Official GIGABYTE Forum
Questions about GIGABYTE products => Motherboards with Intel processors => Topic started by: ShiddyMota on September 14, 2010, 03:50:13 pm
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Ok Folks, ran into a strange issue that could use some ideas on:
have a raid controller that i installed in the pci-express x8_2 slot because both the 16x slots are taken up by GTX280 cards so its the only available slot i have. Problem is that with the raid controller installed, the vid cards wont display anything. I can unplug the controller and displays fine so i'm speculating that since the x8_2 slot shares bandwidth with the 16x_2 slot that it may be interrupting the gtx280s from displaying video.
Any thoughts on this?
Thx,
Randy G.
system:
i7 930
6 gigs kingston hyperx 2ghz memory
2-gtx 280s(sli)
2-64 gig imation ssds.
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The only reason I can think of is the available bandwidth of the PCIE bus being exceeded. Doesn't help much anyway even if I am right as there is not many options.
Actually what PSU are you running?
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From the Specifications:
(Note 3)
The PCIEX8_1 and PCIEX8_2 slots share bandwidth with the PCIEX16_1 and PCIEX16_2 slots respectively. When PCIEX8_1 is populated with an expansion card, the PCIEX16_1 slot will operate at up to x8 mode; when PCIEX8_2 is populated with an expansion card, the PCIEX16_2 slot will operate at up to x8 mode.
You are correct, and I believe if you have a GFX card in PCIEX16_2 you can only use a GFX card in the PCIEX8_2 slot. If no graphics card is in PCIEX16_2, you can use the PCIEX8_2 slot for anything you like.
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Move drives out of the white SATA ports (mainly the Marvell ones) and don't use USB 3 ports then disable “Onboard USB 3.0 Controller” & “GSATA 6_7/IDE Controller”.
This might be enough to get it to work.
Also set “Init Display First” to “PCIE x16-1”
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I have 2 graphics cards in slot pci X16 running in X16 mode and same problem with my GA-X58A-UD5
Only a solution is to plug addon card in PCIe-X1 slot if possible
That is normal limitation
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(Note 3) The PCIEX8_1 and PCIEX8_2 slots share bandwidth with the PCIEX16_1 and PCIEX16_2 slots respectively. When PCIEX8_1 is populated with an expansion card, the PCIEX16_1 slot will operate at up to x8 mode; when PCIEX8_2 is populated with an expansion card, the PCIEX16_2 slot will operate at up to x8 mode.
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Pierre
sorry i havve not see the response bu friend Lsdmeasap !!
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Thx everyone for the helpful info. it is a limitation with the board... now its gonna force me to upgrade this mobo. ;-) damn the limitations!
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possible solution with this
http://www.virtuavia.eu/shop/pcie-2-x-pci-2-x-pcie-expansion-atx-kit.html
(http://img97.imageshack.us/img97/9248/virtuavia.jpg)
(http://img811.imageshack.us/img811/9248/virtuavia.jpg)
use a PCI-e X1 slot
Pierre