x99 oc formula link band width question

[OnDborder]

I'm running 290's crossfired with a 5960x cpu.
My pcie band widths are reading one at x16 and one at x8.
It seems that slot one in running x8
1 vcard in slot 1 and the other in slot 4
I thought they were supposed to be x16??
Is this correct?

[harleyman]

Re: x99 oc formula link band width question

I'm running 290's crossfired with a 5960x cpu.
My pcie band widths are reading one at x16 and one at x8.
It seems that slot one in running x8
1 vcard in slot 1 and the other in slot 4
I thought they were supposed to be x16??
Is this correct?

Depends on the board.. What do their specs say they run at ?

[OnDborder]

Re: x99 oc formula link band width question

Asrock OC formula x99

Asrock x99oc 5960x..........Asrock z77 x6/3770
GSkills 16gb........................16gigZ Corsair
Gigabyte 290s crossfire ...........HIS 280x crossfired
X-Fi titanium Fatal pro.................H2O cooling
480 crucial/480 samsung..... .......240gig ssd
Siverstone 1500wt'r.....................Corsair1000HX

[harleyman]

Re: x99 oc formula link band width question

?

[parsec]

Re: x99 oc formula link band width question

I'm running 290's crossfired with a 5960x cpu.
My pcie band widths are reading one at x16 and one at x8.
It seems that slot one in running x8
1 vcard in slot 1 and the other in slot 4
I thought they were supposed to be x16??
Is this correct?

The number of lanes available for each slot depends on the X99 board and the Haswell E CPU. Since you have an i7-5960X with 40 PCIe 3.0 lanes, the CPU is not a limitation.

From the specs for your board:



A video card in the PCIE1 and PCIE4 slots should be x16 for both cards. What is showing PCIE1 is running at x8? That might be a power saving option kicking in on the card in the PCIE1 slot.

What BIOS version are you using? Version 1.40 includes a "PCIE card" compatibility update.

ASRock > X99 OC Formula