QUOTE(owikh84 @ May 15 2020, 09:12 PM)
10900K @ 5.0GHz ~ 80-87c on 240mm AIO ft. ROG Strix Z490-A mobo.
Only Z490 Extreme supports PCIe4 on the M.2 port.

Source:
https://www.cool3c.com/article/153618 oh that one we know why cause that dimm m.2 uses pcie 3.0 atm one from pch and another from the cpu.. so the cpu will lose out on the pcie 16x for gpu
so not surprising it can do pcie 4.0. think it was kit guru or oc3d that mention the pcie 3.0 from cpu...
but the issue for next gen is.. whats the point the dmi will will be 3.0 and the chipset all will be 3.0..
this upgrade part i think no point as we all know what happen with sandy bridge before vs ivy bridge...
z490 nobody gonna use the next gen cpu on this and always intel will optimize some power config that will force u to buy the next chipset...

HERO
1 x M.2_1 socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)*3
1 x M.2_2 socket 3, with M key, type 2242/2260/2280 storage devices support (PCIE 3.0 x 4 mode)*4
1 x M.2_3 socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)
CODE
*2 The PCIEX16_3 shares bandwidth wih M.2_2. The PCIEX16_3 will be disabled when M.2_2 runs x4 mode.
*3 When M.2_1 is operating in SATA mode, SATA6G_2 will be disabled.
*4 M.2_2 shares bandwidth with PCIEX16_3. When M.2_2 runs x4 mode, PCIEX16_3 will be disabled. When M.2_2 runs x2 mode, PCIEX16_3 runs x1 mode.
*5 M.2_3 shares bandwidth with SATA6G_56. When M.2_3 is populated SATA6G_56 will be disabled.
FORMULA
1 x M.2_1 socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)*4
1 x M.2_2 socket 3, with M key, type 2242/2260/2280 storage devices support (PCIE 3.0 x 4 mode)*5
1 x M.2_3 socket 3, with M key, type 2242/2260/2280 storage devices support (PCIE 3.0 x 4 mode)*6
CODE
*2 The PCIEX16_3 shares bandwidth wih M.2_3. When M.2_3 runs x4 mode, PCIEX16_3 will be disabled. When M.2_3 and PCIEX16_3 are both occupied, M.2_3 runs x2 mode, PCIEX16_3 runs X1 mode.
*3 The PCIEX1 shares bandwidth with M.2_1. When M.2_1 runs x4 mode, PCIEX1 will be disabled.
*4 M.2_1 shares bandwidth with PCIEX1. When PCIEX1 is occuppied, M.2_1 runs x2 or SATA mode (when M.2_1 runs SATA mode, SATA6G_2 will be disabled).
*5 M.2_2 shares bandwidth with SATA6G_56. When M.2_2 runs x4 mode, SATA_56 will be disabled. M.2_2 runs x2 mode by default.
*6 M.2_3 shares bandwidth with PCIEX16_3. When PCIEX16_3 runs x4 mode, M.2_3 will be disabled. When M.2_3 and PCIEX16_3 are both occoppied, M.2_3 runs x2 mode, PCIEX16_3 runs X1 mode.

EXTREME
1 x ROG DIMM.2 Module supports 2 M.2 Socket 3 , with M key, type 2242/2260/2280/22110 storage devices support (PCIE 3.0 x 4 mode)*2
IntelĀ® Z490 Chipset :
1 x M.2_1 socket 3, with M Key, Type 2242/2260/2280 (PCIE 3.0 x4 and SATA modes) storage devices support*3
1 x M.2_2 socket 3, with M key, type 2242/2260/2280 storage devices support (PCIE 3.0 x 4 mode)
CODE
*1 PCIEx4 slot shares bandwidth with SATA6G_56 and PCIEx4 slot is default set at x2 mode. Please adjust BIOS settings to enable Thunderbolt card.
*2 The DIMM.2 Slots are disabled by default. Please adjust BIOS settings to enable DIMM.2 Slots.
*3 When M.2_1 is operating in SATA mode, SATA6G_2 will be disabled.
*4 USB 3.2 Gen 2x2 works at PCIe 3.0 x2 speeds
and ahem dat 5.1ghz reference was about ahem that pic... that person claimed.. p95 26.6
This post has been edited by cstkl1: May 16 2020, 12:31 AM