AMD's approach to new generations of graphics processors has been different for the past two generations. The Radeon R9 200 series initially saw the introduction of just one silicon, codenamed "Hawaii," which drove the company's previous flagship R9 290 series, while the rest of the lineup saw a cascading re-badging from the previous generation. AMD's previous generation flagship, the HD 7900 series, went on to become the performance-segment R9 280 series, and so on, and the performance-segment "Tonga" silicon was added afterward. The story is predictable even today.
With this generation, there is essentially one new silicon, the HBM-equipped "Fiji," which has been launched this week and will eventually drive up to five products from AMD. The previous-generation flagship silicon "Hawaii" now drives AMD's performance-segment products, the Radeon R9 390X and R9 390 Non-X we're reviewing today.
The Radeon R9 390 is based on the "Hawaii" silicon (now referred to as "Grenada" without any silicon changes) and features the same core-configuration as the R9 290. The standard memory amount has been doubled to 8 GB across the board and clock speeds see an increase from 950 MHz to 1000 MHz on the core and from 5.00 Gbps to 6.00 Gbps on the memory.
The PowerColor R9 390 PCS+ comes with a small core overclock of 10 MHz out of the box; its memory clock remains unchanged. As a cooling solution, a mighty triple slot, triple-fan cooler is used. Price-wise, the card is retailing with a slight $10 increase over the reference design.
R9 390 PCS+
GTX 780 Ti
|Memory Size||2048 MB||3072 MB||3072 MB||4096 MB||8192 MB||8192 MB||4096 MB||4096 MB||8192 MB||3072 MB|
|Memory Bus Width||256 bit||384 bit||384 bit||512 bit||512 bit||512 bit||256 bit||512 bit||512 bit||384 bit|
|Core Clock||1046 MHz+||1000 MHz||863 MHz+||947 MHz||1000 MHz||1010 MHz||1051 MHz+||1000 MHz||1050 MHz||876 MHz+|
|Memory Clock||1753 MHz||1500 MHz||1502 MHz||1250 MHz||1500 MHz||1500 MHz||1750 MHz||1250 MHz||1500 MHz||1750 MHz|