[Hardware] AMD Navi 21 XT “Big Navi” GPU For Radeon RX 6900 XT Graphics Card Reportedly Features Insane 2.4 GHz Clocks, 16 GB GDDR6 VRAM & 255W TGP

[Hossam Taibi]

Specifications of the AMD Navi 21 XT "Big Navi" GPU for the Radeon RX 6900 XT graphics card have been reported by Patrick Schur who has been very credible regarding his information. According to the reported specs, the AMD Radeon RX 6900 XT seems to be a beast of a graphics card with insane clocks.

AMD Radeon RX 6900 XT With Navi 21 XT "Big Navi" GPU To Feature Insane 2.4 GHz Game Clock, 16 GB GDDR6 VRAM & 255W TGP

Patrick states in his tweet that the AMD Navi 21 XT GPU which is allegedly the "Big Navi" GPU that all enthusiast gamers have been waiting for will be an insane chip. As per previous reports, the 21 XT GPU will be featured on the Radeon RX 6900 XT graphics card but there are also reports that a faster XTX variant exists which would be even faster.

ClockTuner For AMD Ryzen “Zen 2” Desktop CPUs Gets V1.1 Update – Enhanced Engine With New Features, Fixes & More

 

The Navi 21 XT GPU will reportedly be a powerhouse of a chip with a game clock of around 2.4 GHz which are the highest clock speeds we will get to see on a consumer desktop-grade graphics card. This also suggests that we can expect even higher boost frequencies considering the game & boost clocks are separate, as the game clock is the average clock frequency that the GPU can maintain in games while the boost clock is the peak frequency that the GPU can hit.

The GPU is also said to feature a TGP (Total Graphics Power) of 255W. This doesn't mean the whole board power but rather the GPU itself. The GeForce RTX 3080 for comparison has a TDP of 320W & the GeForce RTX 3070 has a TDP of 220W.

AMD Ryzen 9 5950X, Ryzen 9 5900X, Ryzen 7 5800X “Zen 3” CPUs Benchmarked, Much Faster Than Their Ryzen 3000 Predecessors

The graphics card based on the Navi 21 XT GPU, which is reportedly the Radeon RX 6900 XT, is said to feature 16 GB of GDDR6 memory which is also what we've seen in various previous leaks. As for comparative measurements, the performance looks to be really close to the NVIDIA GeForce RTX 3080 graphics card which is very impressive for AMD to hit, and if they can price the Big Navi graphics card right at around $499-$599 US, then they will have a killer 4K solution in their hands.

Rogame already pointed out at least four SKUs for the Navi 21 (RDNA 2) GPU but we did not know anything else aside from the PCI IDs. There's active speculation going on right now regarding exact specifications and configurations of each SKU in terms of core counts, texture mapping units, and ROPs since we now know that the GPU consists of 5120 stream processors packed within 80 CUs.

 

As per Rogame, the Navi 21 GPU currently has the following SKUs:

• Navi 21 XTX (0x731F:D0)
• Navi 21 XT (0x731F:D1)
• Navi 21 XL (0x731F:D3)
• Navi 21 XLE (0x731F:DF)

AMD's RTG Flagship GPUs Comparison:

Graphics Card	AMD Radeon R9 Fury X	AMD Radeon RX Vega 64	AMD Radeon VII	AMD Radeon RX 5700 XT	AMD Radeon RX 6900 XT
GPU Codename	Fiji XT	Vega 10 XT	Vega 20 XT	Navi 10 XT	Navi 21 XT?
GPU Process	28nm	14nm	7nm	7nm	7nm+?
Transistors	8.9 Billion	12.5 Billion	13.3 Billion	10.3 Billion	TBA
Die Size	596mm2	495mm2	331mm2	251mm2	~500-540mm2
Compute Units	64	64	60	40	80?
Stream Processors	4096	4096	3840	2560	5120?
TMUs/ROPs	256/64	256/64	240/64	160/64	TBA
Base Clock	1050 MHz	1247 MHz	1400 MHz	1605 MHz	TBA
Boost Clock	1050 MHz	1546 MHz	1750 MHz	1905 MHz	TBA
Memory Size	4 GB HBM1	8 GB HBM2	16 GB HBM2	8 GB GDDR6	16 GB GDDR6?
Memory Bus	4096-bit	2048-bit	4096-bit	256-bit	256-bit?
Bandwidth	512 GB/s	484 GB/s	1024 GB/s	448 GB/s	512 GB/s?
TDP	275W	295W	295W	225W	255W?
Price	$649	$499	$699	$399 US	TBA
Launch	2015	2017	2019	2019	2020

AMD Radeon RX 6900 Series With Triple-Slot Cooling Solution:

As for the designs themselves, the Radeon RX 6000 flagship cooling design looks amazing with the red and black design. The card features a triple axial-tech fan setup on the shroud and has a large aluminum heatsink that runs beneath it. The card has a LED-lit Radeon logo on the side and there is a large cut out on the side for the fans to vent out hot air. This design is very reminiscent of the NVIDIA GeForce RTX 20 series Founders Edition cooler. The card will feature dual 8-pin power and display ports would include a USB Type-C (VirtualLink), 1 HDMI, and 2 DisplayPort connectors.

The card also features a fancy backplate along with a retention bracket to hold the cooler in place. The Radeon RX "Big Navi" GPU looks like it will come in the standard 2-slot reference design which is the same as NVIDIA's flagship RTX 3080 but not as huge as the triple-slot GeForce RTX 3090.

AMD will officially be unveiling its Radeon RX 6000 series graphics card family on October 28th. The second half of 2020 would definitely be interesting times for all the hardware enthusiasts and mainstream PC gamers who are looking forward to upgrading their PCs with the best hardware.