PCie 3.0 vs PCIe 1.1

[Guest Ximi]

There are difference notable on pcie 3.0 vs 1.1

I have this problem with SLI MSI 2080 Ti

The setup :

Rampage V Extreme

6950X

G.Skill 3200 Mhz

All setings on Gen 3 pcie , power saving disabled , etc ...

What can I do ?

Regards !

[Guest Ximi]

Help , please !

Slot 1 and  slot 3 video cards !

[Bruno]

Try to disable, in BIOS, everything that competes for PCIE lanes/IRQs: net cards, audio, USB controllers.

Try to connect the extra power for PCI-E on the motherboard.

Edited October 6, 2020 by Bruno

[Guest Ximi]

I configure Gen3 PCIe , desactivated Audio HD , Ethernet.

24 pins conected from Enermax 1500 , 8 pins for CPU.

Extra power , where ? do you gave a pic ?

At the moment its variable on 3.0 and 1,1 the Slots PCIe.

The score with SLI on 3D 11 its P35.xx , with one arrives to P40.xxx

[Bruno]

On the lower edge of the board, there is a 4-pin MOLEX connector. That is for PCIE extra power.

You can also check in BIOS the cards PCIE status. Check if there is the same status between BIOS and Windows.

[Guest Ximi]

Thanks !

[Guest Ximi]

On 10/7/2020 at 7:35 AM, Bruno said:

On the lower edge of the board, there is a 4-pin MOLEX connector. That is for PCIE extra power.

You can also check in BIOS the cards PCIE status. Check if there is the same status between BIOS and Windows.

That not is the problem.

Always work with all pluged , 1200 W and 1500 W for SLI and 6950X.

I think the problem are on OS win 7 , Win 10 or last drivers and software MSI AB.

[Guest Ximi]

On 10/7/2020 at 7:35 AM, Bruno said:

On the lower edge of the board, there is a 4-pin MOLEX connector. That is for PCIE extra power.

You can also check in BIOS the cards PCIE status. Check if there is the same status between BIOS and Windows.

What side ? The Bios chips ?

Front to PCIe side ? There is one molex 4 pins there.

[Guest Ximi]

Hello Bruno ....

With one : https://hwbot.org/submission/4575124_ximi_3dmark11___extreme_geforce_rtx_2080_ti_19824_marks?recalculate=true

[Bruno]

10 hours ago, Joakim10 said:

What side ? The Bios chips ?

Front to PCIe side ? There is one molex 4 pins there.

It is under the last PCIE slot.

[Guest Ximi]

Yes , I put it on well , Thanks !

[Guest Ximi]

I put it on it , but the pcie is : pcie 3.0 / pcie 1.1 on GPU-Z ASUS.

If you want capture or pic , not problem.

[Bruno]

Try other BIOS versions for the motherboard.

[Guest Ximi]

Solution : Adjust best options on panel control of nvidia

[Bruno]

Can you be more specific?

[Guest Ximi]

Selection 2k resolution.

Maximum rendiment prefered. Up the clocks from SLI. Render with GPU-Z.

[Guest Ximi]

https://www.3dmark.com/spy/14797567