So I've been trying to set up 2-way SLI on my system but the option doesn't show up in the NVIDIA control panel. This is my setup:
MB: GA-Z77X-UD5H http://www.gigabyte.com.au/products/product-page.aspx?pid=4139#ov
GPUs: 2 x Gigabyte GTX 670 4gb OC http://www.gigabyte.com.au/products/product-page.aspx?pid=4375#ov
CPU: i7 3770k (Ivy Bridge) http://ark.intel.com/products/65523/Intel-Core-i7-3770K-Processor-8M-Cache-up-to-3_90-GHz?q=3770k
Windows: 8 64bit
Note: With the Ivy Bridge platform and Z77 chipset, my motherboard's expansion slots run at: x16 or x8/x8 or x8/x4/x4 (all PCIe 3.0)
So when I'm using x8/x8, SLI works, but I won't have enough space for my sound card. Therefore I need to plug in one of the graphic cards into the x4 slot.
NVIDIA requires x8 @ PCIe 2.0 minimum. This shouldn't be an issue, since my expansion slots are all capable of running at PCIe 3.0 (and x4 @ 3.0 = x8 @ 2.0).
Other people have set up 3-way SLI using the same cpu and mb so it definitely is possible.
Problem: My x8 and x4 slots keep switching between PCIe 1.1 and PCIe 3.0 (I can see this in GPU-Z).
Question: How can I force enable PCIe 3.0 permanently?
Things I've tried:
1. Set expansion slots to PCIe 3.0 in BIOS
2. Set power management mode in NVIDIA control panel - global settings to 'Prefer maximum performance'
3. Set power management mode in NVIDIA control panel - program settings for every application to 'Prefer maximum performance'
4. Turned off 'Link state power management' for PCIe in windows power options
5. Enabled PCIe 3.0 using regedit function (based on this guide: http://forums.evga.com/How-to-enable-PCIE-30-in-Windows-8-and-81-Regular-and-Pro-m2063059.aspx)
6. Enabled PCIe 3.0 using a patch from here: http://www.trickmasterpc.com/force-enable-gen3-pcie-3.html
MB: GA-Z77X-UD5H http://www.gigabyte.com.au/products/product-page.aspx?pid=4139#ov
GPUs: 2 x Gigabyte GTX 670 4gb OC http://www.gigabyte.com.au/products/product-page.aspx?pid=4375#ov
CPU: i7 3770k (Ivy Bridge) http://ark.intel.com/products/65523/Intel-Core-i7-3770K-Processor-8M-Cache-up-to-3_90-GHz?q=3770k
Windows: 8 64bit
Note: With the Ivy Bridge platform and Z77 chipset, my motherboard's expansion slots run at: x16 or x8/x8 or x8/x4/x4 (all PCIe 3.0)
So when I'm using x8/x8, SLI works, but I won't have enough space for my sound card. Therefore I need to plug in one of the graphic cards into the x4 slot.
NVIDIA requires x8 @ PCIe 2.0 minimum. This shouldn't be an issue, since my expansion slots are all capable of running at PCIe 3.0 (and x4 @ 3.0 = x8 @ 2.0).
Other people have set up 3-way SLI using the same cpu and mb so it definitely is possible.
Problem: My x8 and x4 slots keep switching between PCIe 1.1 and PCIe 3.0 (I can see this in GPU-Z).
Question: How can I force enable PCIe 3.0 permanently?
Things I've tried:
1. Set expansion slots to PCIe 3.0 in BIOS
2. Set power management mode in NVIDIA control panel - global settings to 'Prefer maximum performance'
3. Set power management mode in NVIDIA control panel - program settings for every application to 'Prefer maximum performance'
4. Turned off 'Link state power management' for PCIe in windows power options
5. Enabled PCIe 3.0 using regedit function (based on this guide: http://forums.evga.com/How-to-enable-PCIE-30-in-Windows-8-and-81-Regular-and-Pro-m2063059.aspx)
6. Enabled PCIe 3.0 using a patch from here: http://www.trickmasterpc.com/force-enable-gen3-pcie-3.html
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