Since AMD’s RX 5600 XT release in mid-January 2019, we’ve seen card partners exercise the option to increase memory speeds and carve out new SKUs for additional performance. The ASRock RX 5600 XT Phantom Gaming D3 we have for review received a BIOS update listing increased performance, however, it increased the core speeds and left the memory alone at the lower 12 Gbps rate. We’ll see how this configuration compares to the Gigabyte RX 5600 XT Gaming OC and its 14 Gbps RAM, along with the Asus ROG Strix RX 5600 XT O6G Gaming using reference clocked RAM speeds, and the Sapphire RX 5600 XT Pulse with 14 Gbps memory that was widely sampled for the 5600 XT launch.
Outside of the clock speeds, the biggest differences between the cards comes down to the cooler. All three use a triple-fan cooling solution to keep the cards running within specification, but they are not created equal. Both the ASRock and Asus heatsinks are larger (2.5-plus slots wide) than the Gigabyte solution, and the Gigabyte Windforce 3 cooler uses five heatpipes while the Asus and ASRock use six.
There are some other differences, including core clocks and power delivery, which we’ll look into as well. The Gigabyte Gaming OC is priced at $299.99, Asus O6G Gaming $339.99, and the ASRock Phantom Gaming D3 sits between them at $309.99. The Sapphire RX 5600 XT Pulse is supposed to cost $289.99, but not surprisingly it’s often out of stock at that price. For this review, we’ll target performance differences in frames per second (fps) as well as the cooling properties and power consumption of the three cards.
All the AMD Radeon RX 5600 XTs we’ve compared use the same Navi 10 silicon below the heatsink. The die is manufactured on TSMC’s 7nm FinFET process, with 10.3 billion transistors squeezed onto a 251 mm² die. It comes with 6GB of GDDR6 sitting on a 192-bit bus, which is enough for 1080p ultra gaming and most titles at 1440p.
Clock speeds on the ASRock RX 5600 XT Phantom Gaming D3 are set at 1,670 MHz (Game Clock) and 1,750 MHz (Boost clock). In most cases, clock speeds will end up much closer to the Game Clock than Boost clock. AMD tends to list a maximum speed while Nvidia boost clocks are more of a minimum. The base memory speed on the Phantom Gaming is 1,500 MHz (12 Gbps). This is still the reference specification for the GPU, though other card partners bumped the memory up to 1,750 MHz (14 Gbps) extracting a bit more performance out of the cards in doing so.
AMD lists the RX 5600 XT Total Board Power (TBP) as 150W in reference form. Actual power use will vary between partner cards due to clock speeds, fans and other minor differences. ASRock doesn’t list a TDP for its card, though like AMD it recommends at least a 450W power supply. A single 8-pin PCIe connector is required.