switch556 Posted April 2, 2011 Share Posted April 2, 2011 Hi there, I was attempting to SLi two GTX460s (768mb) on my machine. Here are the specs. Intel Core i7-950 @ 3.06ghz (stock)Gigabyte X58A-UD3R (rev. 2.0) moboCorsair XMS3 12gb DDR3-1600 (downclocked to 1333) RAMMSI Cyclone GTX 460 w/768mb RAM (Factory OC'd)4 SATA drives (all 7200 RPM)1 optical DVD-R/RW driveSeveral external USB devices1 internal USB/memory card readerCorsair HX850 PSU.Windows 7 64-bit Ultimate Computer was running fine, I shut it down to install the 2nd card. I was using a grounding wrist cable, installed all the hardware and the PC started up, but then immediately shut down, didn't post. I thought maybe the PSU wasnt providing enough juice so I removed the 2nd (new) card and tried to start the PC again, but it was doing the same thing, but now it is in an endless start/reset cycle, it never posts and shuts down after about 3 seconds and then starts up again after like 15 seconds. I purchased a power supply tester (Cool Max PS-228) and the PSU voltages test ok, but the tester alarm beeps and the P.G. value reads "HH" which means too high, according to the Cool Max site it means its running above 900ms. I went out and purchased another HX850 figuring mine was bad and the brand new out of the box (not even installed into my case) HX850 is reading the same values. Is it possible I could have 2 bad PSUs? Is the default P.G. value of the HX850 normally higher than 900ms? What can I be doing wrong here? Not enough juice? I am not a novice around PCs, Ive been building my own gaming rigs since high school (in my 30s now). Link to comment Share on other sites More sharing options...
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