AMD Radeon RX 6600 non-XT performance simulation puts its very close to GeForce RTX 3060

AMD Radeon Pro W6600 in disguise as RX 6600 non-XT

Igor’sLAB has an interesting performance simulation of Radeon RX 6600 non-XT, a graphics card that has not yet been released but has been seen in the leaks.

The AMD Radeon RX 6600 non-XT had already appeared in the leaks numerous times. The most recent rumor was that the SKU is set to launch in September, while PowerColor had even begun listing this model specifically on their website. Despite numerous appearances, the SKU has not been released yet, nor has the Radeon RX 6700 non-XT.

While the release date is unknown, the specifications of this SKU are pretty much known at this point. The SKU would rely on Navi 23 XL GPU which is to offer 1792 Stream Processors, exactly the same number as Radeon Pro W6600. The size of the memory isn’t known, but one should expect either 8GB or 4GB. What is worth noting is that so far AMD has not released a Navi 2X graphics card with less than 8GB of memory.

Assuming that RX 6600 non-XT would also feature 8GB memory, it is actually possible to simulate the graphics card performance using existing solutions offering the exact same GPU, such as the already mentioned Radeon Pro W6600. Igor Wallosek from Igor’sLAB decided to modify and overclock this GPU to simulate the performance of the supposed RX 6600 non-XT. While this solution is far from ideal, it is definitely as close as we can get to RX 6600 non-XT performance figures at this point. It is definitely more accurate than any mathematical approach, after all, it is based on actual silicon. Things that cannot be simulated are clocks behavior and TDP range. Igor assumed that the card would have 130W, which is reasonable considering how much power the XT variant requires (160W).

Radeon Pro W6600 simulated as RX 6600 non-XT, Source: Igor’sLAB

Eventually, he came up with a GPU that offers a 2331 MHz base clock, 2580 MHz boost clock, and 16 Gbps memory (+2 Gbps compared to the Pro variant). According to the test results, the PRO W6600 simulated as RX 6600 non-XT would consume around 123W in gaming, nearly 42W less than GeForce RTX 3060 from NVIDIA.

Radeon Pro W6600 simulated as RX 6600 non-XT, Source: Igor’sLAB

At the same time, the card would offer just 4% less performance than RTX 3060 at 1920x1080p resolution, which is the only resolution this graphics card would offer competitive performance. With limited PCI Express 4.0 link to 8 lanes and reduced core count to 1792, the RX 6600 non-XT would probably have trouble competing at 1440p resolution and above. Although the RX 6600XT had a relatively good performance at those resolutions (check relative performance charts at TechPowerUP).

Radeon Pro W6600 simulated as RX 6600 non-XT, Source: Igor’sLAB

The AMD Radeon RX 6600 non-XT would probably launch at 300-330 US dollars, a price currently reserved for second-hand GPUs from the last-gen series. AMD might be waiting for GeForce RTX 3050 desktop series deployment though, which would be the direct competition for this card. At this point in time though, NVIDIA has no plans to launch this SKU in the next few weeks, at least not from what we have heard recently.

AMD Radeon RX 6000 Series
VideoCardz	RX 6900 XT LC	RX 6800 XT	RX 6700 XT	RX 6600 XT	RX 6600
Picture
GPU	Navi 21 XTXH	Navi 21 XT	Navi 22 XT	Navi 23 XT	Navi 23 XL
Cores	5120	3840	2560	2048	1792
Infinity Cache	128 MB	128 MB	96 MB	32 MB	32 MB
Game Clock	2250 MHz	2015 MHz	2424 MHz	2359 MHz	TBC
Boost Clock	2435 MHz	2105 MHz	2581 MHz	2589 MHz	TBC
Memory Clock	18 Gbps	16 Gbps	16 Gbps	16 Gbps	16 Gbps
Memory	16 GB GDDR6	16 GB GDDR6	12 GB GDDR6	8 GB GDDR6	8 GB GDDR6
Memory Bus	256-bit	256-bit	192-bit	128-bit	128-bit
Bandwidth	576 GB/s	512 GB/s	384 GB/s	256 GB/s	256 GB/s
TBP	330W	250W	230W	160W	~130W
MSRP	OEM	579 USD	479 USD	379 USD	299-329 USD
Launch Date	June 2021	November 2020	March 2021	August 2021	September 2021?

Source: Igor’sLAB