Riptide Z790 PG

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   This is difficult to answer, without knowing which board, You are talking about
Take the Z790 PG Lightning
https://pg.asrock.com/mb/Intel/Z790%20PG%20Lightning/index.asp#Specification
You see the first slot is connected to the CPU, trhe second slot, to the chipset, but it only has 4 lanes.
The M.2 PCIE 5.0x4 is also connected to the CPU, but as You can see it doesn't share resources, otherwise it will be mentioned in the specs, under Slots and Storage.
one tip, x16 has 2 meanings
The length of the slot 9.5cm
The number of lanes provided
PCIE4 in this case is a x16 slot (length), but has only contacts for 4 lanes, which makes it a PCIE x16 slot running at 4
But it is all in the specs, on the website

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threadzipper1957 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 05 Mar 2022 Status: Offline Points: 9365	Post Options Post Reply Quote threadzipper1957 Report Post Thanks(0) Quote Reply Topic: Riptide Z790 PG Posted: 05 Apr 2023 at 4:29pm
	This is difficult to answer, without knowing which board, You are talking about Take the Z790 PG Lightning https://pg.asrock.com/mb/Intel/Z790%20PG%20Lightning/index.asp#Specification You see the first slot is connected to the CPU, trhe second slot, to the chipset, but it only has 4 lanes. The M.2 PCIE 5.0x4 is also connected to the CPU, but as You can see it doesn't share resources, otherwise it will be mentioned in the specs, under Slots and Storage. one tip, x16 has 2 meanings The length of the slot 9.5cm The number of lanes provided PCIE4 in this case is a x16 slot (length), but has only contacts for 4 lanes, which makes it a PCIE x16 slot running at 4 But it is all in the specs, on the website
	Kind Regards

Kajte Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 04 Apr 2023 Status: Offline Points: 20	Post Options Post Reply Quote Kajte Report Post Thanks(0) Quote Reply Posted: 04 Apr 2023 at 4:43am
	I have a question, if I connect a hard drive to M2_1, will pcie1 enter x8 mode then? Does this only happen when we connect the M2_5 drive ?