Radeon R9 390

The Radeon R9 390 video card is essentially the same R9 290. The Hawaii graphics processor, although it was renamed Grenada, was in fact produced according to the same 28-nanometer process technology and included an identical number of functional blocks.

In the case of the R9 390, we are talking about 2560 stream computers, 160 texture units and 64 rasterization units. At the same time, the recommended GPU clock frequency was increased from 947 MHz to 1000 MHz (+5.6%). The new adapter retained the 512-bit memory bus, but the operating frequency of the GDDR5 chips was also increased, and significantly - up to 6000 MHz, instead of the 5000 MHz recommended for the Radeon R9 290.

Another noticeable difference from its predecessor is that all video cards of the Radeon R9 390 line were offered with 8 GB of memory, while the R9 290 was equipped with 4 GB of local RAM. Doubling the amount of memory and increasing its bandwidth by 20% could be considered a hint at the ability to use the Radeon R9 390 for modes above 1440p. AMD marketing brochures noted the possibility of a comfortable game at 4K resolution.

Radeon R9 390 Specifications

Even after increasing the operating frequencies and doubling the amount of memory, the reference Radeon R9 390 managed to keep the thermal package within 275 watts. To connect additional power, two connectors were provided - 6- and 8-pin.