[ Nvidia SLI weird problem ] Very challenging problem, None of the expert people i know could fix it - Help Needed.

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Atiff Chaker

Atiff Chaker

Honorable
Aug 25, 2013
8
0
10,510

Hello Everyone .

My problem started 2 weeks ago when suddenly my 2x GTX 660 SLI stopped working ( All games instantly crashing after i open it ) While everything is fine on a single card - I thought it's Nvidia beta driver 326.80 that cause the error , So i re-installed the stable driver again 314.22 , Same thing happened , Installed a fresh copy of windows 7 & tried with the stable driver again 314.22 ( It used to work smooth with those drivers before ) , The problem still exist .

I installed all needed programs again and updated windows and problem still there , so I kept trying to solve the problem with these ways ( as people suggested ).

- Reset my motherboard
- Tried all Nvidia drivers with driver cleaner pro
- Tried single card only and both cards are working fine
- Replaced the SLI bridge with a new one
- Tried to change some settings in my MB and Nvidia control panel
- Tried to update both cards bios and i found that both cards are running with the latest bios and both of them having same settings and values - So i didn't flash them.


- Could it be the PSU ? But it was working fine 2 weeks ago & Everyone said PSU is fine.

This problem is killing me slowly , I'm out of ideas and i gave up thinking ,I am willing to pay money even to get this fixed , so one of my friends suggested to open a topic here , I will appreciate your help guys not only with thanks in the forum , for the one who will fix this .


Anyway , This is my computer setup ..

i7-3770K
h 80 cooler
2x Gtx 660 sli
couger 650 w PSU
ASUS MAXIMUS V FORMULA
16 GB ram
2x intel SSD 250gb
samsung 27 3d
.
.
 
Solution
17seconds
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bystander

Champion
Dec 9, 2009
15,141
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I had a similar problem recently, and it was my PSU. Even though I had a 850W Antec 80+ bronze PSU. It went bad, and caused crashes. Both cards worked on their own, and both worked in either PCIe slot (make sure you tested each PCIe slot on their own).

It is possible the motherboard went bad if the cards won't work alone in the 2nd PCIe slot.
 
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Atiff Chaker

Atiff Chaker

Honorable
Aug 25, 2013
8
0
10,510


i've tried to overclock both cards before with afterburner and oc guru but it was crashing with tests even if i increase gpu clock with 10 only , one of my friends told me that your 660 s are OC version and they are already overclocked , however at that time everything was running smooth and i was busy gaming .
 
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Atiff Chaker

Atiff Chaker

Honorable
Aug 25, 2013
8
0
10,510


I tested both slots with th other card , everything is cool , The PSU is coming to mind again ( i was in doubt when i bought this couger psu ).
 
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17seconds

17seconds

Champion
Jul 27, 2010
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51,965
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Solution
Atiff Chaker

Atiff Chaker

Honorable
Aug 25, 2013
8
0
10,510


i don't have this option , also have to drive 8 hours if i am getting new one.
 
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Atiff Chaker

Atiff Chaker

Honorable
Aug 25, 2013
8
0
10,510



Thanks 17seconds for replying me i really appreciate it, Well i am going with your suggestion & will buy a new PSU , any suggestions ?
 
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17seconds

17seconds

Champion
Jul 27, 2010
10,584
4
51,965
You were asking too much from a low-quality PSU. Overclocking can dramatically increase power usage and stress out your power supply.

Go for the tried and true Corsair and Seasonic units and go for 750 watts to give you some overhead and to allow you the ability to upgrade to SLI'ed 760s/770s in the future, which require 750 watts minimum. Bystander seems to like Antec, so that would be one to consider as well.
 
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