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Nvidia Titan X vs Radeon R9 390X 8G


Intro

The Nvidia Titan X has core speeds of 1417 MHz on the GPU, and 1251 MHz on the 12288 MB of GDDR5X RAM. It features 3584 SPUs along with 224 TAUs and 96 Rasterization Operator Units.

Compare those specifications to the Radeon R9 390X 8G, which uses a 28 nm design. AMD has clocked the core speed at 1050 MHz. The GDDR5 memory is set to run at a speed of 1500 MHz on this specific model. It features 2816 SPUs along with 176 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

As far as performance goes, the Nvidia Titan X should in theory be a lot better than the Radeon R9 390X 8G overall. (explain)

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

Texel Rate

The Nvidia Titan X should be much (approximately 72%) more effective at texture filtering than the Radeon R9 390X 8G. (explain)

Nvidia Titan X 317408 Mtexels/sec
Radeon R9 390X 8G 184800 Mtexels/sec
Difference: 132608 (72%)

Pixel Rate

The Nvidia Titan X is much (approximately 102%) better at anti-aliasing than the Radeon R9 390X 8G, and capable of handling higher resolutions better. (explain)

Nvidia Titan X 136032 Mpixels/sec
Radeon R9 390X 8G 67200 Mpixels/sec
Difference: 68832 (102%)

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 390X 8G

Specifications

Display Specifications

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Model Nvidia Titan X Radeon R9 390X 8G
Manufacturer nVidia AMD
Year August 2016 June 2015
Code Name GP102-400 Grenada XT
Memory 12288 MB 8192 MB
Core Speed 1417 MHz 1050 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 184800 Mtexels/sec
Pixel Rate 136032 Mpixels/sec 67200 Mpixels/sec
Unified Shaders 3584 2816
Texture Mapping Units 224 176
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: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 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 higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Nvidia Titan X

Radeon R9 390X 8G

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