AMD's Liquid-Cooled Radeon RX 6900 XT

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https://www.tomshardware.com/news/amd-liquid-cooled-radeon-rx-6900-xt-high-clocks

AMD's liquid-cooled Radeon RX 6900 XT appears to be making its way to the retail market. VideoCardz has spotted a Sapphire listing over at a Kabum, a Brazilian retailer.

Speculation around the graphics card world is that the Radeon RX 6900 XT LC could very well be the incarnation of the rumored Radeon RX 6900 XTX. The latter was expected utilize the Navi 21 XTXH silicon, which allegedly brings the highest clock rates out of AMD's RDNA 2 army. Although we've already seen the graphics card in the wild, AMD hasn't formally confirmed the existence of the Radeon RX 6900 XT LC.

The Sapphire Radeon RX 6900 XT LC, which should employ the Navi 21 XTXH die, comes with 80 Compute Units (CUs) for a total of 5,120 Stream Processors (SPs). Along with those 5,120 SPs, you'll also find 80 ray accelerators for ray tracing workloads. The Radeon RX 6900 XT LC arrives with a 2,250 MHz game clock and a boost clock up to 2,435 MHz. The vanilla Radeon RX 6900 XT has a 2,015 MHz game clock and 2,250 MHz boost clock. Therefore, Sapphire's rendition is offering up to 11.7% and 8.2% higher game and boost clocks, respectively.

Besides the uplift in clock speeds, Kabum's specification table also shows an increase in memory speed for the Radeon RX 6900 XT LC. Apparently, the liquid-cooled version sports 18 Gbps GDDR6 memory chips as opposed to the 16 Gbps ones on the Radeon RX 6900 XT. It may be a human error, but it's certainly feasible, considering that Samsung produces 18 Gbps GDDR6 memory chips. If accurate, the extra frequency on the memory chips bumps the Radeon RX 6900 XT LC's maximum theoretical memory bandwidth up to 576 GBps, a 12.5% improvement over the regular version.

AMD Radeon RX 6900 XT LC Specifications​

	Radeon RX 6900 XT LC*	Radeon RX 6900 XT
Architecture (GPU)	RDNA 2 (Navi 21)	RDNA 2 (Navi 21)
CUDA Cores / SP	5,120	5,120
RT Cores	80	80
Ray Accelerators	80	80
Texture Units	320	320
Base Clock Rate	?	1,825 MHz
Game Clock Rates	2,250 MHz	2,015 MHz
Boost Clock Rate	2,435 MHz	2,250 MHz
Memory Capacity	16GB GDDR6	16GB GDDR6
Memory Speed	18 Gbps	16 Gbps
Memory Bus	256-bit	256-bit
Memory Bandwidth	576 Gbps	512 GBps
ROPs	128	128
L2 Cache	4MB	4MB
L3 Cache	128MB	128MB
TDP	?	300W
Transistor Count	26.8 billion	26.8 billion
Die Size	536 mm²	536 mm²
MSRP	?	$999

*Specifications are unconfirmed.​

AMD's Liquid-Cooled Radeon RX 6900 XT Arrives Flexing High Clocks

Big Navi goes swimming

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[silversurfer]

AMD Launches Radeon RX 6900 XT Liquid Cooled​

AMD on Wednesday unveiled a version of its flagship Radeon RX 6900 XT graphics card equipped with a closed-loop liquid cooling system (LCS). The new board boasts higher GPU and memory frequencies compared to AMD's reference air-cooled card, which is already among the best graphics cards, but it will (at least initially) be available exclusively to system integrators.

AMD's Radeon RX 6900 XT Liquid Cooled carries the company's Navi 21 GPU with 5120 stream processors that is clocked at up to 2250 MHz (game clock) and is accompanied with 16GB of 18Gbps GDDR6 memory. There are some Radeon RX 6900 XT graphics cards from manufacturers that have a higher GPU clock, but AMD's RX 6900 XT Liquid Cooled model is the only one to feature 18Gbps DRAM.

AMD Launches Radeon RX 6900 XT Liquid Cooled

AMD unveils OEM-only Radeon RX 6900 XT with LCS.

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