Author: parsec
Subject: PCIe3 x4 not working, don't mark solved
Posted: 08 Jan 2017 at 11:55am
First let's take a look at your board's layout, from the manual:
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The PCIe slots are labeled, PCIE1, PCIE2, and PCIE3. Those are simply names to identify the slots. They provide no information about the PCIe revision/speed that the the slot provides, they are just names for the three PCIe slots, 1, 2, and 3.
From your board's specifications:
2 x PCI Express 2.0 x16 Slots (PCIE2: x16 mode; PCIE3: x4 mode)
- 1 x PCI Express 2.0 x1 Slot
Your board has two PCI Express 2.0 (revision/speed) x16 physical slots, numbered 2 and 3.
The PCIE2 slot is x16 electrically (connected to 16 PCIe 2.0 lanes), and the PCIE3 slot is x4 electrically (connected to four PCIe 2.0 lanes.)
Sorry to say, but none of the AMD 900 series chipsets (like your 970) supports the PCIe 3.0 revision. The AMD processors used in these boards do not provide any PCIe lanes to the board, so you only get what is provided by the chipset.
Please see this page for basic specs of the AMD 900 series chipsets:
https://en.wikipedia.org/wiki/AMD_900_chipset_series
Subject: PCIe3 x4 not working, don't mark solved
Posted: 08 Jan 2017 at 11:55am
 floydstime wrote:First off. The asrock website specifically states that the PCIe Gen 2 x16 lanes are also "PCIe Gen 3 x4" as well. At one point, my system explorer in BIOS was reading the card as PCIe3 x4, but it was showing 5gbs actual with 10gbs max. Only after screwing with the BIOS does it state PCIe2 x16 now and it states 4gbs with 8gbs max. I need help configuring this computer to run PCIe3 x4 on my second PCIe x16 port at 10Gbs pci to pci bridge. I would appreciate it if you didn't start by telling me that I my board doesn't support it and marking the thread as solved when it is Not solved. Below is a repost of my first thread. So I am having trouble with getting my PCIe 3 x4 to work. There is no option in BIOS, that I have found, to force my second slot to run as PCIe Gen 3. I have a PM961 128 drive, but my read speeds are around 1200 mbs and my write speeds are 800 mbs. It should be twice that. Samsung Magician is showing link speed as 5gbs 10 gbs Max. It should be 10 and 10. Any help would be appreciated... EDIT: I have a 970m Pro3 with FX-6300, AMD HD7970 in second PCIe slot and SYBA M.2 PCIe to PCIe3.0 x4 adapter in my third PCIe slot. The PCIe3 x1 slot is empty. Drive in the Syba is a PM961 128 GB. |
First let's take a look at your board's layout, from the manual:
The PCIe slots are labeled, PCIE1, PCIE2, and PCIE3. Those are simply names to identify the slots. They provide no information about the PCIe revision/speed that the the slot provides, they are just names for the three PCIe slots, 1, 2, and 3.
From your board's specifications:
2 x PCI Express 2.0 x16 Slots (PCIE2: x16 mode; PCIE3: x4 mode)
- 1 x PCI Express 2.0 x1 Slot
Your board has two PCI Express 2.0 (revision/speed) x16 physical slots, numbered 2 and 3.
The PCIE2 slot is x16 electrically (connected to 16 PCIe 2.0 lanes), and the PCIE3 slot is x4 electrically (connected to four PCIe 2.0 lanes.)
Sorry to say, but none of the AMD 900 series chipsets (like your 970) supports the PCIe 3.0 revision. The AMD processors used in these boards do not provide any PCIe lanes to the board, so you only get what is provided by the chipset.
Please see this page for basic specs of the AMD 900 series chipsets:
https://en.wikipedia.org/wiki/AMD_900_chipset_series