The AMD R9 390X 8GB Performance Review

Author: SKYMTL
Date: June 17, 2015
Product Name: Sapphire R9 390X Tri-X OC
Part Number: 11241-00
Warranty: 3 Years
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Performance Consistency & Temperatures Over Time

Being based upon the hot-running and throttle-prone R9 290X, the R9 390X could very well fall into the same problems as its predecessor. However, Sapphire has added a mammoth heatsink which should contribute to lower temperatures and better clock speed consistency despite the Grenada core operating at higher speeds.

This is a ringing endorsement of Sapphire’s heatsink engineering if there ever was one. Temperatures remained tightly controlled throughout our test, never reaching over 72°C. Compare and contrast that to the reference R9 290X and the difference is like night and day.

The results here once again speak for themselves. While the reference R9 290X needed to reduce its frequencies in order to properly balance thermal loads and power consumption, this particular R9 390X does not. It consistently runs at 1055MHz. Since all of these new cards will use custom designs, we’re willing to bet these numbers remain consistent regardless of the SKU.

Performance numbers are nothing short of spectacular with extremely linear frame delivery whereas the older R9 290X (in reference form at least) drops like a stone as temperatures increase.

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