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Esteemed Contributor III

AMD Radeon RX 6000 Navi 21 XT, Navi 21 XL “Big Navi” GPU Clocks Speeds Reportedly Up To 2.4 & 2.2 GHz, Huge Jump From Base To Boost Clocks

For those interested on the next generation of AMD GPU cards: AMD Radeon RX 6000 Navi 21 XT & Navi 21 XL "Big Navi" GPU Clocks Speeds Reportedly Up To 2.4 & 2.2 G... 

Note the new GPU cards have a very high Wattage ratings which means many Users will probably need to upgrade the PSU in their computers to run the new GPU cards.

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In a series of tweets, veteran tech leaker, Rogame, has uncovered the clock speeds of AMD's Navi 21 "Big Navi" GPUs which go on to power the top of the line Radeon RX 6000 series graphics cards. As per Rog Game, the Navi 21 XT and Navi 21 XL will have clock speeds up to 2.4 GHz which is also something that was reported yesterday.

AMD Radeon RX 6000 Graphics Cards With Navi 21 "Big Navi" GPUs To Feature Up To 2.2-2.4 GHz Clock Speeds

The AMD Navi 21 GPU which is going to be the "Big Navi" chip will have several variants. We know from previous leaks that the Navi 21 SKU lineup includes the Navi 21 XTX, Navi 21 XT, Navi 21 XL & Navi 21 XLE. The graphics card that AMD teased at its Zen 3 announcement was most likely based on the Navi 21 XT die and will be referred to as the Radeon RX 6900 XT. Yesterday, it was reported that the Navi 21 XT GPU will feature insane clocks of 2.4 GHz and a TGP of 255W. Rogame gives us an even better insight on what to expect from Navi 21 SKUs in regards to their clock frequencies.

[Update Navi21]

Navi21 XL
> Base clock 1350MHz to 1400MHz
> Game clock 1800MHz to 1900MHz
> Boost clock 2100MHz (maybe 2200MHz)

Navi21 XT
> Base clock 1450MHz to 1500MHz
> Game clock 2000MHz to 2100MHz
> Boost clock 2200MHz to 2400MHz

1/2 https://t.co/ig6WIJmbgT

— _rogame (@_rogame) October 18, 2020

The leaker reports that both Navi 21 XT and Navi 21 XL "Big Navi" GPUs for Radeon RX 6000 series graphics cards will feature a huge variation between the base and boost clocks. We're looking at up to a +700 MHz difference between the base and boost frequencies. Following are the clock speeds as listed by Rogame:

AMD Radeon RX 6000 Series Navi 21 XT "Big Navi" GPU Clocks (via Rogame)

  • Base clock 1450MHz to 1500MHz
  • Game clock 2000MHz to 2100MHz
  • Boost clock 2200MHz to 2400MHz

AMD Radeon RX 6000 Series Navi 21 XL "Big Navi" GPU Clocks (via Rogame)

  • Base clock 1350MHz to 1400MHz
  • Game clock 1800MHz to 1900MHz
  • Boost clock 2100MHz (maybe 2200MHz)

According to the leaker, the Navi 21 XT/XL GPUs will feature even higher clock speeds in AIB made custom models. The first batch of GPUs will be sold as reference only variants but AMD's partners are definitely cooking their own custom designs that will feature even higher clock speeds.

Similar statements were provided by Videocardz whose sources at AIBs reveal that the Navi 21 XL will have peak clock speeds around 2.2 GHz, similar to what's stated by Rogame. It is likely that the red team will artificially lock the clock speeds but reference samples are said to feature around 2.3 GHz peak clocks with AIB models hitting the 2.4 GHz clocks out of the box.

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

  • Navi 21 XTX (0x731FSmiley Very Happy0)
  • Navi 21 XT (0x731FSmiley Very Happy1)
  • Navi 21 XL (0x731FSmiley Very Happy3)
  • Navi 21 XLE (0x731FSmiley Very HappyF)

The AMD Navi 21 XTX and XLE variants are currently unknown and the former is said to be an AMD exclusive variant. There are rumors that the Navi 21 XTX can feature a higher number of cores than the Navi 21 XT GPU which peaks out at 5120 stream processors or 80 CUs (Compute Units) but that remains to be seen. The XTX variant could be a special binned variant that AMD can market as the highest performing Big Navi Radeon RX 6000 series graphics card. Previously, the highest-end SKUs have received more premium designs such as AIO coolings and we can see a return of that on the XTX variant.

- Max. TGP of Navi 21 XT is 290 W.
- AIB partners are testing different TGP for their cards.
- The ~2.4 GHz was achieved with an AIB partner card. So assume that the card was slightly overclocked.

— Patrick Schur (@patrickschur_) October 18, 2020

Patrick Schur has also reported that while the 255W TGP is mostly close to the reference spec, the max TGP is suggested around 290W. AIB models will feature different TGP's based on their cooling and board designs. Patrick also reaffirms that the 2.4 GHz Game clock was achieved by an AIB card so it could've been slightly overclocked outside its factory overclocked specs.

As for the Navi 21 XT and XL graphics card, these cards are said to feature 16 GB and 12 GB GDDR6 memory capacities. The bus interface for the 16 GB variant is 256-bit as per the leaked PCB but can change in the final variant. There are also reports of Infinity Cache being one of the big features on Navi 21 GPUs, offering higher bandwidth figures to boost high-res gaming performance. These are the specifications that we know so far but expect more leaks to occur in the coming days prior to the unveiling itself.

AMD's RTG Flagship GPUs Comparison:

Graphics CardAMD Radeon R9 Fury XAMD Radeon RX Vega 64AMD Radeon VIIAMD Radeon RX 5700 XTAMD Radeon RX 6900 XT
GPU CodenameFiji XTVega 10 XTVega 20 XTNavi 10 XTNavi 21 XT?
GPU Process28nm14nm7nm7nm7nm+?
Transistors8.9 Billion12.5 Billion13.3 Billion10.3 BillionTBA
Die Size596mm2495mm2331mm2251mm2~500-540mm2
Compute Units6464604080?
Stream Processors40964096384025605120?
TMUs/ROPs256/64256/64240/64160/64TBA
Base Clock1050 MHz1247 MHz1400 MHz1605 MHzTBA
Boost Clock1050 MHz1546 MHz1750 MHz1905 MHz2.3-2.4 GHz?
Memory Size4 GB HBM18 GB HBM216 GB HBM28 GB GDDR616 GB GDDR6?
Memory Bus4096-bit2048-bit4096-bit256-bit256-bit?
Bandwidth512 GB/s484 GB/s1024 GB/s448 GB/s512 GB/s?
TDP275W295W295W225W255W?
Price$649$499$699$399 USTBA
Launch20152017201920192020

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.

How fast do you think AMD's Big Navi (RDNA 2) GPU Powered Radeon RX graphics cards will be?
14 Replies
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Esteemed Contributor III

Re: AMD Radeon RX 6000 Navi 21 XT, Navi 21 XL “Big Navi” GPU Clocks Speeds Reportedly Up To 2.4 & 2.2 GHz, Huge Jump From Base To Boost Clocks

I think it might be a good idea to put on the RX 6xxx Series GPU Retail box in bold letters indicating the minimum PSU required to run these cards. 

So Users will be aware if they have a powerful enough PSU for the new NAVI 21 GPU cards before purchasing and later on going to AMD Forums complaining the computer is all screwed up since install the new GPU cards. 

Good chance it will be Power or Driver related.

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Big Boss
Big Boss

Re: AMD Radeon RX 6000 Navi 21 XT, Navi 21 XL “Big Navi” GPU Clocks Speeds Reportedly Up To 2.4 & 2.2 GHz, Huge Jump From Base To Boost Clocks

I will second that. And none of the crap they did last time of having minimum and recommended specs. Just put the full recommended spec. When you put the so called minimum there are so many variables that make a power supply fall under its advertised spec and failing to deliver power needed by a GPU. 

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Big Boss
Big Boss

Re: AMD Radeon RX 6000 Navi 21 XT, Navi 21 XL “Big Navi” GPU Clocks Speeds Reportedly Up To 2.4 & 2.2 GHz, Huge Jump From Base To Boost Clocks

I have an HX1000i so I am not super worried about some power pig video card

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Esteemed Contributor III

Re: AMD Radeon RX 6000 Navi 21 XT, Navi 21 XL “Big Navi” GPU Clocks Speeds Reportedly Up To 2.4 & 2.2 GHz, Huge Jump From Base To Boost Clocks

Trouble is most Users are not aware whether their PSU is powerful enough or not.  All they see is that the new GPU cards will fit in the same PCIe slot as their old GPU card and will fit inside their computer case.

Some Users will find out their PSU doesn't supply 2 - 8 PIN PCIe Power Connectors and then go out and purchase adapters to connect one or both 8 Pin GPU Connectors from the PSU. Something the PSU might not be able to handle.

From what I have read, the NAVI21 will all have 2 - 8 Pin PCIe GPU Power connectors due to their high TGP of over 200 Watts. So if a User has a power hungry Ryzen CPU and and a Navi21 GPU card it is possible a 600 Watt PSU may not be powerful enough to run the computer under heavy stress, in my opinion.

Not every User has a 1000 Watt PSU or higher installed.

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Big Boss
Big Boss

Re: AMD Radeon RX 6000 Navi 21 XT, Navi 21 XL “Big Navi” GPU Clocks Speeds Reportedly Up To 2.4 & 2.2 GHz, Huge Jump From Base To Boost Clocks

I know I don't have a 1000 watt power supply. If AMD says minimum 650 watt that will be a travesty again. I can pretty much promise you with that verbiage the recommended is more like a 750. A lot of people will buy the card thinking their 650 is fine and be here in these forums wanting to know why their computer is hanging with their new graphics card. 

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Esteemed Contributor III

Re: AMD Radeon RX 6000 Navi 21 XT, Navi 21 XL “Big Navi” GPU Clocks Speeds Reportedly Up To 2.4 & 2.2 GHz, Huge Jump From Base To Boost Clocks

I don't know what AMD has as a minimum PSU Wattage. I picked 600 Watts because a Ryzen can easily use more the 200 -300 watts or more under stress and with a Navi21 GPU card could possible go over 400 watts under stress.

This website shows the various Ryzen 39xx processors and Intel processor Wattage under stock speeds:

and Overclocked:

Here

Here is 3D Guru showing the Wattage during gaming. The Radeon VII is closest to the new Navi 21 GPU cards:

The new Navi 21 GPU card MIGHT be much higher than the Radeon VII. 

Once they go to Retail stores and Tech sites have a chance to Review them they will find out how much Wattage or Power these new GPU cards will consume.

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Miniboss
Miniboss

Re: AMD Radeon RX 6000 Navi 21 XT, Navi 21 XL “Big Navi” GPU Clocks Speeds Reportedly Up To 2.4 & 2.2 GHz, Huge Jump From Base To Boost Clocks

Most of this information is speculative and wrong.

Now as it stands we don't actually which is "Big" Navi (54/60 CU) and which is "Bigger" Navi (72/80CU) BUT what I can say with absolute certainty is that what AMD previewed in regards to benchmark scores at the end of their Ryzen 5000 presentation as an appetiser for the Radeon Event next week., that was "Big" Navi... and specifically I'd wager it was their XT Version.

architectural improvements to performance from RDNA 2, which Microsoft says is 25 per cent to the better, teraflop to teraflop.

Navi 10 XT achieves ~39.9 FPS Avg. 4K Ultra in Gears of War 5 (DirectX 12) [Review Aggregate., but re-downloading now to run some benchmarks to validate]

[edit] After Validation (5 Run Avg. 2160p Ultra)., I'm getting 36.5 FPS Avg... if as in other games, I'm getting ~10% Less Performance than I should (be it from PCIe 3.0 x16 / Ryzen 1st Gen / 3.5GHz CPU Frequency / 6C-12T CPU) then this would actually mean that accounting for that., then this would put it ~39-41 FPS and inline with the Review Aggregate. 

This is assuming to be at the Boost Frequency [1905MHz] but we can use this to base what to expect from the Navi 20 XT (RX 6700 XT) Graphics Card.

i.e. we should expect to see 49.88 FPS [1905MHz]., and I actually think we'll see the Boost Frequency (slightly) but only to 2000 - 2050MHz... it will be such a small increase in performance. 

Still let's assume they're not, and this does make sense as we'll be talking about a Lower Power Draw, Lower Thermal Profile thus we'll be seeing these actually hold the Boost Frequency better.

From this though we can quite easily figure out where the 60CU and 80CU Cards should sit in terms of performance... first I'll use 1905MHz as a "Baseline" while also providing what the proposed (above) Frequencies should yield.

Navi 21 XT (60CU?) • [1905MHz] 73.32 FPS [2100MHz] 80.83 FPS

Navi 23 XT (80CU?) • [1905MHz] 95.77 FPS [2200MHz] 110.60 FPS

Notice something... yeah., the 60CU Variant at the same Boost Frequency as the RX 5700 XT is theoretically achieving EXACTLY what AMD is showcasing as the performance of the "Unnamed" Radeon 6000-Series GPU.

What's more is if we actually compare this performance to the RTX 3080., it's ONLY Borderlands 3 where it is achieving a "Win" with Gears 5 is ~10% Slower while CoD MW is ~15% Slower.

Why is this interesting? Well because Borderlands 3 at 4K HDR10 Badass on the RX 5700 XT will yield a 29.35 FPS Avg. (at least on my System)., this might be slightly below what it could potentially hit assuming what Colesdav was reporting was correct in comparison to Forza Horizon 4.

In any case we can still use this... again we want to add +25% IPC, +50% CORE, -2% Core Scaling

This yields 53.93 FPS., let's see what it would be with Higher Frequencies .. well now at 2100MHz we'd yield 59.45 FPS.

Of course I would note that when Benchmarking in Bad*** Graphics., unlike Ultra / High (typically I have it set to High Graphics 1440p for a smooth 60Hz as it never drops below at that) ... there are some BIG dips in 2 Sections of the Benchmark near the end.

First during the initial swing towards the Docks then just as it gets to the Docks before going under the Canopy to the Left... both of which drop the FPS down to 23-24 before slowly climbing back up to 28-31. 

This likely is having a big impact on the Avg. for me, and not sure if this is SRAM, VRAM or CPU related... on top of this the biggest impact to performance appears to be Screen-Space Reflections, as there is a clear drop in Framerate when there is a lot of Water on-screen; this could be something that RDNA2 offloads to the TPU, which does now have somewhat dedicated Hardware to accelerate such.

Still in either case., if we calculate where the 80CU should be., that's +25% IPC, +100% Core, -4% Core Scaling; then what we end up with is 70.44 FPS [1905MHz] and 81.35 FPS [2200MHz].

This is quite clearly well above when is being reported (61FPS). 

I still stand by my speculation that AMD was (and has) decided to keep Stock Frequencies the same as Navi 10., and the differences will literally be tweaks so that their pricing model means the Performance Per Currency remains relatively flat (and predictable).

I also think what they've showcased was sandbagging (to a degree)., by showcasing the RX 6800 (Navi 21?) as opposed to the bigger and faster RX 6900 (Navi 23?). 

Now I have made a post elsewhere, with my speculation about the potential SKU along with pricing. 

And if the Clocks do remain roughly the same (which I think they will, so AMD doesn't have to really create a High-Performance Cooling Solution) then we can expect to see:

RX 6700 XT use 180w (peak) 165w (avg.) 500w PSU Recommended 

RX 6800 XT use 270w (peak) 250w (avg.) 600w PSU Recommended

RX 6900 XT use 360w (peak) 320w (avg.) 750w PSU Recommended

We will of course find out next Wednesday., but as it stands... yeah that's where I think they'll be.

What's more is Ro Game also doesn't believe that there will be any Mainstream RDNA2 GPUs., instead he is standing by the idea of an RDNA1 Refresh.

I think that's just what the AIB Partners have been told so-far, but that isn't inline with what AMD stated in regards to conditions for including DXR Support in Radeon GPUs.

They said and I quote David W, Senior VP of Radeon Technologies Group

Utilization of ray tracing games will not proceed unless we can offer ray tracing in all product ranges from low end to high end.

They have actually reiterated this several times since this initial quote in 2018.

I'm not saying that we WILL be seeing the RX 6500 / 6600 as part of the Radeon RX 6000-Series Launch., but I don't believe for a second that AMD will rebrand and rerelease the RX 5000-Series under the RX 6000-Series branding.

As it will not only omit Hardware Ray Tracing Support (against their statement of brining Ray Tracing to both Low and High End Hardware) but they'll also be creating a greater performance and efficiency deficit between their Mainstream and Enthusiast Product Sectors.

Then you add in to the mix that the RX 5000-Series "Low End" currently all use the same Embedded Semi-Custom GPU that was designed for the Mobile Market and was never intended for the Desktop Market; as opposed to more cost efficient dedicated GPU Designs.

Why would AMD deliberately keep their profit margins low and their prices anti-consumer high for said market sector?

That makes ZERO business sense.

Instead what I think will happen is that we will get a Staggered Release.

How they will stagger them exactly I'm not sure., but I think High End > Mainstream > Budget over the next 6 months.

[edit] It's a little amusing to me the Senior VP of Technology at RTG' name is considered "Offensive Language", so don't mind the edits to get around that.

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Big Boss
Big Boss

Re: AMD Radeon RX 6000 Navi 21 XT, Navi 21 XL “Big Navi” GPU Clocks Speeds Reportedly Up To 2.4 & 2.2 GHz, Huge Jump From Base To Boost Clocks

I don't know what they are picking. I am only pointing out that for a couple generations now they have been listing minimum and recommended. In a lot of cases those minimums they list will get you into a lot of trouble stability wise. 

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Big Boss
Big Boss

Re: AMD Radeon RX 6000 Navi 21 XT, Navi 21 XL “Big Navi” GPU Clocks Speeds Reportedly Up To 2.4 & 2.2 GHz, Huge Jump From Base To Boost Clocks

elstaci wrote:

Trouble is most Users are not aware whether their PSU is powerful enough or not.  All they see is that the new GPU cards will fit in the same PCIe slot as their old GPU card and will fit inside their computer case.

 

Some Users will find out their PSU doesn't supply 2 - 8 PIN PCIe Power Connectors and then go out and purchase adapters to connect one or both 8 Pin GPU Connectors from the PSU. Something the PSU might not be able to handle.

 

From what I have read, the NAVI21 will all have 2 - 8 Pin PCIe GPU Power connectors due to their high TGP of over 200 Watts. So if a User has a power hungry Ryzen CPU and and a Navi21 GPU card it is possible a 600 Watt PSU may not be powerful enough to run the computer under heavy stress, in my opinion.

 

Not every User has a 1000 Watt PSU or higher installed.

I have ranted for years over inadequate power supplies.

Recent cards in my studio with three 8-pin cables should wake everyone up that power demands can be brutal.

  • R9 Fury needs 3 cables
  • HD 7990 also wants 3 cables
  • RTX 3080 wants 3 as well

This what I rant over PSU capacity, RGB simply adds more demands on 5V which is not in infinite supply.

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