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Old September 27, 2012, 08:13 AM
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Default what is it, video, powersupply, motherboard, drivers

Hello

So this what the problem is, I was running 3 way sli system with no issue. But after some use it started to get video artifacting when running bf3, the black background was full of blue dots.

I removed one card and ran 2 way sli and there was no more artifacting.

I tried each card alone and the cards work just fine alone.

Now since then after the system being pushed in games, my mouse moves choppy, the video becomes laggy. If the system is off and not used, things seem normal at first startup until gaming again.

I am no longer running sli, just a single card, there is no more issue at all, any of the three no issue.

my system is

i7 950 1366 socket
Gigabyte g1 sniper x58 chipset
Kingston black 12gb 1600 ddr3
Pny 470 GTX
Enermax 1050watt
one WD sata3 1tb
windows 7 pro 64

latest video drivers
video and cpu liquid cooled

Temps never go over 60c on video and 50c on cpu when gaming.
Runnning the ram at 1066 as there is issues at that speed, running at 1333 or 1600 speeds the sound stops working and nic drops connections in games. NIC stops working if left running for a long time.
I have some 12gb g.skill sniper 1600 ddr3 and the samething happens.

Not sure if the powersupply is weak now or if it is the motherboard.

Thankyou for reading, any ideas welcome.
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Old September 27, 2012, 08:35 AM
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With what you're describing (progessively worse failures) I'd look at the power supply first.

I just had a quick look at the review power consumption for the stock 470 compared to the 560ti (354W vice 313W total power and the 470 is listed as being 215W stock) and think you might have been pushing that PSU fairly close to the max. My OC'd i7 920 w/ stock SLI'd 560 ti cards (2) was pegging my UPS @ 650W+ under load so there's a good chance you were hitting awfully close to 900W if your cards were stock and possibly much higher if they were OC'd.
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Old September 27, 2012, 09:03 AM
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That is what I was thinking, too much for the power supply. I ran the video cards stock speeds. I never have any luck with overclocking, things seem to run better at stock speeds for everyday use.
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Old September 27, 2012, 09:16 AM
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How old was the PSU? At one time it was generally accepted that a PSU would degrade over time even under normal use so if we assume 10% / year (seems to me it was something like that) then these big honking PSUs we're using these days will be losing 100W+ / year.

A quality PSU has a lot of overhead these days, but when you think of it, if that 10% figure is still accurate then after two or three years we're asking our PSUs to do an awful lot of work, especially if they're spec'd close to max in the first place.
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Old September 27, 2012, 11:04 AM
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Since it was getting worse over time I would say not anything software(driver) related. And the gpu work separately, so it's not them. That leaves motherboard and psu. Have you tried one gpu at a time in the different pcie slots on the motherboard? Once you do that you could confirm the motherboard either is or isn't the issue. Leaving only the psu
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Old September 27, 2012, 12:10 PM
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Yes I tried a single card in both 16x slots, no issues. Today I am running ram at 1600 with a single card. Ran heaven dx11 all morning. Now tried some games. Did not get any problems.

The powersupply is 2 years old.

Now if it is the power supply, is 1050w too small or should I rma it to enermax?
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Old September 27, 2012, 05:12 PM
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Would my current powersupply be good enough to run a 670 gtx? I could sell of the 470 gtx and keep the 1050w.
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Old September 27, 2012, 05:17 PM
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1050w power supply is more than enough for that setup.

Swap the cards around and see if the problem persists first.
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Old September 27, 2012, 06:42 PM
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Quote:
Originally Posted by enaberif View Post
1050w power supply is more than enough for that setup.

Swap the cards around and see if the problem persists first.

I have tried all three gpu's, never have any issue with a single gpu.

Only when I first got the powersupply I was able to run 3way sli.
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Old September 27, 2012, 07:04 PM
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You may have a faulty PSU. 1050w should be enough for your rig. Give enermax a phone call. Explain what's happening and see if they will exchange for 1100w or 1200w. A lot of companies will upgrade a faulty piece of hardware. I know for a fact that Dell does. Get them on the phone and do a little negotiating. You never know til you try. Also,let them know you're a member here,and have asked for advice. I'm sure they know of the many potential buyers in a forum such as ours,and that may well impact their decision. Let us know what happens. Good luck!
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