Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Question on PCI-E Slots

3 Weeks Ago   #1

Windows 7 Ultimate x64
Question on PCI-E Slots

I haven't had to use an expansion slot, since back when PCI slots were around (that long ago).

I am trying to figure out about PCI-E slots. I have a 2011 motherboard (Gigabyte 890FXA-UD5 Rev 3.0). It supports PCI-E standard 2.0.

What I want to know is, and I am a bit confused about. If I buy something like a USB 3.0 expansion card, that provides additional USB 3.0 slots for my computer and requires a PCI-E slot. Can I plug this into a PCI Express x16 slot? Or are those just for graphic cards? Also the expansion card has a connector that is the size of PCI Express x1 slot. I want to know even if the connector is small enough for a PCI Express x1 slot, if I can plug it into a PCI Express x16 slot? I thought I read somewhere that this would work, but I want to double check first.

So my questions are (but please read the above before answering):

1) Are PCI Express x16 slots only for graphic cards?

2) Can you plug an expansion card that has a connector the size of a PCI Express x1 slot into a PCI Express X16 slot? From what I can tell, it will fit, but I want to know if it will work, and I read somewhere else that you could do this, but I want to make sure and double check that what I read was correct before I try.

My System SpecsSystem Spec
3 Weeks Ago   #2

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64

1) Are PCI Express x16 slots only for graphic cards?

2) Can you plug an expansion card that has a connector the size of a PCI Express x1 slot into a PCI Express X16

Thinking of something like this?

You might not need to use the pcie x16 slot, depending on what else you have got on your board.
According to the specs, you have several

  1. 2 x PCI Express x16 slots, running at x16 (PCIEX16_1, PCIEX16_2) (Note 2)
  2. 1 x PCI Express x16 slots, running at x8 (PCIEX8) (Note 3)
  3. 1 x PCI Express x16 slots, running at x4 (PCIEX4)
  4. 2 x PCI Express x1 slot (All PCI Express slots conform to PCI Express 2.0 Standard.)
  5. 1 x PCI slot

(Note 2) For optimum performance, if only one PCI Express graphics card is to be installed, be sure to install it in the PCIEX16_1 slot; if you are installing two graphics cards, it is recommended that you install them in the PCIEX16_1 and PCIEX16_2 slots.
(Note 3) The PCIEX8 slot shares bandwidth with the PCIEX16_1 slot. When PCIEX8 is populated with a PCI Express graphics card, the PCIEX16_1 slot will operate at up to x8 mode.

Why not use one of the 2 x PCI Express x1 slots?

Looking at the specs, you have plenty of sata3 , but no internal connector for usb3, so a card might be cost effective.
GA-890FXA-UD5 (rev. 3.0) | Motherboard - GIGABYTE Global
My System SpecsSystem Spec
3 Weeks Ago   #3

Windows 7 x64, Vista x64, 8.1 smartphone

2) Yes, it will work as a PCIe x1 device, and the unused PCIe lanes will be ignored by the controller.

1) Some x16 slots are dedicated for graphics and SLI/Crossfire configurations. This just means that your computer will get better performance from installing graphics card(s) in these slots.
My System SpecsSystem Spec

3 Weeks Ago   #4

Windows 7 Ultimate x64

I have a Nvidia GTX 580 graphics card, that I originally bought at full price. Since then I been on disability, and haven't been able to replace it. The graphics card takes up 2 slots, so it blocks atleast one of the x1 slots, if not both. I have to check. That is why I was wondering about the x16 slots. Also I can still run, even most modern games, atleast the ones I enjoy playing (like strategy games and RPG games) at decent graphics settings.

I thought you could plug a x1 PCIE device into a X16 slot, but just wanted to be sure before buying one and trying, so that is why I posted this thread. This motherboard had so many ports on it, even though it is old age, it even had a couple of USB 3.0 ports and e-SATA ports. So didn't really need to use a PCIE slot, until recently when I am adding a lot more USB 3.0 devices to my computer. And yeah I tried a USB 3.0 hub, but I have had random disconnects if I stick too many devices on it, or bandwidth problems with multiple hard drives. So wanted to add a PCIE card to expand my old computer to get some more life out of it.
My System SpecsSystem Spec

 Question on PCI-E Slots

Thread Tools

Similar help and support threads
Thread Forum
RAM slots
I don't know if this is right. Slot 2 and 4? Shouldn't it be slot 1 and 3?
Hardware & Devices
Question about adding RAM, filling all slots?
I have a Dell Inspiron 570 desktop, with 4 1GB sticks. I want to upgrade to 8 GB, and crucial tells me to get "11321Crucial Ballistix Sport 2GB DDR3-1600 UDIMM". Do I have to fill all 4 slots, or can I just get 1 8GB stick, or 2 4 GB sticks? Thank you.
Hardware & Devices
RAM slots
Hi, Is there any impact on the performance of a laptop under the following scenarios: 1) 6GB of toal RAM - 2GB in one slot and 4GB in another slot OR 2) 8GB of toal RAM - 4GB in one slot and 4GB in another slot. (ofcourse 8GB is larger than 6GB ........... but ......... I cannot...
Hardware & Devices
What slots are these?
My brother brought home a computer that his college was going to trash, and there's no model printed anywhere on it. What slots are those available?
Hardware & Devices
How can you tell if your RAM slots are bad?
I've come to a conclusion that I think my RAM slots are bad,as my computer keeps crashing and i've run out of other ideas..
Performance & Maintenance

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 03:21.
Twitter Facebook