just 3 flashing green lights on the front.

Chris this article should help and i would bookmark it if i were you

http://www.dell.com/support/article/us/en/19/SLN288786

Trust me the 1234 codes / beeps are the same for the precisions ( i've got 3 different models )

If it's as easy as 3/4 staying lit plug a keyboard in and press F1 then enter ( same goes for 1/3/4 ) :-)

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Life is what you make of it :-)

When i'm good i'm very good , but when i'm bad i'm shi#eloads better ;-) In't I " buttercups " p.m.s.l at authoritie !!;-)

http://en.community.dell.com/support-forums/desktop/f/3514/p/19598555/20860747#20860747 seems to have a list from a guy at dell with a compatibility list and that does say the x5570 should work in theory, but ymmv due to the 3 motherboard revisions. Maybe the processors is faulty???

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When you get a Precision working properly it is a good machine but you have to jump through hoops to get there.

I got 3 up and running here and i had to install the o/s swap out the quadro's for 750ti's install the drivers and let em run , they work fine as they come Chris .
Mine mite be "quirky" but no major problems

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Life is what you make of it :-)

When i'm good i'm very good , but when i'm bad i'm shi#eloads better ;-) In't I " buttercups " p.m.s.l at authoritie !!;-)

I don't know what processors you run

Listed on " my computers " int it they ain't hidden and run em as they came

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Life is what you make of it :-)

When i'm good i'm very good , but when i'm bad i'm shi#eloads better ;-) In't I " buttercups " p.m.s.l at authoritie !!;-)