Review: AMD Radeon RX 7900 XT and RX 7900 XTX


Specifications and PCB:

Technical specifications:

In terms of frequency, let’s start with the RX 7900 XT. The basic one is announced at 2025 MHz while the Boost is at 2499 MHz. The 20 GB of G-DDR6 memory runs at 2500 MHz (800 GB/s) on a 320 bit bus. As for the RX 7900 XTX, the basic one is announced at 2270 MHz while the Boost is at 2499 MHz. The 24 GB of G-DDR6 memory run at 2500 MHz (960 GB/s) on a 384 bit bus.

A small passage through GPU-Z to check that the information read is correct. Don’t forget that the latter will be superior during the benchmarks depending on the quality of your chip and the cooling system.

Let’s unpack the PCB:

The novelty of this architecture is the design based on the addition of MCD (Memory Cache Die), also called memory chiplets. This design with its two distinct parts reminds us of the AMD processors. The PCB below is the one of the Radeon RX 7900 XTX.

We find the GCD(Graphic Compute Die) engraved in 5 nm with a size of 300 mm ² and then five or six MCD (Memory Cache Die) also called memory chiplets that are engraved in 6 nm. Each one occupies a surface of 37 mm².

We have not yet received information from AMD regarding the number of phases of these two PCBs. We will update these specifications as soon as we receive them.