AMD Radeon HD 7990 vs R9 380X
Comparison of Radeon HD 7990 and Radeon R9 380X architecture, market type and release date.
Radeon HD 7990 and Radeon R9 380X's general performance parameters such as number of shaders, GPU core clock, manufacturing process, texturing and calculation speed. These parameters indirectly speak of Radeon HD 7990 and Radeon R9 380X's performance, but for precise assessment you have to consider its benchmark and gaming test results.
Core clock speed
Manufacturing process technology
Power consumption (TDP)
Texture fill rate
2x 128.0 GTexel / s billion / sec
124.2 GTexel / s
2x 4,096 gflops
Compatibility, dimensions and requirements
Information on Radeon HD 7990 and Radeon R9 380X compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop video cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).
PCIe 3.0 x16
PCIe 3.0 x16
Full Height / Full Length
Supplementary power connectors
2 x 6-pin
Parameters of memory installed on Radeon HD 7990 and Radeon R9 380X: its type, size, bus, clock and resulting bandwidth. Note that GPUs integrated into processors don't have dedicated memory and use a shared part of system RAM.
High bandwidth memory (HBM)
Maximum RAM amount
2x 3 GB
Memory bus width
2x 384 Bit
Memory clock speed
2x 288.0 GB / s
182.4 GB / s
Video outputs and ports
Types and number of video connectors present on Radeon HD 7990 and Radeon R9 380X.
1x DVI, 4x mini-DisplayPort
2x DVI, 1x HDMI, 1x DisplayPort
Number of Eyefinity displays
Technological solutions and APIs supported by Radeon HD 7990 and Radeon R9 380X. You'll probably need this information if you need some particular technology for your purposes.
APIs supported by Radeon HD 7990 and Radeon R9 380X, sometimes including their particular versions.
Non-gaming benchmarks performance of Radeon HD 7990 and Radeon R9 380X. Note that overall benchmark performance is measured in points in 0-100 range.
Overall benchmark performance
HD 7990 25.95
R9 380X 29.04 +11.9%
3DMark Fire Strike Graphics
HD 7990 15540 +63.4%
R9 380X 9510
HD 7990 5544
R9 380X 6204 +11.9%
Cryptocurrency mining performance of Radeon HD 7990 and Radeon R9 380X. Usually measured in megahashes per second.
Bitcoin / BTC (SHA256)
Decred / DCR (Decred)
Ethereum / ETH (DaggerHashimoto)
44 Mh/s +113.3%
20.63 Mh/s −113.3%
Monero / XMR (CryptoNight)
Zcash / ZEC (Equihash)
Game benchmarks comparison
Let's see how good Radeon HD 7990 and Radeon R9 380X are for gaming. Particular gaming benchmark results are measured in FPS.
Advantages of AMD Radeon HD 7990
Wider memory bus (384 vs 64 bit)
Higher memory bandwidth (288 vs 182.4 GB/s)
Advantages of AMD Radeon R9 380X
11.9% faster in synthetic tests
Much newer (19 November 2015 vs 24 April 2013)
Cheaper ($229 vs $999)
Less power hungry (190 vs 375 watts)
Mantle (an API developed by AMD for 3D graphics acceleration. Discontinued and later superceded by Vulkan)
Eyefinity (allows using several displays with an AMD GPU)
PowerTune (dynamically increases AMD GPU's voltage and frequency while there's still enough temperature headroom. Similar to NVIDIA GPU Boost)
Vulkan (a contemporary API for graphics acceleration, based on now-discontinued Mantle)
So, HD 7990 or R9 380X?
Judging by the results of synthetic and gaming tests, Technical City recommends AMD Radeon R9 380X.
Should you still have questions on choice between Radeon HD 7990 and Radeon R9 380X, ask them in Comments section, and we shall answer.