Questions tagged [pci-express]
PCI-Express is a high-speed expansion bus which is developed to replace older buses such as PCI and AGP. The most common use of PCI-Express is the GPU installation on motherboards.
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How PCIe lanes are splitted when MB supports 1 PCI 4.0 x16 and 1 PCI 3.0 x16 slots?
I have an AMD 5800x, which has 20 pcie 4.0 lanes.
I want to put 2 GPUs (both support pcie 4.0) in a motherboard with 2 PCIe x16 slots, but 1 of them is version 4, and another is version 3.
4 lanes are ...
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Why is my GTX 970 working with the motherboard HDMI port, and why is my iGPU disabled on Asus ROG Strix Z690-A gaming WIFI motherboard?
I wanted to test the integrated graphics on my i7 12700 K CPU, so I unplugged the HDMI from the GTX 970 card and plugged it in the motherboard HDMI port. To my surprise, the 970 card was being output ...
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Linux won't post with (amd 340x) gpu in the pcie slot. (MacMini running Linux)
I'm running Ubuntu 22 on an intel Core 2 Duo MacMini. It's a 64-bit OS, but the EFI is 32-bit. The motherboard uses a fully featured mini-pcie slot for its network card, which has proven to be able to ...
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Does a RTX 3070 Ti with 2 x 8 PCIe power cables draw power from the PCIe slot?
I wonder if a RTX 3070 Ti with 2 x 8 PCIe power cables will draw power from the PCIe slot. I don't refer to the standby power, but to the main power. Will it be zero or will it draw its main power ...
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NVMe PCIe SSD using 2 lanes instead of 4
I recently installed an WD Blue SN570 500GB NVMe SSD in my HP laptop and I did a benchmark test in crystal disk software and got 1700MBps read speed but this SSD supports 3500MBps.
When I checked in ...
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Wha functionalities does "Signal processing controller: Intel Corporation 100 Series/C230 Series Chipset Family Thermal Subsystem (rev 31)" provide?
I'm setting up libvirt powered virtual machine for Windows10, on my Debian host, with passthrough-ed NVIDIA GPU. Everything goes well until I want to passthrough a USBHUB into the VM for convenience ...
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Diagnosing an intermittently failing M2 PCIe I225v NIC in PCI passthrough
I am using a M2 PCIe I225v NIC (http://www.iocrest.com/index.php?id=2316) as a PCI passthrough on my Proxmox host - passed to a pfSense VM (running freeBSD-14, but same occurs on freeBSD-13). It's ...
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RTX 4090 into PCIe 5.0 x8 slot (Z790)
I have an RTX 4090 and the ASUS Z90 Maximus Hero (Users Manual). I need to install it into the second PCIe 5.0 slot, but the manual shows that the 1st (PCIEX16(G5)_1) and 2nd (PCIEX16(G5)_2) slot are ...
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How to convert PCIe3 to PCIe2 using a PCI adapter
I have a new HP Z2 G9 workstation featuring the following expansion slots:
1 PCIe 3 x4 (x16 connector); 1 PCIe 3 x4 (x4 connector); 1 M.2 2230 PCIe 3 x1; 1 M.2 2280 PCIe 4 x4; 1 M.2 2280 PCIe 3 x4; 1 ...
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Can I have two PEX8748 downstream ports to communicate w/ each other?
The setup is like this: One host connects to one NVMe card which uses a PEX8748 to connect the SSDs. What we want is to have two such NVMe ports connected using a cross cable (TX - RX, and vice versa),...
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Can M.2 slots be combined? (And other questions) [closed]
I'm looking around on google for information about M.2, chiefly regarding using it for eGPUs, but information is scattered and I'm not really getting anywhere with it. I need some help.
-M.2 slots can ...
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Network Interface Card not using the correct PCI link width
I am running a Mellanox PCIe card that uses PCIe 4.0 x8 that should be running at 16GB/s. This is connected into a PCIe 3.0 x16 slot on this motherboard. This also runs at 16GB/s and I should be able ...
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Adding Thunderbolt 3 capability to desktop
I have a desktop for which I desired to utilize the front panel usb c port as a thunderbolt aware connection. I subsequently realized since I do not have a lighting icon next to the port it is not ...
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Enabling the 16 lane PCIe slot on the Lenovo ThinkCentre Edge 71
The Lenovo ThinkCentre Edge 71, type 1578, has two single-lane PCI Express slots and one sixteen-lane PCI Express slot. Devices inserted into the ×1 slots (for example, NVMe adapters) work fine. ...
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Bus ID to Physical PCIe Slot Mapping
I have identical GPUs connected to 2 PCIe slots. On linux, I can find out the bus IDs using nvidia-smi. How can I map the bus ID to the physical location of the PCIe slot on the motherboard? Thanks.
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How can I understand the device topology?
I am having trouble understanding the device-model and PCIe topology on my system. I've listed the output I've been looking at and attempted to explain my mental-model of what's there in hopes it ...
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What is an NVMe controller?
This question may sound trivial but it isn't.
Take a look at this image.
You can see Windows device manager listing NVMe controllers. I expected it to list NVMe disks but not controllers.
It does not ...
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Is there anything to gain by installing a second, non-identical video card in a PCIe x4 slot?
I'm in the position of trying to get the most out of the hardware I can afford; pursuant to that, I have an AMD Fx8350 with 32 GB RAM installed, a Gigabyte ATX motherboard that has two full length ...
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Can I use a m.2 key "a" to PCIe converter to run my Asmedia ieee1394 firewire card?
I have an HP Omen 875-0034 Desktop computer with a Version 00 Edoras motherboard SSid: 84FD
Chipset: H370. Is it possible to run my PCIe Asmedia ieee1394 firewire card(1 lane) using this M.2 key A/E ...
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Why is NVMe better than ATA?
SATA M.2 SSDs use SATA on the physical layer and ATA as software protocol for data transmission.
NVMe M.2 SSDs use PCIe on the physical layer and NVMe as software protocol for data transmission.
I was ...
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Duplicate PCI device id (lspci -nn)
I have two identical network cards installed in my system (same device, same vendor).
Now I wanted to stub one network card in order to use PCIe passthrough.
I've come to realize that the two network ...
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What is downstream port PCIe switch bifurcation?
The NVIDIA Bluefield-3 spec sheet lists the following as its PCIe spec:
32 lanes of PCIe Gen 5.0
PCIe switch bi-furcation of up to 16 downstream ports
Would this mean the device can run on anything ...
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Telit LM960a18 Module bricked - USB deactivated - How to unlock?
I tried to switch a Telit LM960a18 mini-pcie module into mbim mode. Following a guide on Techship.
I used the commands:
AT#USBCFG=2
AT#REBOOT
However, instead of setting the module into mbim-mode, I ...
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Bind / Unbind one PCIe device disables other
I have 2 SFPs, Both are plugged-in.
lspci shows they are at 0000:05:00.0 and 0000:05:00.1.
The device at 0000:05:00.0 is designated as "sfp2" and the device at 0000:05:00.1 is "sfp1&...
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Is an M.2 Wi-Fi card backwards compatible with regular PCIe?
So I have this HP laptop from 2014 which has a Realtek RTL8188EE 802.11bgn Wi-Fi card. There have been issues with it. I know it's a PCIe Wi-Fi card. I've been looking for replacements, like the Intel ...
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Intel DZ77RE-75K fails to post with LSI 2008 SAS HBA installed
I am trying to repurpose proven working Intel DZ77RE-75k system for my home server by installing an LSI 2008 HBA to attach my existing ZFS array.
As soon as I install the HBA the system will fail to ...
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Increasing PCIe Bandwidth Available to a 10 GbE NIC
I am running Red Hat Enterprise Linux 8.0 (RHEL 8.0) on a Dell 7920 Rack. This machine has 8 GB of RAM. I do not have the option to add more RAM (its hardware configuration is locked down).
This ...
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Can you help me find out if my HP Notebook motherboard supports both M.2 SATA and M.2 PCIe SSD?
I would like to purchase an SSD for my HP Notebook of the following specification board specifications
I would like to know if the motherboard supports SSD of M.2 form factor. If it does support, I ...
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Motherboard doesn't POST with pci network card plugged in, but both motherboard and network card work fine if network card is hot-plugged
I recently got my hands on some old computer parts. An Asrock H61m-DPS motherboard, an intel i3-2120, and a D-link DGE-530T rev-B2 PCI gigabit ethernet card.
After I finished building this PC, I ...
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Struggling with X670E PCI Lanes
I'm struggling to understand how many lanes I'll get from an X670E build:
Here the specs of the machines I would like to build:
7950x
ASUS ProArt X670E-CREATOR
Corsair Vengeance DDR5 32GB (2x16GB) ...
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How to determine if there is a support for NVMe
I have Acer Aspire 3 A315-53G, I want to upgrade my laptop with m.2 SSD. There is a slot for it but the manual of laptop doesn't provide any info on it, I asked official support but the answers are ...
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How do I attach a 4-lane PCI Express HDD controller card to the so-called U.2 connector of a Mixtile Blade 3?
I'd like to use a part of my Mixtile Blades as storage nodes with SSD attached to them. The SSDs are situated in a backplane system with miniSAS (SFF-8643) jacks on the back, one for 4 drives, the Icy ...
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Linux Kernal 5.15.0-50 PCI device enumeration diff. from 0-48
I've been using Ubuntu on a Dell laptop successfully for some time but yesterday when booting the OS seemed to fail to enumerate all the devices.
The symptoms were that the Wi-Fi module, the track ...
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Is it possible to disable an M.2 SSD without physically unscrewing it?
I want to be able to "hide" the presence of my M.2 NVMe ssd. For example, it can be useful when experimenting with OS installation to experimental drive, and you want to be sure it wont ...
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Maximum HDD size supported by drives connected via PCI Express
is the maximum supported HDD size of drives that are connected via PCI Express expansion cards limited by the motherboard of the PC or by the PCI Express card/driver?
Why do I want to know that? I ...
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PCIe x8 card produces boot loop in PCIe x16 slot on Gigabyte GA-B75N board
I have a Gigabyte GA-B75N board (https://www.gigabyte.com/de/Motherboard/GA-B75N-rev-10/support) together with an i3-3240 and a LSI SAS9223-8i (a IBM OEM part: https://lenovopress.lenovo.com/tips0856-...
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BIOS not waiting for USB3 PCIe device to inititialize Asus Z170 Sabertooth
I have a USB3.0 over fiber extender PCIe card which I'm trying to get to work in my Asus Z170 Sabertooth motherboard. The device is basically a USB3.0 hub at the end of a invisible SFP+ network. The ...
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How does PCIe card vendors sign option ROMs?
If secure boot is enabled UEFI system would permit to run only signed Option ROMs.
I presume PCIe card vendors want their devices to work even if Secure Boot is enabled. Therefore how does PCIe card ...
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Is a half-length PCI Express x8 Gen 3 card compatible with a PCIe x4 Gen3 slot?
I have a card with a half-length PCI Express x8 Gen 3 output. Is it compatible with Dell Precision 3660 Tower which has one PCIe x4 Gen3, one PCIe x4 Gen4, and one PCIe x16 gen5 (for the GPU only)? ...
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Does the PCIe root complex have the same GPU-GPU performance compared with discrete PCIe switch?
Example system 1: SuperServer 420GP-TNR with 2 CPU and 8 GPU. Each CPU and 4 GPUs connect to a 5-port PCIe switch, each PCIe 4.0*16 port is ~32GB/s (one direction). The two CPUs are connected with ...
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PCIE x4 or x16 for data Science?
Processor: i5 12600kf
Graphics Cards: RTX 3090 and RTX 3050
I have the MAG Z690 TORPEDO motherboard. This board has 3x PCIe x16 slots, as follows:
PCI_E1 (From CPU)
Supports up to PCIe 5.0 x16
PCI_E3 (...
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Unable to figure out the type of SSD I have
SSD:
Can anyone please help me find out whether this SSD is SATA M.2 or NVMe?
Thanks
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SSD not recognised as bootable after motherboard replacement
Since 2019, I have had a very nice PC setup at home - based around the following motherboard:
ASUS PRIME AMD Ryzen X470-PRO AM4 ATX Motherboard
However last week I discovered that my computer (which I ...
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Can I plug a graphics card with PCI Express 4.0 x4 interface into a motherboard with 1x PCIe 4.0/3.0 x16 slot?
I am planning to buy an MSI Radeon RX 6500 XT MECH 2X 4G OC graphics card and an ASUS PRIME B660M-A WIFI D4 motherboard. On the motherboard specs, it said :
Intel® 12th Gen Processors
1 x PCIe 4.0/3....
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Since my power supply doesn’t provide an 8 pin cable to connect it to my GPU, then what should I connect to my GPU?
I replaced this graphic card:
With this Asus Dual GeForce RTX™ 3060:
And this GPU needs 8 pins but my power supply has these. Since my power supply does not provide 8 pin, to connect it to my GPU, ...
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Is there a way to identify the PCIE Speed for a device using powershell (Win10)? [duplicate]
This way I can determine the transfer rate of the device and relate that to the generation of the PCIE device (PCIE 3.0, 4.0, etc)
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3.5mm PCIe Headset sound card I.e.same as laptop - not seperate mic socket
I recently built a few new PC's for our home and buying budget motherboards I was surprised I couldn't find any with headset output either for front panel or rear panel connections (its been 5 years ...
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PCIe link to NVMe drive downgrades to 2.5GT/s (PCIe 1.0) after writing data
I put a MKNSSDPL2TB-D8 NVMe drive in a Lenovo Thinkpad E595 laptop. When checking the speeds with dd, I noticed that they are not very good. It turns out that after the test,
the link speed was ...
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How can I switch the bandwidth of my PCIE 3?
I've been tinkering around looking for ways to downgrade the PCIE 3 bandwidth allocated for my Nvidia GPU from x4 to x2. My reason is I like to allocate x4 to my NVME SSD. I tried looking at BIOS, but ...
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GPUs benchmark terribly when in either of my PCI-E slots - motherboard issue?
System -> GTX 960/1060, Asus Z97-AR mobo, Core i5 4460, Windows 10
I've tried a 960 and 1060, both perform terribly in either of the PCI slots on the mobo. I've benchmarked the GPUs in a friend's ...
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