• Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

Reference Liquid-Cooled Radeon RX 6900 XT Listed, Possibly the RX 6900 XTX, with Faster Memory

btarunr

Editor & Senior Moderator
Staff member
Joined
Oct 9, 2007
Messages
41,252 (8.25/day)
Location
Hyderabad, India
Processor AMD Ryzen 7 2700X
Motherboard ASUS ROG Strix B450-E Gaming
Cooling AMD Wraith Prism
Memory 2x 16GB Corsair Vengeance LPX DDR4-3000
Video Card(s) Palit GeForce RTX 2080 SUPER GameRock
Storage Western Digital Black NVMe 512GB
Display(s) BenQ 1440p 60 Hz 27-inch
Case Corsair Carbide 100R
Audio Device(s) Creative Sound Blaster Recon3D PCIe
Power Supply Cooler Master MWE Gold 650W
Mouse ASUS ROG Strix Impact
Keyboard Microsoft Sidewinder X4
Software Windows 10 Pro
To preempt NVIDIA's GeForce RTX 3080 Ti launch, AMD had worked with its partners to release a refreshed Radeon RX 6900 XT based on a swanky new ASIC internally dubbed "XTXH." This is essentially the highest bin of the "Navi 21" silicon that allows 10% higher clock speeds over the standard RX 6900 XT. Our testing of one such card, the ASRock RX 6900 XT OC Formula, showed that the XTXH is able to trade blows with the RTX 3090, making it competitive with the RTX 3080 Ti. Interestingly, there seemed to lack a reference design "made by AMD" card based on this silicon. Turns out, AMD had other plans. This card was earlier believed to be the "Radeon RX 6900 XTX," when it was first leaked in April, but turns out, that AMD is allowing partners to simply call this the RX 6900 XT.

The reference design card uses a liquid-cooled design. The card itself is two slots thick, and about the size of the reference Radeon RX 6800, but two coolant tubes emerge from its top, which head to a 120 mm x 120 mm radiator. This is a purely liquid-cooled card, with no secondary air-based cooling, like the ASUS ROG Strix LC RX 6900 XT. The only sources of noise are the AIO pump-block, and the single included 120 mm fan. Besides 10% higher GPU clocks, the reference design card has an ace in the hole that custom-design XTXH cards lack—faster memory.



A listing of a Sapphire-branded reference liquid-cooled card on Brazilian online store Kabum claims that the card comes with a memory clock speed of 18 Gbps GDDR6. Samsung has been mass-producing 18 Gbps-rated GDDR6 memory chips (which are not GDDR6X), since 2018, so it's likely that AMD secured itself some volume to send to its reference-design OEM, PC Partner. At 18 Gbps, the memory bandwidth shoots up to 576 GB/s, from 512 GB/s on the RX 6900 XT.

The card's engine boost frequency is listed as 2435 MHz, which is in the league of other XTXH cards, so it's not like the faster memory is compensating for lower engine clocks. What's interesting, though is that the pictures reveal that the card makes do with just two 8-pin PCIe power connectors—a configuration rated for 375 W—while every custom-design XTXH card uses a triple 8-pin configuration rated for 525 W. Kabum claims the card will ship from 30th June, 2021.

View at TechPowerUp Main Site
 
Joined
Jun 24, 2020
Messages
16 (0.04/day)
Wow, this store is called Kabum! My (Kabum)account is bugged for unknown reasons. Their support sucks!

Edit: price is around of US$4000(green).
pre-venda = pre-order
lista de desejos = wishlist
shipping after June 26
 
Last edited:
Joined
Oct 22, 2014
Messages
12,217 (5.03/day)
Location
Sunshine Coast
System Name Black Box
Processor Intel i5-9600KF
Motherboard NZXT N7 Z370 Black
Cooling Cooler Master 240 RGB AIO / Stock
Memory Thermaltake Toughram 16GB 4400MHz DDR4 or Gigabyte 16GB 3600MHz DDR4 or Adata 8GB 2133Mhz DDR4
Video Card(s) Asus Dual 1060 6GB
Storage Kingston A2000 512Gb NVME
Display(s) AOC 24" Freesync 1m.s. 75Hz
Case Corsair 450D High Air Flow.
Audio Device(s) No need.
Power Supply FSP Aurum 650W
Mouse Yes
Keyboard Of course
Software W10 Pro 64 bit
375W to reduce heat, as without a fan on the PCB these will cook themselves. (IMO)
 
Joined
Nov 23, 2020
Messages
249 (1.21/day)
Location
Not Chicago, Illinois
System Name Desktop-TJ84TBK
Processor Ryzen 5 3600
Motherboard Asus ROG Strix B350-F Gaming
Cooling ARCTIC Liquid Freezer II 120mm, Noctua NF-F12
Memory B-Die 2x8GB 3200 CL14, Vengeance LPX 2x8GB 3200 CL16, OC'd to 3333 MT/s C16-16-16-32 tRC 48
Video Card(s) PNY GTX 692, EVGA GTX 650 Ti BOOST 2GB Superclocked Edition
Storage Crucial M4 128GB, Crucial MX500 500GB,WD 250GB, WD Black 2TB, WD Caviar Green 3TB, Intel Optane 16GB
Display(s) Samsung S22B350 1080p77, ASUS 1080p74
Case Rosewill CRUISER Black Gaming
Audio Device(s) SupremeFX S1220A
Power Supply Seasonic FOCUS GM-750
Mouse Kensington K72369
Keyboard Microsoft Comfort Curve 2000
Software Windows 10 Home 64-bit
Benchmark Scores are good
Ooh, tempting.
Given that:
- macOS 11.4 Big Sur now supports the 6900 XT
- It looks short enough to fit in my case (I have a ~280mm limit)
- It has a 120mm radiator, though perhaps this can be switched to 140mm? 140 would be preferable as it has larger surface area.
 
Joined
Jan 31, 2019
Messages
336 (0.39/day)
Is there a reason why RDNA2 memory speed is limited to 2150MT/s.
 
Joined
Mar 18, 2008
Messages
5,612 (1.16/day)
System Name Virtual Reality / Bioinformatics
Processor Undead CPU
Motherboard Undead TUF X99
Cooling Noctua NH-D15
Memory GSkill 128GB DDR4-3000
Video Card(s) EVGA RTX 3090 FTW3 Ultra
Storage Samsung 960 Pro 1TB + 860 EVO 2TB + WD Black 5TB
Display(s) 32'' 4K Dell
Case Fractal Design R5
Audio Device(s) BOSE 2.0
Power Supply Seasonic 850watt
Mouse Logitech Master MX
Keyboard Corsair K70 Cherry MX Blue
VR HMD HTC Vive + Oculus Quest 2
Software Windows 10 P
I am having major flash backs to my previous FuryX.

Cool and all, I hope they gave it 5yrs warranty on those AIO equipped GPUs.
 
Joined
Sep 25, 2019
Messages
66 (0.10/day)
Processor AMD Threadripper 2950X
Motherboard ASUS ROG Zenith Extreme
Cooling Custom hard-line water HeatKiller Pro CPU+VRM, Dual Radiator, EK Res'/fittings
Memory 64GB Corsair Dominator RGB
Video Card(s) Liquid Devil 6900XT
Storage Samsung 512GB Pro M.2. Intel 1.2TB PCI NVMe, 3 X 512GB SSD
Display(s) ASUS ROG 34" Curved UW 3440x1440 100Hz
Case Thermaltake View 71T (10 Fans)
Power Supply Corsair HX1000i
Mouse Logitech G502
Keyboard ASUS ROG
Software Win 10 PRO x64
Benchmark Scores Cinebench R20: 7984
So, if my normal 6900 XT is under-volted and running at 2441Mhz in Control (the game), 'that mean it's likely using an XTXH die?
 
Joined
Feb 11, 2009
Messages
3,409 (0.76/day)
System Name Cyberline
Processor Intel Core i7 2600k
Motherboard Asus P8P67 LE Rev 3.0
Cooling Tuniq Tower 120
Memory Corsair (4x2) 8gb 1600mhz
Video Card(s) AMD RX480
Storage Samsung 750 Evo 250gb SSD + WD 1tb x 2 + WD 2tb
Display(s) Philips 32inch LPF5605H (television)
Case antec 600
Audio Device(s) Focusrite 2i4 (USB)
Power Supply Seasonic 620watt 80+ Platinum
Mouse Elecom EX-G
Keyboard Rapoo V700
Software Windows 10 Pro 64bit
Is there a reason why RDNA2 memory speed is limited to 2150MT/s.
This, never understand artificial oc limits, it's scummy and anti consumer.

The product does looks sexy but it will be as pricey as unavailable.

It's funny to.me that amd releases high end competitive gpus right when affordable gpus are wanted.
They could have potentially gotten their cards in the hands of gamers, giving amd some.mindshare in that space while nvidia would sell to miners
 
Joined
Jan 6, 2014
Messages
437 (0.16/day)
Location
Germany
System Name Main Machine
Processor Ryzen 9 5900X
Motherboard Asus ROG Crosshair VIII Hero (WI-FI)
Cooling Water cooling, EK-DDC 3.2 PWM, 1x360mm+1x240mm+1x120mm EK Rads, CPU TechN Ryzen 5000 waterblock
Memory 16GB G.Skill Trident Z Neo DDR4-3600 CL14
Video Card(s) PowerColor 6900XT Liquid Devil Ultimate
Storage 2xSamsung SSD 970 EVO NVMe 1TB, 1x Samsung SSD 840 EVO 1TB, 4x3TB Seagate
Display(s) ASUS ROG Strix XG27WQ 27inch 165Hz FreeSync Premium Pro
Case Cooler Master COSMOS C700P
Audio Device(s) Turtle Beach Elite Pro Tournament + Elite Pro TAC
Power Supply Corsair Professional Series HX1200i 1200W Platinum
Mouse Logitech G903 LIGHTSPEED Wireless
Keyboard ROCCAT Ryos MK Pro
Software Win 10 Pro
Like the reference 6900XT they made this one also only with 2xPCIe power connector so limited to 375W. :oops:
It would be interesting to see how high this one clocks compared to other XTXH models.

As I own 6900XTU Liquid Devil Ultimate, I know that XTXH cards like more power and good cooling to OC higher.
So not sure how high these can clock with only small radiator to cool it and with 375W power limit.
My XTXH is set at 415W Core Power and 400A TDC and runs 2750MHz@1175mV stable. With lower power target, this frequency was not stable in 3DMARK.
In games like Cyberpunk though Core power draw is in range of 330-350W at this OC.
My card has EK block factory fitted but hotspot temperature were still hitting 92°C even with my custom loop with 3 rads that I have for cooling it together with 5900X.
I changed from standard paste to Liquid Metal and now hotspot temperatures remain below 78°C.
The VRM temperatures at 415W Core stress test remains in range of 55°C. The cold plate on EK block covers these as well.

The 18 Gbps is really interesting. If that is true, then this will mean memory running at 2250MHz. :D
That is the max value that can be set under Radeon software for the XTXH cards.
Usually on many 6800XT/6900XT cards the Time Spy score actual gets worst if memory is clocked higher than 2120MHz which is the same case on my XTXH card. So setting it to 2250MHz does not make sense on my card as performance is degraded.

It would be interesting to look into the Bios what setting AMD is using for this reference card to run memory that high without actually loosing performance.
Hopefully somebody who buys this card uploads his Bios to TPU database. :D
 
Last edited:
Joined
Aug 22, 2016
Messages
125 (0.07/day)
So, if my normal 6900 XT is under-volted and running at 2441Mhz in Control (the game), 'that mean it's likely using an XTXH die?
No its a different die and sold only on selected cards. Its not random, they can OC core past 3Ghz given the new clockgen and memory past 2150. And many people tried to bios flash from 6900xt to 6900xtx and bricked the card, hard to flash back the previous bios
 
Joined
Jan 4, 2013
Messages
615 (0.20/day)
Location
Denmark
System Name R9 5950x/Skylake 6400
Processor R9 5950x/i5 6400
Motherboard Gigabyte Master X570/Asus Z170 Pro Gaming
Cooling Arctic Liquid Freezer II 360/Stock
Memory 4xGB Patriot PVS416G4440 CL14/G.S Ripjaws 32 GB F4-3200C16D-32GV
Video Card(s) 6900XT/R7
Storage WD SN850 2TB, Aorus 2TB Corsair MP600 / 960 Evo 1TB
Display(s) 3x LG 27gl850
Case Custom builds
Audio Device(s) -
Power Supply Silverstone 1000watt modular Gold/1000Watt Antec
Software win10pro / Win10 Home / win7 / wista 64 bit and XPpro
OMG I slept for a year and its april 1. again...
 
Joined
Mar 28, 2020
Messages
807 (1.81/day)
I don't see the need for this card to be honest. If AMD launched the XTX version just to compete with RTX 3080 TI, the upgrade is not even in the same league. On the RTX 3080 Ti, there are tangible hardware improvements, while the XTX comes with slightly faster memory and clock speed, which I don't think is going to make a significant difference in performance. AMD have proven that RDNA2 is highly competitive at the high end, and I think that's all they need to do, while focusing on future products.
 
Joined
May 3, 2018
Messages
384 (0.34/day)
Oh boy can't wait to see if this is the first $5K non-existent gaming card in Australia. theBradRad will buy one and still play his games at a pathetic 1080p. He already has 3090 and won't do 1440p or let alone 4K.
 

64K

Joined
Mar 13, 2014
Messages
4,903 (1.85/day)
Processor i7 7700k
Motherboard MSI Z270 SLI Plus
Cooling CM Hyper 212 EVO
Memory 2 x 8 GB Corsair Vengeance
Video Card(s) MSI RTX 2070 Super
Storage Samsung 850 EVO 250 GB and WD Black 4TB
Display(s) Dell 27 inch 1440p 144 Hz
Case Corsair Obsidian 750D Airflow Edition
Audio Device(s) Onboard
Power Supply EVGA SuperNova 850 W Gold
Mouse Logitech G502
Keyboard Logitech G105
Software Windows 10
Oh boy can't wait to see if this is the first $5K non-existent gaming card in Australia. theBradRad will buy one and still play his games at a pathetic 1080p. He already has 3090 and won't do 1440p or let alone 4K.

That's pretty wild. The high end cards are good for at least 1440p unless that guy is just trying to get extremely high frame rates by using 1080p.
 
Top