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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What is a PCI-Express Lane?

I am reading an article bemoaning i7-5820K Will Only Have 28 PCI-Express Lanes compared to its sibling processors having 40 lanes. Isn't 28 lanes already too many? How many lanes would a normal home ...
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Is it possible to connect an external GPU via Ethernet?

I have laptop which has working Ethernet port but I always use WiFi . I am wondering if it is possible to run and use a graphics card (with external power supply) connected to the Ethernet port (with ...
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What are these “notches” on the side of the PCI Express connector?

I was tinkering with my PC yesterday and now I'm wondering about these things. Not that it really matters to me, I'm just curious. Example below:
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What is PeSATA?

For my computer I am thinking to purchase one of these, which needs two SATA connectors, but I am concerned about not having enough SATA connections on my motherboard (I already have two HDDs and an ...
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Does a x4 PCIe mechanical work in a x16 slot in x4 mode?

My question is fairly simple. Can a x4 physical (mechanical component) fit in a x16 PCIe, which is at x4 mode?
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Why aren't there PCIe RAM expansions?

Perhaps I may be overlooking some aspect that is an important cause as to why these don't exist, but I feel that having RAM expansions through PCIe would be perfectly feasible. I know that a lot of ...
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Can I be 100% certain that a PCIe x4 card will fit in a PCIe x16 slot? [duplicate]

Possible Duplicate: Does a x4 PCIe mechanical work in a x16 slot in x4 mode? I know I can place a smaller card in a larger slot. But can I be 100% certain that it works? (if we ignore a broken ...
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Adding a SATA 6 Gbit/s PCI Express controller card?

If I add a SATA 6 Gbit/s PCI Express card to my motherboard, will I get similar speed to native SATA ports built into the motherboard? I ask because I have a SATA 6 Gbit/s SSD and my motherboard ...
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How to tell if an empty PCI Express slot is 1.0, 2.0 etc? (general test, or enquiry command, not refer to spec)

Is it possible to run a test on an empty PCI Express slot to definitively determine that the slot is PCI Express 2.0 or not? My reason for asking is to see if I get the most out of USB3.0 with my ...
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Is it possible to power off a PCIe video card/slot? (eg. hot-plug)

I'm looking at building a system that supports VT-d so I can pass through a high powered loud video card to a Xen/KVM/whatever VM (host will be Linux based). However, when I'm not using the VM I want ...
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What are PCI and PCI Express slots used for?

I'm comparing different Micro-ATX motherboards for a home server build and I was wondering what I would use PCI and PCI Express slots for? Are these used for hard-drives, GPUs, RAID controllers, RAM ...
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5 x 3GB drives and 4 x 1500GB drive best raid setup?

I am building a file server my plan is the have the Operating system on one raid partition and the data storage on another partition. I currently have 5 x 3GB IDE drives that i would like to put the ...
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Can I use a pci-e x16 slot for multple cards?

I have a mini itx pc with only one pci-e x16 slot. There is another old style pci slot. I don't care that much about graphics bandwidth and I'd like to add USB 3.0 support. It's a waste to be using ...
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1answer
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Do PCI / PCIe buses and devices always enumerate in the same order?

I am looking into a situation where there are multiple, identical (National Instruments) PCIe DAQ modules in a PCI/PCIe chassis, connected via either a single or dual chassis controller. In the worst ...
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PCIe x1 serial card suddenly stops working

The Perpetrating PC... MB:MSI Z77A-GD65 OS:Windows 7 Pro CPU:Intel Core i5-3570k Ivy Bridge Memory:16gig G.Skill Ripjaw PSU:Cooler Master Silent Pro 700w HD:1TB WD Cavier black Rosewill rc-300e ...
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If I have 2 Video cards in the same computer without SLI or Crossfire will it boost performance at all?

I have this motherboard with 2 PCI-E Graphics cards, apparently only one of them is actually x16 what ever that means. http://www.gigabyte.com/products/product-page.aspx?pid=2625#ov If I put the ...
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Does PCIe 3.0 x8 provide enough bandwidth for a dual QSFP 40Gbit NIC?

I'm researching dual QSFP 40GBit network cards for a work project and have a few questions regarding PCIe 3.0's theoretical max bandwidth. I'm currently looking at a dual QSFP PCIe 3.0 x8 card on CDW ...
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Will a regular PCI Express card work in a “PCI Express x16 Graphics (PEG)” slot?

I have a Shuttle SG31G2 that has an Intel G31/ICH7 chipset, one PCI slot, and one 16x PCI Express slot. I want to add a better gigabit NIC to it, and the PCI slot is already in use by a SATA card. ...
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Will a PCI-E V2.0 Graphics Card work with a PCI-E V1.0 Motherboard?

If I buy a PCI-E v2.0 graphics card (Nvidia Geforce GTX 275) will it work correctly and to the full potential with my PCI-E v1.0 motherboard (Asus P5B-Deluxe) ?
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How to check whether my PC supports PCI Express

I'm trying to figure out whether my system supports PCI Express without opening up the box. lspci doesn't mention "Express" or "PCI-e" anywhere, but dmesg reports that a "PCI Express Hot Plug ...
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A PCI Express 3.0 Video Card into a PCI-E 1.0 x16 slot

Perhaps I'm trying to push my mobo too hard, but I think I have read that PCI-e 3.0 is back compatible to previous PCI-e specifications. But 3.0 into a 1.0, is it possibly asking too much? I'm ...
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Why can't PCIe devices share lanes?

On older chip-sets it was not possible to have a dedicated graphics card in the PEG slot and have the Integrated Graphics Device (IGD) enabled at the same time. After looking online I found this was ...
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1answer
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How do you test if a PCI slot is working - motherboard diagnostic software?

I suspect that my motherboard is bad, and that my PCI-E slot is not working. I have a Gigabyte motherboard that had a Hauppage 2250 working fine in the PCI-E slot for many months. However - ...
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Is a PCIE X1 card for USB 3.0 worth it?

I have a portable HDD on USB 3.0, and soon I'll have a 32gb flash drive on USB 3.0 as well. My motherboard is pretty old - and the next time I'll upgrade it is when I get a new CPU/mobo/ram. Slots ...
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How can I differentiate between the unmarked PCIE slots on my motherboard?

The motherboard in question is the ASUS P5MT-M Micro ATX The following image shows a couple sections of information taken from the official ASUS manual for this motherboard, along with an image of ...
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Can I turn a PCI-e x1 slot into an old PCI slot?

Is it possible to convert a PCI-e x1 slot into an old PCI slot? If so, how?
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Determine PCIe device NUMA node

Assuming fairly recent Linux OS, is there an easy way to determine to which NUMA node the PCIe slot, where a device is plugged in, belongs?
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Physical obstacle plugging PCIe 4x into PCIe 8x

I know this has been already discussed, for example in this question, where there's even a wikipeida quote saying that it's possible. So, according to that, I bought that PCIe 4x card. I have two ...
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How many types of PCIe graphics card form factor?

How many types of sizes are there for the form factor of graphics card? I am refering to the L-shaped metal part that juts out from the casing, allowing external connection to the monitor. I have a ...
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Where does PCI-E link-width negotiation occur?

I'm trying to diagnose an underperforming PCI-E card in my system, and I've realized that it's negotiating the wrong link-width. Specifically, from running lspci -vv, I see: LnkCap: Port #1, Speed ...
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Put Graphics card with PCI Express 2.0 into PCI Express x1 slot

I have old HP PC. Model: HP Compaq dc5700 Microtower http://h10010.www1.hp.com/wwpc/ca/en/sm/WF06b/12132708-12132884-12132884-12132884-12736054-12736270-80746314.html?dnr=1 It has PCI Express x1 ...
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My PCIe video card does not work in POST, only comes on when Windows loads

I have an ASUS Maximus V Extreme motherboard which has onboard video. There is an Asus GeForce GTX 670 in PCIe slot 1. In the BIOS, I have PCIe selected as the preferred GPU. I've tried disabling ...
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Searching for a PCI standalone System [closed]

For a research project, I would like to have a PCI(e) card which is a full standalone system (own CPU, memory, sata bus, network interface, etc..) running Linux, but which can be deployed on another ...
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Will my old pci express v2 video card (evga 8800 gt) work in a mobo with a pci express v3 slot?

I'm looking to get a new motherboard. I know that if the graphics card has a higher PCI version than the slot, it should work. But what about the other way around, where the slot has a higher version ...
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If I combine a PCIe x16 graphics card and a PCIe x4 hardware RAID, does the graphics card get 16 lanes?

I'm planning to install a graphics card which can utilise 16 PCIe lanes and a RAID controller which supports PCIe x4. The Ivy Bridge CPUs are all specified as supporting either one x16 or two x8 ...
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Positioning triple slot graphics cards

If there are two gtx 570 dc ii's: On a Gigabyte z68x-ud7-b3 motherboard, in slots PCIe16_1 and PCIe8_2: Will the headers for front panel connections be blocked, or will there be enough flex in ...
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What is the “known hardware incompatibility” that disables PCIe Active State Power Management? How do I fix it?

I'm on Windows 7. I just ran a Power Efficiency Diagnostics Report through powercfg -energy and I got this error: Platform Power Management Capabilities:PCI Express Active-State Power Management (...
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PCI Express - Clarification about BAR, Memory addressing and physical memory

I'm an absolute beginner starting to understand the PCI Express protocol and I need some clarifications about its mechanics. I understood that a PCI Express endpoint device may have some memory BAR ...
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How do home computer buses electrically put data on the wire?

In particular I'd like to know what schemes PCI Express, PCI and ISA use at the physical layer.
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How to set up multiple video cards in Windows XP

All I am trying to do is run a three monitor setup, two widescreens on the good card at high res and a third smaller monitor at 1024x768 that I watch continuously updating info in. I have a Dell ...
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How do I get to know the PCIe version on my Motherboard?

The motherboard doesn't have anything written. Are there any alternative methods to find which version of PCI-Express my slot supports? I am looking for an upgrade and I want to add a PCIE gfx card
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x16/x16 vs x8/x8

I am considering purchasing an LGA1155 board but dual GPUs they only run at x8/x8. From my research it seems that you lose about 1-3% tops when running at 2500*1600 but a lot more when running games ...
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How much electricity will I save if I use the onboard graphics card [closed]

If I use onboard video instead of a PCI-E card, will I save much money in the electricity bill?
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Why do some serial interfaces have many pins?

Various hardware connectors that are dubbed "serial", e.g. USB and PCI-express, have many more than 2 pins/wires. In fact even the good old "serial port" has them. But since they are serial, not ...
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What are the performance differences between PCI-Express x16 and x4

I have two PCI-Express x16 slots on my motherboard, but one of them only has x4 bandwidth. For passing through my graphics card to a virtual machine I need to use both slots and unfortunately, the ...
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Can I use a mini PCI-E card in a standard motherboard with PCI/PCI Express slots?

I'm helping someone build a computer and they absolutely insist on having an internal Bluetooth adapter. I've been searching around for a PCI-E/PCI based Bluetooth adapter but I've had no luck ...
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PCI vs. PCIe wireless network card

I currently have a PCI 802.11n wireless network card (TP-LINK TL-WN951N 300M). Would a PCIe network card improve 1. download speed and/or 2. range (i.e. the bars that windows shows when talking about ...
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Building a new PC - PCI-E lanes and how do they work

I'm looking to build a new gaming PC that will last a while. I want to use a PCI-E x8 SSD + GTX 780 SLI in this build. Now i'm looking around on the web to see what i need to support this in terms of ...
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ThinkCentre M71e PCIe network card not showing up

I bought a ThinkCentre M71e (3134-C4U) with the intention of using it connected to several separate physical networks. I bought a PCIe Network card (SuperMicro AOC-SG-I2) with two additional network ...
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PCIe SSD as main (boot) hard drive on AsRock X97 Extreme M4

Recently, I assembled a new computer for personal use. With a top-notch CPU and video card installed, and reasonably fast RAM, the hard disk is now the main bottleneck in the system. The 3TB seagate ...