Rumors: AMD Navi 21 "Big Navi" GPUs to feature 12GB and 16GB GDDR6 VRAM

Currently, we have relatively reliable information suggesting the large Navi GPU, specifically "Navi 21," will likely pack 80 compute units, totaling 5120 stream processors. This projection aligns with the formula seen in current Navi-based cards (like the Radeon RX 5700 XT).

Almost immediately after the "Navi 21" chip's rumored specs dropped, information emerged online suggesting AMD Radeon RX gaming graphics cards, based on the "Big Navi" GPU, will come in 12GB and 16GB GDDR6 VRAM configurations (with 384-bit and 512-bit memory bus widths, respectively).

Moreover, the well-known and generally reliable insider _rogame tweeted rumors about no less than four distinct Navi 21 chip versions:

• Navi21 XTX

• Navi21 XT

• Navi21 XL

• Navi21 XE

_rogame speculates that "Navi21 XE" will be the lowest-tier GPU, featuring a bus width reduced from 512 to 320 bits. This could account for a 10GB version of the sub-flagship card. Consequently, the 12GB, 384-bit video adapter might turn out to be a card equipped with the Navi21 XL GPU.

Honestly, though, a 10GB version of an AMD graphics card seems highly improbable. A 12GB model (Radeon RX 6800 XT?), however, is much more plausible.

Still, it's worth noting that AMD is unlikely to cut only the memory bus while leaving the GPU's compute units fully intact. Unsurprisingly, _rogame, the source of these rumors, also considered this possibility. He polled his followers on how a more affordable adapter's performance might be reduced. However, Twitter users were divided, with many voting that a cheaper card would see virtually no additional simplification of its compute units.

We, however, are less optimistic. It's highly probable that if rumors of a 12GB Radeon RX 6900 XT (or Radeon RX 6800 XT?) card prove true, it will lose not just bandwidth but also at least 10-20% of its compute units (stream processors and texture units; rasterization units are unlikely to be impacted).

Similar information, though largely unconfirmed, is already circulating online:

⤢ ВІДКРИТИ

According to this, a 12GB card (presumably the Radeon RX 6800 XT) would shed a substantial 896 stream processors, along with a significant number of texture units.

Table of rumored Radeon RX "Big Navi" 6900 XT specifications:

Approach all this information with extreme caution, as the aforementioned specs are merely rumors, with some even being pure speculation building on those rumors.

Source: WccfTech