AMD Radeon RX 7900 XT printed circuit board imaged

An alleged blueprint of the circuit board of AMD’s Radeon RX 7900 XT, the suspected top-of-the-line model of RDNA 3, has been imaged at Igor’s Lab.

The German hardware journalist Igor Walllossek again shared his own illustration of what he had heard about the video card. A few months ago, the exact same thing happened with Nvidia’s RTX 4090, albeit more speculative at the time.

Walllossek explicitly doesn’t want to get involved in the messy rumor mill about the new graphics cards, but simply shares what he’s seen and verified so far about AMD’s new offering — the party that hasn’t been heard much about in recent months. Of course, the details can change from day to day, but the blueprint below would be based on multiple reliable, internal sources.

The Navi 31 GPU is clearly visible in the middle of the circuit board, consisting of 7 chiplets — something that was often assured months ago. The GPU runs on one central graphics core, surrounded by six memory controllers. Walllossek compliments the “Twitter kings and their data”, which the German said turned out to be quite accurate.

In addition, Walllossek is sure to use at least 12 GDDR6 memory modules, “suggesting a memory expansion up to 24 GB”. In the previous RDNA generation, AMD’s video memory capped at 16 GB, with no indication of an alleged increase with RDNA 3.

In addition, the power supply is striking: according to Wallosek, it would currently be supplied via three 8-pin connectors. The journalist points out that the new 12VHPWR connector — the new 16-pin connector to PCIe 5.0 standard — cannot be ruled out, but that AMD’s internal design is still based on traditional cables and connectors.

Three times the 8-pin connector (with 150 watts per cable), together with the motherboard slot (75 watts), equates to a maximum TGP of 525 watts. Indeed, in an interview last summer, AMD admitted that RDNA 3 consumes more than RDNA 2, but that it would be more efficient than its competitor’s new architecture, Nvidia’s Ada Lovelace generation. A TGP of 450 watts (or slightly more) is about what is currently expected from Nvidia’s heaviest GPU, but nothing is certain for the time being.

The few certainties are in AMD’s earlier promises. The chip manufacturer had previously indicated that the RDNA 3 GPUs (Radeon RX 7000), just like the Zen 4 CPUs (Ryzen 7000), are baked on the 5 nm process of TSMC, with a planned appearance in at least 2022. .

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