03-25-2020 02:53 AM - last edited on 03-05-2024 08:15 PM by ROGBot
03-26-2020 10:42 AM
03-29-2020 08:05 PM
BenJW wrote:
Hi, I am wondering about the same question. Also, the manual indicates on page 1-8 that with a 48 lane CPU, I can use PCIEX16_1 and PCIEX16_2 each with 16 lanes, PCIEX16_3 with 8 lanes, but only DIMM.2_1 and not DIMM.2_2 (each would have 4 lanes). In sum that's only 44 usable lanes with a 48 lane CPU (!). Similarly with a 44 lane CPU, the maximum number of usable CPU lanes seems to be only 40...
What happened to the remaining 4 CPU lanes (which are the main point of Cascade Lake X)?!
I am aware that there's also M2_1 and M2_2, but those are connected to the PCH (just as PCIEX4_1 sharing bandwidth with M2_2), so the DMI becomes a bottleneck if those two PCH M2 slots are occupied with fast SSDs.
03-31-2020 02:10 AM
BigJohnny wrote:
You left out the 4 dedicated to the DMI.
If you have a 99XX the last slot can only be X4. No matter which you have X16, X16, X8 or X!^, X16, X4 if the bottom slot is used DIMM.2_2 is not. Its one or the other. The only thing the extra lanes are any good is if you are running 3 way SLI or Xfire you can have two at X16 and the last at X8. IMO unless you are plugging quadro cards in and using it as a cad workstation more than two cards are a waste and some will argue that anything SLI is a waste but those arguments always come from the cheap seats. Yes some titles are not coded for SLI but thats on the DEVs there are plenty that are. I have at least 20 installed that support SLI and scaling with RTX and NVlink is almost 100%.
03-27-2020 02:49 AM
BlueScreen wrote:
I have the Rampage VI Extreme Encore with 2080ti's in PCIE slots 1 & 2, both running at x16. I have NVME SSD in slots M2_1 and M2_2. I also want to add NVME SSD in slots DIMM.2_1 and DIMM.2_2. The motherboard user guide page 1-8, seems to indicate that there will not be any PCIE lane conflict when using a 48-lane CPU but I would like to confirmation from someone who has a similar configuration before I shell out the money for the NVME drives.
Thanks.
03-29-2020 07:58 PM