Well as the title suggests, I'm having difficulties enabling SLI with my shiny new 670. I've actually done SLI on my Mobo before, and with another pair of 670 4gbs. I've re-installed the multiple drivers multiple times, tried switching the cards around in the PCI lanes, tried it with different SLI bridges, re-installing Windows, but so far nothing has worked. Both of the cards are detected by windows, in GPU-Z, in Precision-X, and both have been tested individually for stability. They are on the default bios with no overclocks (yet), and I've honestly run out of ideas. Rig is:
2x Galaxy 670 4gb
3570k @ 4.7 1.39v
Gigabyte Z77 UD5H
bequiet! Darkpower Pro 850w
gSkill 2133 8gb ram
NZXT Switch 810
Mushkin 120gb SSD
Edit: When I open up the control panel, under the tab I know it should be, "Configure SLI, Surround, PhysX" it just reads "Configure Surround, PhysX", completely skipping the option of SLI. It isn't mentioned anywhere in the panel.
SLI can be very tricky - anytime that I've moved my cards, such as when I clean the PC, then I have a hard time getting SLI to work again. I've found I have to be very deliberate and careful. Put one card in, make sure it's in good, then the 2nd, and then add the SLI bridge paying careful attention to making sure it has a good connection. Usually after a couple of times of doing that I'm able to get SLI going again. I've never had any issues with the cards being on slightly different settings, as long as they are the same card; same memory, etc.
I've done that. Sommething I forgot to mention that may very well be important: every time I add or take out a card, the first time I boot up the mobo gives me error code 62, "Installation of the PCH runtime services". After forcing it off with the power button, it boots up as normal. Is this behavior something normal, or should it boot up the first time just fine? Would clearing my CMOS be of any help? I'm trying as much as I can before I come to the inevitable re-install of Windows, and I really don't have time for that at the moment.
From what I'm reading on the PCH error code. it has to do with a BOOT SKIP issue. where basically when you first cut the computer on it skips post and its not set to skip post in BIOS I'm kinda unsure what to tell you to do here.. except make sure connections are tightly plugged in and no loose ends
Just got it working.... I had my wifi card in the bottom pci x16 slot, and this was hogging up all of the bandwidth for the second card, not letting go into SLI. I had tested it with the wificard out, but hadn't re-installed the drivers with it the open slot free. I now have the wifi card sandwiched between the two, although it isn't impeding airflow.
good, yea didn't know you had other devices plugged in. But with a Ivy bridge Processor. You should have had Plenty of bandwidth with Pci express 3.0. unless you plugged the 2nd 670 into a PCI e Gen 2.0