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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Reading and writing to pcie memories of endpoint devices when that memory is prefetchable

So, my problem is that I cannot read or write to prefetchable memories that are opened to me for pcie. I have two different setups: 1 - I have a linux kernel 4.9 root complex device, and also a 4.9 ...
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Could Windows 10 installed on AMD NVMe Raid be the cause of poor performance?

I just built a computer at work that will be used to deal with loads of SIARD files. The configuration is as follows: Asus TRX40 Prime Pro (90MB12F0-M0EAY0) (latest 0902 bios but same results on 0702)...
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Does the number of available PCIe lanes affect M.2 speed?

Situation I'm currently looking to use SBCs to fill a few server roles I want available on my home network. While looking at different SBC options I came across KHADAS, a group that sells SBCs that ...
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Monitor Data Transfers between GPU and CPU in Realtime

I am currently working on training deep learning models using my NVIDIA GPU devices. One of the main performance bottleneck is the slowness of data transfers between the GPU and CPU. Is there a way (...
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I'm unable to enumerate prefetchable endpoint devices behind a pci-e bridge

Here is my problem: I'm unable to get BAR addressing from prefetchable end-point devices behind a pci-e bridge. Can anyone help me about that? Here is what I did until now: 1- I'm able to get ...
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Can PCIe Gen 3.0 / x 4 bottleneck my GPU?

My motherboard has PCIe v3.0 / x 4. My GPU is a 2080 Super. I have a 27 inch 1440p monitor
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Is it possible to use a Dell HBA330 in an HP Z2 G4 Workstation?

Trying to install a Dell HBA330 SAS controller in an HP Z2 workstation. Getting BIOS error. 3 Major/2 Minor beeps on start-up and nothing. Tried the card in another computer and it works without ...
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Will an M.2 NVMe SSD take up PCIe lanes used by PCIe ports on my motherboard

As for my specific situation: I'm running an Asrock B450-HDV R4.0 with a Ryzen 5 3600 CPU and a Geforce 1080 GPU. As the board does not come with onboard WiFi, I intend to install a network card in ...
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What's the maximum number of lanes possible to use in a single PCI Express link? 16 or 32?

I always thought that the maximum number of lanes for a PCI Express link was 16. The most powerful and expensive gaming GPUs never offer more lanes, and I have never seen a motherboard featuring a ...
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Is it possible to use VFIO passthrough with multiple GPU's to one VM with NVIDIA SLI support?

I've moved to Debian a while ago and miss a few Windows programs and especially games. Both dual booting and using WINE is very tedious (though for different reasons). PCI passthrough seems like the ...
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PCIe Lanes - Onboard M.2 SSD

Im having some issues with installing PCIe NVMe drives into my PC. PC Specs MB: Asus Maximus VIII Hero Alpha CS: Z170 CPU: i7 6700k VC: 1070 GTX I purchased an Asus Hyper NVMe 16x PCI adapter and ...
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Can I use PCIe SSD card in my motherboard?

My motherboard Name: GA-H61M-S2PV (rev. 2.2) Detail link: https://www.gigabyte.com/bd/Motherboard/GA-H61M-S2PV-rev-22/sp#sp Expansion Slots: 1 x PCI Express x16 slot, running at x16 (The PCI ...
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In the PCI1 slot, is there a way to tell what the max bandwidth would be for this port based on the given information?

I used the "sudo lshw -X" command. In the PCI:1 slot, is there a way to tell what the max bandwidth would be for this port based on the given information? Reason I ask is to check if it is worth ...
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Can I set up a Raid 0 and access it on Mac + Win 10

I have a Z820 with two OS PCIe SSDs: 960 Pro NVMe (Windows 10 OS) 970 Plus NVMe (MacOS Mojave) Can I set up a RAID 0 storage array [Highpoint 3740A] using two 4TB HDDs, then access the storage array ...
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Memory mapping an NVMe SSD over PCIe interface

My question is about curiosity more than a need, or a problem. I can absolutely use my solid state drive. But, just for fun, today I tried to use my drive over an interface I am familiar from before, ...
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PCIe 4.0 - What generation should I pick in my bios to turn off PCIe 4.0? 5700XT Black Screen Fix

I have a AMD RX 5700XT GPU paired with a Ryzen 2700x CPU, and have been having a ton black screen crashing while gaming. My computer stays on, sound stays on, but both my screens turn black. There's ...
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How to choose the right GPU topology (PCIe lanes) for multiple GPUs

I have found some sources on how to choose PCIe lane for multi-GPU setup (like this one on this site) but still could not find a good reference that answers this question: "How should one choose PCIe ...
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Will my PCIe Card fit into my PCI Case [closed]

I was recently planning on some things to get for a PC I was going to build, I finished my list and made sure everything was compatible, and then, I was going through a final check, and then at the ...
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X570 mainboard (ASRock X570 Phantom Gaming 4) has two M.2 slots. Where to install system SSD?

The ASRock X570 Phantom Gaming 4 mainboard has two M.2 slots specifically for SSD. Which should I use for the system boot SSD? One is close to the PCIe slot for the graphics card. Is there any ...
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My PCIe WiFi 6 card only works after I cut the power to the PC for ~> 20 seconds. What could be wrong?

On my desktop PC I have an issue where my Wifi PCIe card is not recognized at all when I boot the computer in the morning, after it was shut down the night before. It's a dual boot system and it's the ...
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Server takes 13 (!) minutes to boot when PCIe SATA card is plugged in

I've purchased a PCIe 4-port SATA card (model SA3004) on Amazon because I ran out of ports on a computer I'm using as a server (HP EliteDesk 800 G2, only has 3 ports OOTB). Currently, one drive is ...
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Confusion: What's the difference between SATA, NVMe, M.2, and PCIe?

What's the difference between SATA, mSATA, eSATA, SATA Express, SATA III, NVMe, M.2, and PCIe? I have looked for the answer, and while many website explain the difference between some of these terms, ...
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Interference between graphics card and wireless adapter

I have a workstation (HP Z600) with a graphics card (NVidia Quadro FX 3800) that has a DVI connector and two displayport connectors, as well as a Qualcomm Atheros AR93xx Wireless Network Adapter. ...
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Can I recover an NVME M.2 PCIe drive that shows 0 bytes available?

I have an MSI B150 PC Mate MB that I used an M.2 adapter to install a NVME M.2 drive in the PCIex16 slot. Worked great, installed Windows, booted several times. Then I plugged in the old Sata HDD (had ...
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Is it safe to put a 8-lane PCI Express 3.0 card into a 16-lane PCI Express 2.0 slot?

Title says it. I have a Dell Perc H330 and would like to put it into a mainboard that has a PCI-express 2.0 16x slot. Is this compatible?
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Can I use the mac ssd on a another laptop?

Looks like apple mbp 2015 uses pci express ssd. Let's say I update my mbp with newer ssd. Can I use to old mbp ssd on another windows laptop (i.e. lenovo) with a sata conector? Is there any adapter ...
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HP Notebook (F387wm); Internal PCIe slots & internal USB ports..?

Wasssup folks! I've been on and off this forum for a short time and find some good info here! I'll make this brief.. I cannot take my laptop apart (I'm in motel with 3 small kids and they hover like ...
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Understanding output of `lspci -nm`

I'm trying to understand the columns in an lspci line output: <pci_device_id> <?> <??> <???> <????> <?????> <??????> Example output: $ lspci -nm | grep d7:...
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What component or piece of software decides when PCI Express lane sharing occurs?

According to the specifications of an AM4-compatible motherboard, there are two PCI Express x16 slots. If only one of the x16 slots is populated it will communicate using all 16 lanes. If both x16 ...
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Change by software the PCIe bandwidth from 16x to 8x

How can I change by software the bandwidth of a PCIe GPU from 16x to 8x ? I use an Asus Hero XI and Windows 10 Enterprise, and a 2080ti. I could not find anything in the BIOS or in Windows GP or ...
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How to resolve the issue when Windows 10 Pro OS, pre-installed in my BMAX B1 Mini PC, does not detect M.2 2280 M Key SSD in it?

My new BMAX B1 Mini PC, with pre-installed Microsoft Windows 10 Pro, has a M.2 2280 SSD with M Key Slot in it. Accordingly, I have purchased and inserted a 256GB Transcend M.2  2280  NVMe PCIe Gen3 ...
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Is it possible to get PCIe bus/device/function numbers on the PCIe endpoint device by itself?

I'm using a PCIe EP device which is based on the Synopsys PCIe EP IP, and running Linux on it. When connecting to a Linux host, on the host I can get the bus/device/function numbers from lspci and ...
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GPU to Thunderbolt 3 Using AIC and Riser

I got a weird/crazy one here, I want an eGPU for my laptop, the enclosures are all overkill for any GPU I would use (AMD Radeon Pro WX5100). So, I found this AIC then found a female to female GPU ...
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Why KingSpec ne-120GB is much slower than it sould be

I've added the KingSpec NVME 120GB card to my computer, using PCI-E single-lane adapter. According to the statement of the seller, this card's speed should be: sustained read speed of 1500MB/s ...
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GPU struggles only in the primary PCIe slot. Is this a motherboard issue?

When my GPU is in the primary PCIe slot, I sometimes get loads of garbled sound when I run the audio through the HDMI. The GPU also performs far worse on benchmarks. In the primary slot I get 30 ...
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Unable to image drive in new laptop

This is likely to be a hardware support issue but I'm looking for any pointers that may help out. I've just got a new Dell Inspiron 13 7000 2-in-1 (7391) and I'm trying to image the drive to an ...
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What does PCIe Gen3x4 means

I've performed some google search but could not found any answer to this term: PCIe Gen3x4. Could someone help me? Does that means it uses PCIe 3.0 with 4 lanes?
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Need at least 6 PCIe x8 or x16 slots - am I effectively barred from using an AMD desktop platform?

Note: This isn't a "hardware request" question., I've looked at the market and concluded what I want doesn't exist. That's just how it is. My question is, is there any way technically to work around ...
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Message-Signaled Interrupts (MSI) vs INT on PCI-E GPUs

I've got a few questions about PCI-Express interrupts, because there are some misconceptions on the web regarding them. Specifically, I'm interested about PCI-E GPUs and interrupts. What others on ...
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PCIe Wi-Fi adapter works slowly in PCIe 2.0 x16 (x4 mode)

I have ASUS Z97M-PLUS motherboard with four PCI ports: 1 x PCIe 3.0/2.0 x16 (x16 mode) 1 x PCIe 2.0 x16 (x4 mode) 2 x PCI And two PCIe devices: Graphics Card and Wi-Fi adapter TP-Link TL-WN881ND ...
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1x16 to 4x4 PCIe using a passive riser

Can a single 16x slot be divided between 4, 4x cards with each having 4 dedicated lanes? I haven't been able to find a riser that does this which is making me think it's not possible with PCIe.
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Will an express card|34 to PCIe x16 work?

My laptop has an ExpressCard|54 (it will fit ExpressCard|34 as well) and I want to add a discrete GPU, the AMD Radeon RX 580 8GB. Will the ExpressCard|34 to PCIe x16 adaptor work?
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Erratic WiFi connection with PCI card

I have a computer with a TP-Link wireless N PCI Express adapter (model TL-WN881ND) that's having trouble maintaining a WiFi connection to my residential gateway. Every few minutes, I have the ...
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What exactly is a “PCI Express card slot (physical link width x16; negotiable link width x4, x1)”?

From the manual of the Lenovo M93p (http://content.etilize.com/User-Manual/1029184064.pdf): The motherboard has 3 PCI Express slots: a "PCI Express x16 graphics card slot" a "PCI Express x1 card ...
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What limits how much of the memory a PCIe device can address?

Some PCIe devices cannot read more than 4 GB of address space without an additional driver or modified driver. In such cases, what limits how much memory they can read? Is it the memory controller? Is ...
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Can I insert an M.2 SSD with PCI-Express 3.0 x4 to a PCI-Express 2.0

My motherboard is Asus Z97-PRO GAMER, and the Asus website says: Z97-PRO GAMER includes an M.2 socket with two native PCI Express 2.0 lanes for data-transfer speeds of up to 10 Gbit/s. This is the ...
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Can PCIe bifurcation be dangerous?

If I set the PCIe slot bifurcation to x4x4x4x4 and connect a x16 GPU to it, could this possibly damage the GPU? I understand it won't work, but I'm wondering if it could cause any permanent damage. ...
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Bottleneck - PCIe gen 3 x1 device on PCIe gen2 x2 slot

Is there a bottleneck between a device with PCIe gen 3 x1 connection if connected to a PCIe gen2 x2 slot?
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How are the CPU-chipset lanes shared on X570 motherboards?

The basic question is: If there are four PCIe lanes between the CPU and chipset on an X570 motherboard, then how can everything connected to the many chipset lanes be on equal footing with the direct ...
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Non-storage device in M.2 M-Key port not working, how to debug?

I've got an 51nb X210 Thinkpad with an M-keyed M.2 slot. My ultimate goal is to add a Thunderbolt 3 port via the GC-Titan Ridge card, but for now I want to start with a USB-C port. To that end, I got ...

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