Specifications for Radeon RX 6000 / GPU Navi 21 XT: up to 2.4 GHz


We have the parameters of a Navi 21 XT GPU that could power the AMD Radeon RX 6900 XT: chip consumption 255 W, clock speed up to 2400 MHz. But there should still be a Navi 21 XTX above it.

So it seems that after a small preview of the Rade 6000 RX 6000 last Thursday, this is perhaps the first leak of specifications. Information about the model, which is allegedly the middle of the Radeon RX 6000 graphics, based on the Navi 21 chip aka “Big Navi”, has leaked.

This leak comes from Patrick Schur from Twitter, from whom we already had some insider information about APU Cezanne and Van Gogh / Rembrandt. This time it is about GPU data “Navi 21 XT”.

According to VideoCardz, AMD will have three variants of this chip. The strongest and probably fully active is to be called Navi 21 XTX, but this one is said to be exclusive and the cards with it will be sold only by AMD itself (that is, it looks like Nvidia-like mores with the Titans). Maybe they could be called Radeon RX 6900 XTX, XT Special Edition or so on.

The second variant is the Navi 21 XT and this will already include non-reference cards from individual partner manufacturers. This might be labeled the Radeon RX 6900 XT, but we’re just guessing. However, there should still be a third variant of the Navi 21 XL from the same GPU, which will be weaker – the card could be sold as a Radeon RX 6900 (if you don’t need the RX 6800 right away). The Navi 21 XT variant will be somewhere in the middle.

Navi 21 XT: 2.4 GHz, Consumption 300 W +

According to Schur, the Navi 21 XT should have 16 GB of GDDR6 memory, so a full 256-bit bus. The frequency of the GPU (supposedly Game Clock, but maybe it will be more of a boost frequency?) Is supposed to be up to 2.4 GHz, which is pretty crazy. In fact, Navi 10 chips often ran at even higher beats than specifications listed as Boost Clock, but it’s not certain that this will be the case here.

VideoCardz states that according to its information, the reference cards are supposed to reach 2.3 GHz, but some samples run at those 2.4 GHz – but they should be non-reference OC cards. And this probably applies again to the Navi 21 XT. The weaker Navi 21 XL is said to have a boost clock around 2.2 GHz. The sources do not say what frequencies the Navi 21 XTX should have. Because this configuration will only be sold by AMD, the partner manufacturers have no information about it and therefore nothing has escaped, AMD keeps it a secret.

Schur also states the consumption for the Navi 21 XT. Its “TGP” is supposed to be 255 W. Attention, this is not the TDP of the whole card, but only the TDP of the chip itself, to which GDDR6 memories, power cascade, consumption of fans and LEDs will be added. The complete TDP card could be 300-320 W. Note: according to VideoCardz, the figure of 255 W could probably belong to a non-reference OC card, so it could be increased and the reference card could eat a little less. But we can’t know for sure now.

AMD Radeon RX 6000 graphics with Navi 21 GPU (Source: VideoCardz)

Memories the same on all models, the XT can have a trimmed chip

VideoCardz notes from Schur that both the Navi 21 XT and the weaker XL and the strongest Navi 21 XTX all have the same 256-bit memory bus and 16 GB of GDDDR6 memory. So they should not differ much in this. However, they will probably have a different chipped chip and cheaper versions will have fewer CUs / shaders. So far, however, it is a great mystery whether this means that the 80 CUs we have known about for quite some time will have a Navi 21 XT, and the XTX model has more (without revealing it yet).

Rather, it is probably likely that the Navi 21 XTX, as a full-fat firearm of this silicon, has 80 CU (5,120 shaders) and the Navi 21 XT could have less. For example 72 CU (4608 shaders), but who knows, maybe it could be 68 or 76 CU (4352, 4864 shaders).

Alleged photo of GPU Big Navi
Alleged photo of GPU Big Navi (Source: Coreteks)

You would probably all like to know which AMD model was presented at the Ryzen 5000 presentation on October 8, but no one outside the company has any idea. It could be the fastest XTX (if AMD wanted to make the best possible impression immediately), but also theoretically XT (if it wanted to keep a reserve tactically for now and then surprise by announcing an even better variant). You will probably have to wait here until October 28, when the company will reveal the cards directly.

Gallery: Preview of AMD Radeon RX 6000 graphics cards (October 8, 2020)

Source: VideoCardz, Patrick Schur

Specifications for Radeon RX 6900 XT (?): Navi 21 XT has power consumption over 300 W, 2.4 GHz clock

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