I just add the 2nd GTX to my top rig ID: 5725752, and yes the old problem with restart is here again. The machine working perfectly 24/7 with 2 GTX295 and 1 GTX285.
When I add one more GTX285 the machine restarts after 5-6 minutes.
I tried to reinstall drivers with new ones but nothing. Change the place of the cards, nothing. Update bios, nothing again.
Power supply is not an option, because I have 3 working together. One Thermaltake 1500w, and 2 modular 650w. Motherboard is the Asus P6T7 WS SuperComputer. Slot is not fault because I have 7 slots to try, and at the past I was working together 4 gtx285. And yes I tried more than one GTX285.

Anyone?

---

If it that regular I would suspect am "Over Temp." The shutdown is a protection restart.

The suspect would be North/Southbridge on the Motherboard.

Regards

---

Please consider a Donation to the Seti Project.

could one of these things be worth a shot?

http://www.evga.com/products/moreInfo.asp?pn=100-MB-PB01-BR&family=Accessories%20-%20Hardware&sw=4

---

Janice

Seems to me like a bad joke, pulling power from an slot on the Mobo.
Better to adapt the right power directly from your PSU!
I would be very carefull with such a 'trick'. Can kill your mobo.

---

Seems to me like a bad joke, pulling power from an slot on the Mobo.
Better to adapt the right power directly from your PSU!
I would be very carefull with such a 'trick'. Can kill your mobo.

I think you have it backwards, this plugs into a lead from the PS and puts it on the MB.

---

SETI@home classic workunits 4,019
SETI@home classic CPU time 34,348 hours

I don’t think it is the slot or the power supply because at the past I used 4 GTX 285 at the same time.
I already change the vga to another slot and another power source, and is happening the same thing. I think that something is happening with Boinc.
I think the program itself cannot work with this kind of mixing, I mean 2 GTX 295 and 2 GTX285, at the same time.

---

[quote...The machine working perfectly 24/7 with 2 GTX295 and 1 GTX285.
When I add one more GTX285 the machine restarts after 5-6 minutes...
[/quote]

your 1500 watt should be sufficient all by its self for this configuration. my oc'd i7 @ 4.2ghz with three 295's pulls about 1100 watts (1050 average) from the wall, powered by a single thermaltake toughpower 1200 watt ps.

with three power supplies please make sure you bond the grounds together to prevent weird currents flowing thru the motherboard.

---

The funny thing is that I played Counter Strike  for half an hour, with all those cards on and the machine does not restart. That’s why I told about the faulty Boinc.

---

CS doesnt really stress a modern GPU. my GPU easily plays CS without getting less than 100 FPS even with smoke being used. Seti will stress your GPU. I recommend getting GPUz and allow it to run while you play CS. Check the average temperature. Then start crunching Seti. I bet the temps go way up

---

In a rich man's house there is no place to spit but his face.
Diogenes Of Sinope