"No Signal" after Asus GTX 660 instal

This is a new build.
The system boots fine, OS loads, Monitor Displays OK with on board VGA video.
Ran ASUS Diagnostics/stress test; all components pass.

Installed single Asus GPU GTX 660 (below)
Loaded drivers and GPUTweak.
Connected Monitor to correct I/O on new card.

Upon reboot, Widows splash screen, then black screen with "no signal" message

Tried downloaded drivers from Asus, Nvidia, and Windows device manager; same problem

This is to be an SLI build, so I switched the GPU card with the second card.

GPU installed in PCIe slot 1

Same problem, no signal

Tried the SLI bridge with cards in PCIe slot 1 and 2 , same problem

Bios 2104 is running at default except Ai overclock tuner is set to X.M.P., switching back to "auto" doesn't help.

GPU driver is 314.22WHQL

I started over, reseated the CPU/Fan and a fresh install of the OS, the Asus motherboard CD and the GPU CD

Boots to Windows splash, goes black, "no signal" message

I even tried a different monitor thinking that a refresh rate conflict might be the problem.

Still "no signal"

Also, replaced the power supply, no help
Ran an “out of the case” trial, no help

CMOS and Bios reset numerous times

Please advise

Please help
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System info

ASUS P8Z77-V PRO LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard/n/
S/N: D5M0CS030003
Intel Core i5-3570K Ivy Bridge 3.4GHz (3.8GHz Turbo) LGA 1155 77W Quad-Core Desktop Processor Intel HD Graphics 4000 BX80637I53570K
S/N: 2L341085A2928
G.SKILL Ripjaws X Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900) Desktop Memory Model F3-1866C9D-16GXM
Western Digital HDD 1tb Model # WDBSLA0010HNC-NRSN
S/N: WMC3F0929021
ASUS GTX660-DC2O-2GD5 GeForce GTX 660 2GB 192-Bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card
GPU #1 S/N: DAC0YZ018355 Installed in PCIE 1
GPU #2 S/N: DAC0YZ018500 Installed in PCIE 2
THERMALTAKE PSU Model #TR2 700W UPC #8-4116304564-0
Acer LCD Monitor Model# X193W, Version X193Wbd
S/N: ETLAT0C051815160544017
APEVIA X-Hermes X-HERMES-GN Black/Green Steel ATX Mid Tower Computer Case w/ Side Window
Win 7 Home 64bit
Asus EUFI Bios ver, 2401

 

Hi,

Have you tried booting in "safe mode" ?

You have already disabled the HD 4000 graphics? in bios perhaps

Is there an issue with Asus and Geforce Cards in sli? or their drivers?

Once pc gets beyond the very low res splash screen your pc comes under a heavier power and "data load".
I have had similar issue with incorrect drivers I think was the cause but that was so long ago, sorry cant be of more help

Seems like windows isn't detecting the cards and using just default generic setting to get the splash screen up, when it comes under load or time to get serious about graphics and such fault occurs.

Im not sure about sli stuff do you have to set one card as the primary and make it pci 0 by default? and put the display out through this? If so for your build you might have to try changing the video pcie slots..im not sure in this just pure guess. Im not sure if the master card has to be in a faster pcie slot if this is a factor?

pcie is very kind of similar to old isa slot technology in its core with gpu cards and such with the infamous old voodoo II cards in Windows 98 days, im guestimating along similar lines.

GL:wave

 

Note many graphics cards require an additional 1 (sometimes 2) power connections directly from the PSU. Are you 200% certain all necessary power connections were made?

 

SOLVED Re: "No Signal" after Asus GTX 660 instal

Thanks for all of the suggestions

There was a driver conflict with the onboard video and the Nvidia GTX

I DISABLED, not deleted, the onboard video driver in Device Manager

Then I installed the Nvidia driver.

Now I have a sweet SLI setup running!

CAUTION: Windows Update will download drivers for the onboard video even though it is disabled. DO NOT install them, easily done if you mass apply your updates without checking what each one does

 

I have Windows set to NEVER download any updates. I get a message that updates are available. I then look them over, always ignoring hardware, and install the critical ones and sometimes recommended. On rare occasions, I might install an optional update.

 

You can also tell Windows Update to only tell you about "Windows" updates.

 

I use WinUpdate's Hardware Notification as a good prompt to go visit the Real Vendor's support site.