Hi there,
I noticed that all my GPU operate at PCIe 1.1=2.5GHz instead of PCIe
2.0/3.0. Is there any way to force higher speed?
Hardware details below
---===### First system ###===---
CPU: i7-3770, Linux version 5.15.0-2-amd64
# dmesg | grep bandwidth
[0.224924] pci :01:00.0: 16.000 Gb/s available PCIe bandwidth,
limited by 2.5 GT/s PCIe x8 link at :00:01.0 (capable of 126.016
Gb/s with 8.0 GT/s PCIe x16 link)
# lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core
processor DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core
processor PCI Express Root Port (rev 09)
00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset
Family USB xHCI Host Controller (rev 04)
00:16.0 Communication controller: Intel Corporation 7 Series/C216
Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 7 Series/C216 Chipset Family
USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 7 Series/C216 Chipset Family
High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 7 Series/C216 Chipset Family PCI
Express Root Port 1 (rev c4)
00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset
Family PCI Express Root Port 2 (rev c4)
00:1c.3 PCI bridge: Intel Corporation 82801 PCI Bridge (rev c4)
00:1d.0 USB controller: Intel Corporation 7 Series/C216 Chipset Family
USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation Z77 Express Chipset LPC Controller
(rev 04)
00:1f.2 SATA controller: Intel Corporation 7 Series/C210 Series Chipset
Family 6-port SATA Controller [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 7 Series/C216 Chipset Family SMBus
Controller (rev 04)
01:00.0 VGA compatible controller: NVIDIA Corporation GK110 [GeForce GTX
780] (rev a1)
01:00.1 Audio device: NVIDIA Corporation GK110 High Definition Audio
Controller (rev a1)
03:00.0 Ethernet controller: Qualcomm Atheros Killer E220x Gigabit
Ethernet Controller (rev 13)
04:00.0 PCI bridge: ASMedia Technology Inc. ASM1083/1085 PCIe to PCI
Bridge (rev 03)
---===### Second system ###===---
CPU: i5-2500k, Linux version 5.15.0-2-amd64
# dmesg | grep bandwidth
[0.285635] pci :03:00.0: 32.000 Gb/s available PCIe bandwidth,
limited by 2.5 GT/s PCIe x16 link at :02:00.0 (capable of 126.016
Gb/s with 8.0 GT/s PCIe x16 link)
# lspci
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor
Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core
Processor Family PCI Express Root Port (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series
Chipset Family MEI Controller #1 (rev 04)
00:19.0 Ethernet controller: Intel Corporation 82579V Gigabit Network
Connection (rev 05)
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset
Family USB Enhanced Host Controller #2 (rev 05)
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset
Family High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset
Family PCI Express Root Port 1 (rev b5)
00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset
Family PCI Express Root Port 3 (rev b5)
00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset
Family PCI Express Root Port 4 (rev b5)
00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset
Family PCI Express Root Port 5 (rev b5)
00:1c.6 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset
Family PCI Express Root Port 7 (rev b5)
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset
Family USB Enhanced Host Controller #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation P67 Express Chipset LPC Controller
(rev 05)
00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset
Family 6 port Desktop SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family
SMBus Controller (rev 05)
01:00.0 PCI bridge: NVIDIA Corporation NF200 PCIe 2.0 switch (rev a3)
02:00.0 PCI bridge: NVIDIA Corporation NF200 PCIe 2.0 switch (rev a3)
02:02.0 PCI bridge: NVIDIA Corporation NF200 PCIe 2.0 switch (rev a3)
03:00.0 VGA compatible controller: NVIDIA Corporation GM204 [GeForce GTX
970] (rev a1)
03:00.1 Audio device: NVIDIA Corporation GM204 High Definition Audio
Controller (rev a1)
06:00.0 Ethernet controller: Intel Corporation 82572EI Gigabit Ethernet
Controller (Copper) (rev 06)
07:00.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6315 Series
Firewire Controller (rev 01)
08:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host
Controller (rev 04)
09:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network
Connection
---===### Third system ###===---
CPU: Ryzen 7 1700, Linux version 5.10.0-10-amd64
# dmesg | grep bandwidth
[0.647668] pci :22:00.0: 32.000 Gb/s available
