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Nvidia Titan X vs Radeon R9 390 8G


Intro

The Nvidia Titan X makes use of a 16 nm design. nVidia has clocked the core speed at 1417 MHz. The GDDR5X RAM works at a speed of 1251 MHz on this specific model. It features 3584 SPUs as well as 224 TAUs and 96 ROPs.

Compare those specs to the Radeon R9 390 8G, which features a GPU core clock speed of 1000 MHz, and 8192 MB of GDDR5 RAM set to run at 1500 MHz through a 512-bit bus. It also is comprised of 2560 SPUs, 160 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Nvidia Titan X 250 Watts
Radeon R9 390 8G 275 Watts
Difference: 25 Watts (10%)

Memory Bandwidth

Theoretically speaking, the Nvidia Titan X should be 28% quicker than the Radeon R9 390 8G overall, due to its higher data rate. (explain)

Nvidia Titan X 491520 MB/sec
Radeon R9 390 8G 384000 MB/sec
Difference: 107520 (28%)

Texel Rate

The Nvidia Titan X is quite a bit (more or less 98%) faster with regards to anisotropic filtering than the Radeon R9 390 8G. (explain)

Nvidia Titan X 317408 Mtexels/sec
Radeon R9 390 8G 160000 Mtexels/sec
Difference: 157408 (98%)

Pixel Rate

The Nvidia Titan X is quite a bit (more or less 113%) better at full screen anti-aliasing than the Radeon R9 390 8G, and should be able to handle higher screen resolutions while still performing well. (explain)

Nvidia Titan X 136032 Mpixels/sec
Radeon R9 390 8G 64000 Mpixels/sec
Difference: 72032 (113%)

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

Nvidia Titan X

Radeon R9 390 8G

Specifications

Display Specifications

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Model Nvidia Titan X Radeon R9 390 8G
Manufacturer nVidia AMD
Year August 2016 June 2015
Code Name GP102-400 Grenada PRO
Memory 12288 MB 8192 MB
Core Speed 1417 MHz 1000 MHz
Memory Speed 10008 MHz 6000 MHz
Power (Max TDP) 250 watts 275 watts
Bandwidth 491520 MB/sec 384000 MB/sec
Texel Rate 317408 Mtexels/sec 160000 Mtexels/sec
Pixel Rate 136032 Mpixels/sec 64000 Mpixels/sec
Unified Shaders 3584 2560
Texture Mapping Units 224 160
Render Output Units 96 64
Bus Type GDDR5X GDDR5
Bus Width 384-bit 512-bit
Fab Process 16 nm 28 nm
Transistors 12000 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: Bandwidth is the maximum amount of data (counted in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core 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 applied per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Nvidia Titan X

Radeon R9 390 8G

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