AMD Navi 33 “RDNA 3” GPUs Allegedly Featured Within Mid-Range Radeon RX 7600 XT Graphics Card Around $400 US, Faster Than RX 6900 XT

AMD's mid-range RDNA 3 graphics cards such as the Radeon RX 7600 XT are apparently going to utilize the Navi 33 GPU as tweeted by @Kepler_L2.

AMD Radeon RX 7600 XT Rumored To Utilize RDNA 3 "Navi 33" GPU, Aiming The $400 US Segment With Faster Than 6900 XT Performance

The AMD RDNA 3 "Navi 33" GPU was previously rumored to be utilized in the Radeon RX 7700 series lineup but a new rumor by @Kepler_L2 seems to suggest that it will instead be used in the Radeon RX 7600 series which is more of a mid-range lineup. The current Navi 23 cards are also featured in the Radeon RX 6600 series lineup so it makes sense but that would also mean a huge jump for the entire segment in general.

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N33 will be used in the 7600XT, not 7700XT.

— Kepler (@Kepler_L2) July 14, 2022

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We will see 7600XT at $400 or less and 4070 at $500 or less. It's fine🙂

— Kepler (@Kepler_L2) July 15, 2022

The RDNA 3 architecture-based Navi 33 GPU is considered a mid-range chip and is an optimization of the Navi 21 GPU on the newer RDNA 3 architecture. It is expected to be based on a TSMC 6nm monolithic design and should measure between 360-460mm2. That's an 11 to 30 percent reduction in die area compared to the Navi 21 GPU which is powering the high-end Radeon RX 6000 lineup and features a die size of 520mm2. Key features of the Navi 33 GPU are going to be:

• TSMC 6nm process node (Monolithic GPU design)
• RDNA 3 graphics core (Increased clocks/efficiency)
• 8 GB GDDR6 Memory Optimized Across a 128-bit bus
• Faster GDDR6 Memory Speeds
• Rasterization Performance Equal or Greater Than RX 6900 XT
• Ray tracing Performance Greater Than RX 6900 XT

AMD RDNA 3 Navi 33 GPUs For Radeon RX 7600 Series

The AMD Navi 33 GPU will start the monolithic segment within the RDNA 3 family. The GPU will feature a single die. The die is very similar to the flagship Navi 21 GPU and is expected to utilize a 6nm process node for fabrication.

AMD Navi 33 GPU Architectural Design 'Rumored'

The Navi 33 GCD is expected to feature 2 Shader Engines and each Shader Engine has 2 Shader Arrays (2 per SE / 4 in total). Each Shader Array was previously expected to be composed of 8 WGPs (8 per SE / 16 total) and each WGP should feature 8 SIMD32 units with 32 ALUs (64 SIMD32 per SA / 128 per SE). These SIMD32 units combine to make up 4096 cores which is the same core count as the RX 6900 XT (Navi 21 XTX GPU). This is a 20% reduction in cores compared to the full-fat Navi 21 GPU.

Navi 33 is essentially going to be a Navi 23 replacement on the GFX11 'GFX1101' architecture and we know that Navi 23 only features 2048 cores, half the amount that's allegedly featured on Navi 33. The Navi 23 GPU has been featured on the Radeon RX 6600 series cards so one can assume that Navi 33 will power AMD's RX 7600 series. As for the memory configuration, it is reported that the card should be enough for gamers at 1080p with a 128-bit bus interface and 8 GB of VRAM but considering that the top chip, Navi 31, offers a 384-bit bus, it is likely that AMD could use 12 GB of VRAM across a 192-bit bus interface and Navi 32 could end up with 256-bit bus with 16 GB VRAM.

The Navi 33 (RDNA 3) GPU featured on the AMD Radeon RX 7600 series graphics card is expected to carry 128 MB of Infinity Cache but it may not get the MCD treatment like the Navi 31 and Navi 32 parts.

This would bring the performance of the AMD Radeon RX 7600 series above the RX 6800 and RX 6900 series at a TDP of around 200W (180-230W). There's also talk about the PCIe interface being Gen 5.0 along with an x8 link and that doesn't seem like something to worry about since Gen 4 and Gen 3 x8 links can feed the card with enough bandwidth. Efficiency will be a really strong suite of AMD's RDNA 3 and the red team is going to have a significant lead over NVIDIA's GeForce RTX 40 'Ada Lovelace' lineup which is expected to be very power-hungry.

AMD RDNA 3 Navi 3X GPU Configurations (Preliminary)

GPU Name	Navi 21	Navi 33	Navi 32	Navi 31	Navi 3X
Codename	Sienna Cichlid	Hotpink Bonefish	Wheat Nas	Plum Bonito	TBD
GPU Process	7nm	6nm	5nm/6nm	5nm/6nm	5nm/6nm
GPU Package	Monolithic	Monolithic	MCM (1 GCD + 4 MCD)	MCM (1 GCD + 6 MCD)	MCM (TBD)
GPU Die Size	520mm2	203mm2 (Only GCD)	200mm2 (Only GCD) 425mm2 (with MCDs)	300mm2 (Only GCD) 522mm2 (with MCDs)	TBD
Shader Engines	4	2	3	6	8
GPU WGPs	40	16	30	48	64
SPs Per WGP	128	128	128	128	128
Compute Units (Per Die)	80	32	60	96	128 (per GPU) 256 (Total)
SPs (Per Die)	5120	2048	3840	6144	4096
ALUs (Per Die)	5120	4096	7680	12288	16384
Memory Bus	256-bit	128-bit	256-bit	384-bit	384-bit x2?
Memory Type	GDDR6	GDDR6	GDDR6	GDDR6	GDDR6
Memory Capacity	Up To 16 GB	Up To 8 GB	Up To 16 GB	Up To 24 GB	Up To 32 GB
Memory Speed	16-18 Gbps	TBD	TBD	20 Gbps	TBD
Memory Bandwidth	512-576 GB/s	TBD	TBD	960 GB/s	TBD
Infinity Cache	128 MB	32 MB	64 MB	96/192 MB	TBD
Flagship SKU	Radeon RX 6900 XTX	Radeon RX 7600 XT? Radeon RX 7700M?	Radeon RX 7800 XT? Radeon RX 7900M?	Radeon RX 7900 XTX	Radeon Pro
TBP (Max)	330W	~150W	~250W	335W	TBD
Launch	Q4 2020	Q4 2022?	Q4 2022?	Q4 2022?	2023?

AMD Navi 33 GPU Features, Pricing, Performance 'Rumored'

As for performance, the AMD Radeon RX 7600 XT based on the Navi 33 GPU is expected to offer a 6900 XT class or better performance in ray tracing but given the reduced memory design, it will take a hit as the resolution increases. So the card would be faster at around 1080p and similar at 1440p but will end up equal or slower at 4K and higher due to the 8 GB VRAM limitation. Raytracing is expected to be a strong suit with the card offering higher than 6900 XT performance. Now 8 GB might sound like a downgrade versus the 6900 XT but given the pricing, it might actually end up as a great decision that not only reduces costs but also allows the card to be made in larger quantities without the worry of GDDR6 supply.

The pricing of the AMD Radeon RX 7600 XT graphics card is expected to be set around $400 US or less which is in line with the RX 6600 series graphics card since the 6700 XT had an MSRP of $379 US. A cut-down model could end up under $350 US too. The main thing is that if rumors are true, then you can have 6900 XT performance at less than half the price which should be impressive & a hot seller in the mid-range segment.

AMD RDNA Generational GPU Lineup

Radeon Lineup	Radeon RX 5000	Radeon RX 6000	Radeon RX 7000	Radeon RX 8000
GPU Architecture	RDNA 1	RDNA 2	RDNA 3 / RDNA 2	RDNA 4
Process Node	7nm	7nm	5nm/6nm	4nm?
GPU Family	Navi 1X	Navi 2X	Navi 3X	Navi 4X
Flagship GPU	N/A	Navi 21 (5120 SPs)	Navi 31 (6144 SPs)	Navi 41 (Cancelled?)
High-End GPU	Navi 10 (2560 SPs)	Navi 22 (2560 SPs)	Navi 32 (4096 SPs)	Navi 48 (4 SEs?)
Mid-Tier GPU	Navi 12 (2560 SPs)	Navi 23 (2048 SPs)	Navi 33 (2048 SPs)	N/A?
Entry-Tier GPU	Navi 14 (1536 SPs)	Navi 24 (1024 SPs)	Navi 34 (1024 SPs)?	Navi 44 (2 SEs?)

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