We have some new info to share with you regarding AMD’s Big Navi GPU lineup. Last month, AMD officially announced its RDNA 2-based flagship Big Navi graphics cards, the Radeon RX 6900 XT, RX 6800 XT and RX 6800, respectively.
AMD launched the Radeon RX 6800 and RX 6800 XT series of graphics cards on November 18th, and many third-party reviews were also published. The RX 6800 XT will be priced at USD 649 while the RX 6800 will be priced at USD 579. The AMD Radeon RX 6900 XT flagship card on the other hand will be available on December 8th and will cost around $999 USD.
All the above three GPUs were based on the NAVI 21 GPU silicon. Other SKUs in the Navi lineup were notably missing from the announcement, such as the cards based on the NAVI 22 GPU, which will target the upper mid-range GPU market segment.
In a recent Tweet coming via Patrick Schur, some details on the power requirements and specs have been shared for this Navi 22 GPU core. AMD has not yet officially confirmed any of these specs, so you should treat this as a Rumor.
NV22 XT 186-211 W TGP (RX 6700 XT) ?
NV22 XTL 146-156 W TGP (RX 6700?)
12 GB GDDR6
— Patrick Schur (@patrickschur_) November 20, 2020
It's also possible that NV22 XTL has a lower min. TGP than 146 W. I'm not 100 % sure about that. So far I haven't seen any NV22 XTL with less than 146 W TGP.
— Patrick Schur (@patrickschur_) November 21, 2020
According to the info posted, the upcoming AMD Radeon RX 6700 series will succeed the RX 5700 series with the same core count, but will have better power efficiency, and higher clock speeds. The NAVI 22 GPU will initially come in two SKU flavors, the Radeon RX 6700 XT and the Radeon RX 6700, respectively.
The Radeon RX 6700 XT will be based on the NAVI 22 XT GPU, whereas the non-XT plain RX 6700 GPU variant will sport the NAVI 22 XTL silicon.
According to Patrick, the RX 6700 XT GPU is expected to feature a Total graphics power/TGP of between 186 to 211 Watts. The power consumption of this SKU is still expected to be lower than the RX 5700 XT GPU (225 Watts). This RX 6700 XT GPU will have a total of 40 Compute Units, same as the previous gen RDNA 1 Navi 10 GPU.
The RX 6700 non-XT, on the other hand would feature a TGP of between 146 to 156 Watts. Both of these SKUs based on the Navi 22 silicon will have a 192-bit wide Memory Bus interface, and will sport 12 GB of GDDR6 VRAM. Though, 6 GB VRAM config is also possible.
AMD is currently expected to launch the Radeon RX 6700 series in January 2021. AMD Navi 22 will also come to notebooks/laptops as a high-end gaming GPU, similar to NVIDIA’s GA104 Mobile chip.
Also when it comes to the power consumption figures, AMD calls the power consumption of the entire card as TBP (Total/Typical Board Power) while NVIDIA calls the equivalent as TGP (Total Graphics Power). These values are not equal and do not represent the same thing for both AMD and NVIDIA.
Previous reported rumors on the Navi 21 TGP value only took into consideration the GPU socket power (i.e. GFX, SOC, and VDDCI), and VRAM.
NVIDIA’s TGP figures are based on the entire board’s power consumption, which includes GPU, VRAM, VRM, fans & everything else that feeds on the power. The AMD equivalent of TGP is TBP, and the values reported earlier were in fact just the GPU and VRAM figures alone.
As Igor explained before, in AMD’s Graphics Power ONLY the supply voltages of the GPU for the GFX controller (VDDCR_GFX) and SOC controller (VDDCR_SOC) are included as the most important component, as well as the supply voltages for the memory such as VDDMEM and VDDCI (controller and bus).
So AMD’s graphics power is not equal to Nvidia’s TGP, since that represents the power consumption of the whole graphics card.
RDNA 2 GPUs are fabbed on an optimized 7nm process node, and they will support hardware-level ray tracing as well, and are expected to deliver a 50% increase in performance per watt over previous-gen RDNA arch.
Along with an improved performance-per-clock (IPC), and logic enhancement that helps reduce the design complexity and switching power. The GPU clock speeds are also going to get a boost.
Stay tuned for more!