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: Does an x1 card in my x16(wired as x4) slot slow down my x16 slot?

27 Apr 2017   #1

Windows 7 Pro x64
Does an x1 card in my x16(wired as x4) slot slow down my x16 slot?

(Dell Optiplex 7010 MiniTower)

I have the following slot configuration:
1. PCIe x16 (with GTX750 in it)
2. PCIe x1 (Unusable: It's covered by the GTX750)
3. PCI (of no use)
4. PCIe x16, wired as x4

If I put a PCIe 1x USB3.0 card into slot #4 above, will it slow down the video card in slot #1?

I've read that if the x16's share the lanes that the PCIe might downwardly negotiate to the slowest card. But it seems like only vague mentions.

My System SpecsSystem Spec
27 Apr 2017   #2

Win7 pro x64

If you had two identical full x16 slots running two video cards in crossfire mode, then in that case then your board would set them at 8x each. But that's not your case.

You have one full x16 slot and it is owned by your cpu, meaning it bypasses your Platform Controller Hub and its lanes are not shared with the other slots so you are good to go. That x16 slot wired as x4 does go through your PCH and does share lanes with the other remaining slots. See pic.

Check the Bus Interface field when using gpu-z, to see your status.

Download TechPowerUp GPU-Z | techPowerUp

Attached Images
Does an x1 card in my x16(wired as x4) slot slow down my x16 slot?-mb330-crm-bd-_w400.jpg 
My System SpecsSystem Spec
27 Apr 2017   #3

Windows 7 Pro x64

WOW! HUGE help! Thanks!
My System SpecsSystem Spec


 Does an x1 card in my x16(wired as x4) slot slow down my x16 slot?

Thread Tools

Similar help and support threads
Thread Forum
USB 3.0 PCIe card in x16 slot?
Hello all, I searched but did not find any threads on a USB 3.0 card. So if I missed one just hit me over the head okay. Now for the question, I see lots of back panel USB 3.0 cards for PCIe slots. But can you plug that card into a PCI-Ex16 slot AND have it work? Or will they only work...
Hardware & Devices
Card not working in first PCI-E slot
Hello everybody. Since sending a motherboard in for rma is both money-sink (need to ship it to them, a replacement unit and to reinstall windows) and an excruciating wait (weeks? months?) I'd like to try absolutely everything I can before I do. Two months ago everything was working fine, then...
Graphic Cards
SD card slot not working.
This is a used Toshiba laptop I got a month ago. The previous owner said he never used the SD card slot. I know why, because it's not working. When I slide any SD card in, the light comes on for 1 second and then comes off. The card is not recognized. Needless to say, I know the cards are good...
Hardware & Devices
How Do I fix a broken SD Card Slot
On my sister's computer which is a Dell Inspiron 560 it has an SD Card Slot. The SD Card Slot stopped working a while ago and I was trying to help her fix it. The drive letter for it is S: and it says please insert a card. The reader itself is lighting up saying that there is a card in there. If i...
Hardware & Devices
Will a dual slot card fit?
Hey, I've finally decided to buy a new graphics card. It wouldn't fit in my current PC case, nor would my current PSU. Therefore I have to buy a new PSU and a new PC case too. I will move pretty much everything except the old PSU and graphics card (GT 320) to the new case. The card I intend to...
Graphic Cards

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 10:34.
Twitter Facebook Google+