A fresh report from Igor’sLAB puts a new claim on Navi 21 power consumption.
AMD Navi 21 XT to feature 320W TGP/TBP
Igor Wallossek published his first ‘big leak’ on Big Navi. According to his data, AMD Navi 21 XT will feature TGP at around 320W, not 255W as reported earlier. The difference comes from the wrong use of TGP nomenclature (Total Graphics Power) for both AMD and NVIDIA in an earlier report. Those values are not equal and do not represent the same thing (at least in that context), as Igor explains.
The values reported earlier were only representing the GPU socket power (GFX, SOC, and VDDCI). This is totally opposite to NVIDIA’s TGP, which represents the power consumption of the whole graphics card. That said, the value of 255W was only illustrating the socket power for the AIB card, not the power of the whole custom graphics card.
Taking that into the account, Navi 21 XT would have a stock GPU power of 235W. Thus the TBP (total board power) of AMD Radeon RX 6000 graphics card based on Navi 21 XT would be at around 320W. This number will increase to 355W for custom boards.
Igor also included the first GPU power values for Navi 21 XL, the cut-down variant. This model is allegedly featuring a TGP (or GPU power if you will prefer) of 203W with TBP expected at 290W.
Navi 21 16 Gbps GDDR6 memory
The Radeon RX 6000 graphics card based on Navi 21 will use Samsung 16 Gbps memory modules (K4ZAF325BM-HC16). According to the report, this is a GPU and memory bundle from AMD offered to board partners, it does not mean AIBs will only rely on Samsung memory, but it does confirm that the spec has been set to 16 Gbps.
Navi 21 Availability
The report also covers AMD Navi 21 availability. According to the article, the first custom boards will be available mid-November with bigger availability around the end of November. The board is reportedly easy to work with as it resembles Navi 10 (RX 5700) board design substantially. This is more than likely related to the 256-bit memory bus and its memory layout.
AMD is set to announce its Navi 21 graphics card on October 28th.
Update: Igor updated the charts which incorrectly mentioned TGP instead of TBP. Below is an updated version.
AMD Radeon RX 6000 Navi 21 XT REFERENCE TGP/TBP, Source Igor’sLAB
AMD Radeon RX 6000 Navi 21 XT CUSTOM TGP/TBP, Source Igor’sLAB
AMD Radeon RX 6000 Navi 21 XL TGP/TBP, Source Igor’sLAB