ckelas
firstnomad
Just chiming in here to add my experience: I purchased secondhand, but BNIB, an early-run 3090 FTW3 Ultra with red lips and a serial number beginning with 2014 (manufactured in Taiwan). It exhibited many of the same characteristics discussed in this thread and was perhaps one of the worst samples in comparison to those I've seen here - it would struggle to pull over 390W even on the stock OC BIOS with the power limit at 107%, and capped out at maybe 80W on the third 8-pin. The XOC BIOS only made it worse.
I called and spoke to a very accommodating service representative who wasn't familiar with the problem but was happy to hook me up with an RMA after a lengthy and detailed explanation of why power delivery isn't supposed to work like this.
Fast forward to today; I received the RMA - black lips this time, but still serialed 2014 and manufactured in Taiwan. It works perfectly - on the stock OC BIOS with power limit at 107% it sits right around 445W in Heaven with spikes up to ~460W. I honestly don't even have any inclination to flash the XOC BIOS at this point because heat is now my primary concern.
I highly recommend anyone experiencing this problem just RMA their card and roll the dice on getting one that actually performs to spec. This is clearly a hardware problem with the early runs.
Thank you for sharing your experience bro.
Can I please ask you to elaborate on your liaising with the representative?
What was it that you had to explain to them, and what did you tell them?
I simply explained its behavior: The PCIe slot was pulling power over spec (in my case, 83W; 8W over the standard of 75) while the third 8-pin was pulling a good ~40W lower than the other pins. Also in my case, the power limit was being hit while monitoring tools were still showing values under the appropriate setting. E.g. When the limit was placed at 107%, the power limit would engage with Precision still showing 97-98% consumption. I basically made the case that the 35-40W being lost off the third 8-pin pretty much directly corresponds to the proportion of power that is being "missed" by the monitoring tool, and furthermore suggested that there may be a blown sensor preventing the correct reading and affecting vBIOS behavior. I also mentioned the fact that this exact issue has been plaguing people on their forums, and that hardware revisions seem to be a factor.
I had called during after-hours support and the rep initially suggested that I could call back during regular hours the next day and speak to a technical service lead, but also conceded that it seemed like I knew more about the issue than he did and accepted my request to go ahead with the RMA regardless. He even upgraded it to a cross-ship RMA even though I have a secondhand card, and the new, correctly-functioning one got here in time for Cyberpunk.