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10-08-2021 11:11 PM #1ROG Member Array
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- Apr 2014
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Rampage VI Apex + 7820x - M.2 Only running at 2x
Hello, I've recently updated the BIOS on my APEX board to the latest 3501 version and installed windows 11 but noticed I had some disk access issues.
The problem I've found is my Samsung 960 is using PCIe 3.0 2x.
I've got the 28-lane 7820x, with one graphics card, and the 960 pro plugged into the DIMM.2_1 socket of the CPU DIMM.2 slot.
I've turned off SATA, USB 3.1, Wifi, Bluetooth, Audio and a few other things as I don't use much. Looking at the manual and reading other posts it seems that the DIMM.2_1 slot should support x4 speed which should let me 960 stretch it's legs but I can't seem to force the board to use that spec. It always seems to connect at x2 and limit my speeds to around 1700mb/s.
I'm also using the latest ME version.
Any help would be appreciated.
Thank you.
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10-09-2021 06:00 AM #2ROG Guru: Orange Belt Array G75rog PC Specs
G75rog PC Specs Motherboard R VI Apex Processor I9-7900X Memory (part number) 64GB Gskill Trident Z Graphics Card #1 AMD Radeon VII EKWB water block Graphics Card #2 Waste of PCI lanes in NVME environment Sound Card Stock Monitor LG 34" Ultra Wide3440x1440 Storage #1 4ea 960 Pro 2TB, 2ea 970 Evo 2TB Storage #2 1ea 960 Pro 1 TB, 1ea 970 Pro 1TB CPU Cooler EKWB CPU, Swiftech Res/pump, 400mm Rad Case Thermaltake View 91 Power Supply NZXT Hale 90 1200W Keyboard Logitech G910 Mouse Razer Ouroboros OS W10 64 1809, 1903, Ubuntu Linux Network Router Netgear R9000 + 4ea R9000 AP's, 10 Gb Switch Accessory #1 Hyper M.2 X16 V2 Accessory #2 10GB network via Intel 550 Nic Accessory #3 2 10GB Asustor NAS 7000 series
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- Jan 2013
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A 79xx series cpu would solve that. The 7820 just doesn't have enough pci lanes to support all the Apex functions.
I run an Apex with a 7900x and 8 nvme drives all running pcie 3.0 4x. Happy machine.
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10-09-2021 06:52 AM #3Administrator Array
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- Mar 2016
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Hello, as above the lower SKU CPU have reduced lanes on this platform.
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10-17-2021 07:51 PM #4ROG Member Array
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- Apr 2014
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I heard this but the manual does say otherwise. I bought an i9-10900x as a little upgrade, but decided not to go ahead with the purchase as it had some heavy heat damage on the underside. I did use it briefly to check the motherboard/SSD. I had the extra options available in the BIOS regarding the other PCI slots, but the SSD still ran at x2.
Plan B was to purchase a small PCI m2 card to test the SSD in a regular PCI slot. It still ran at x2.
Seems it's the SSD that's the issue! Problem solved. Now I've got issues setting up a RAID... haha might just have to keep CPU hunting.
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