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Nvidia Titan X vs Radeon R9 390X 8G

Intro

The Nvidia Titan X uses a 16 nm design. nVidia has set the core frequency at 1417 MHz. The GDDR5X RAM works at a frequency of 1251 MHz on this card. It features 3584 SPUs as well as 224 Texture Address Units and 96 ROPs.

Compare those specifications to the Radeon R9 390X 8G, which comes with core speeds of 1050 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 RAM. It features 2816 SPUs as well as 176 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 390X 8G 275 Watts
Difference: 25 Watts (10%)

Memory Bandwidth

Theoretically speaking, the Nvidia Titan X will be 28% faster than the Radeon R9 390X 8G in general, because of its higher bandwidth. (explain)

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

Texel Rate

The Nvidia Titan X is quite a bit (approximately 72%) faster with regards to 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

If running with a high resolution is important to you, then the Nvidia Titan X is a better choice, by a large margin. (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

Hide Specifications

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 largest amount of information (in units of MB per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the video 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 maximum number of pixels that the graphics 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 Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Nvidia Titan X

Radeon R9 390X 8G

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