel Rate 257120 Mtexels/sec 184800 Mtexels/sec
Pixel Rate 102848 Mpixels/sec 67200 Mpixels/sec
Unified Shaders 2560 2816
Texture Mapping Units 160 176
Render Output Units 64 64
Bus Type GDDR5X GDDR5
Bus Width 256-bit 512-bit
Fab Process 16 nm 28 nm
Transistors 7200 million 6200 million
Bus PCIe 3.0 x16 PCIe 3.0 ×16
DirectX Version DirectX 12.0 DirectX 12.0
OpenGL Version OpenGL 4.5 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, the result should 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 AA, High Dynamic Range and higher screen 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 amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

GeForce GTX 1080

Radeon R9 390X 8G

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