GA-P55A-UD3R rev.1 & OCZ3P1333LV4GK memory stability issues

[Dark Mantis]

I am running a not that much more power hungry setup than you and found that even my new Zalman 750 wasn't enough and had to swap it for a Corsair HX850.

I doubt that was ever the case...not sure what you mean by new Zalman 750? maybe it was faulty?

Hi Peter and thanks for the input. No it was definitely the brand new Zalman 750W PSU and there was nothinhg wrong with it I am still using it now in another machine. I think it was all down to the Zalamn having 4 x 12v@18amp lines rather than one  and even though the total output was enough each individual line wasn't for booting. It would fall over when trying to boot every time. I bought a Corsair HX 850W and no problem. This isn't the first case by far that I have had (many on this forum)with this exact problem that has been fixed by replacing the PSU.

CPU Enhanced Halt
Intel(R) Turbo Boost Tech
C3/C6/C7 State Support
CPU EIST Function

I water cool anyway so I have these settings disabled anyhow. Thanks for your concern.

[Peteruk]

CPU Enhanced Halt
Intel(R) Turbo Boost Tech
C3/C6/C7 State Support
CPU EIST Function

I water cool anyway so I have these settings disabled anyhow. Thanks for your concern.

That was for the OP....

[Dark Mantis]

Oops! My bad, but you quoted me, anyway I will leave the post in case anyone can get an insight from it. Thanks anyway Peter.

[Peteruk]

Hi Peter and thanks for the input. No it was definitely the brand new Zalman 750W PSU and there was nothinhg wrong with it I am still using it now in another machine. I think it was all down to the Zalamn having 4 x 12v@18amp lines rather than one  and even though the total output was enough each individual line wasn't for booting. It would fall over when trying to boot every time. I bought a Corsair HX 850W and no problem. This isn't the first case by far that I have had (many on this forum)with this exact problem that has been fixed by replacing the PSU.

That still shouldn’t be a problem I have a 4 x 12v@18amp  650W PSU thats over 3 years old thats powering for about 1 year a i7, 295GTX, 8800GT & six HDD fine. The Zalman might of had too strong protection limits and turned off or the board took to long to power up to send a power good signal and turned off.

All PSU makers have different spec to how long the send a power good signal delay is or when their protection is tripped....but then this was never the case for the OP here.      

[Dark Mantis]

Yes quite possibly you are correct in that assumption. As you say this is nothing to do with the OPs problem so we will leave it there.

[pauloos]

Sorry guys for not responding earlier......
Tnx for putting me on the right track; I ended up with timing setting 7/7/7/30, VRam 1.64, multipl. 10X
Everything seems stable now at 1333 MHz (memory)
Prime95 gives me the occasional error report but I think that has to do  with one of the old PCI cards I use.
Without the PCI cards it's rocksolid esp. with W7 64bit (wow, really quick machine with that op.sys.!!)
All other stability tests report a stable system (with PCI cards inserted)
I'm almost starting to think Prime95 isn't the best testing software for everyone? (but what do I know :-)

Cheers, I'll drink one in your health! ;-)

[Dark Mantis]

Glad we could help. Try updating the driver for your PCI card and that might make it more stable.