The AMD Radeon R9 390X is nothing really new, it's a rebranding of the Radeon R9 290X with the same Hawaii-based GPU that was released in October 2013. What AMD has done with it, is a couple of tweaks here and there, which we've compared an R9 290X 8GB card in our benchmarks specifically.
We have a 28nm-based Hawaii GPU with 2816 stream processors, 64 ROPs, and 176 TMUs. AMD has kept the 512-bit wide memory bus, and with its 8GB of GDDR5 VRAM clocked at 6.1GHz, we have memory bandwidth set at 390.4GB/sec. We have a pixel fillrate of 70.4 GPixel/s, and a texture fillrate of 193.6 GTexel/s.
MSI has the GPU clock at 1.1GHz, while the memory is at 1525MHz, or 6.1GHz.
MSI has a world class cooler on its hands with the Twin Frozr V, which it has used on the Radeon R9 390X Gaming 8G. It features a quad heat pipe system that has two very large heat sinks cooling down everything from the Grenada XT core, to the RAM and VRMs.
You can see the dual heat sink design underneath the fan, sure to keep that Grenada XT core nice and cool.
The end of the card teases the four heat pipes, and the cable tucked very neatly away that powers the two fans.
Another look at the heat sink, from the front of the card.
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