is your rig like the Legacy on the left or the post-Dell on the right?
For now, Windows has its own Memory diagnostic you can use to test the new ram. I believe it is Corsair that says to test their ram with the "memtest86" program before trying to return it. A program like Intel XTU can stress test the ram for you.
If the rig on the left has bios features that can tweak ram, (set xmp/voltage/timings etc) we might find a way to tweak it. Certainly the one on the right has ways to tweak memory.
So you had 2Gb dims of 10666 and simply replaced them all with 4gb dims? I'm sure if my pc blue-screened after a simple memory swap, I'd reseat them in different slots (over & over if necessary), hoping to find the so-called sweet spot arrangement. Perhaps now is a good time to blow the dust out of the dimm slots.
This is info taken from a post I did last week:
"Your socket 1366 mthrbrd can support 12gb (3x4Gb) @ 1600MHz (pc3-12800) or 6Gb (3x2Gb) @ 1866MHz (I've used pc3-14900 & pc3-15000 ... you may overclock to 1866, maybe get to 2000Mhz, maybe not get to 2133Mhz, see note below):
My note: GO TO BIOS > Enable XMP profile for 1600/1866 etc, see if it boots, if not, go to bios:
My note: memory ratio / multiplier:
OC on A-51 for typical bios screenshots:
Due to the Intel cpu you have, you will do best to have bought "tri-channel" capable memory: three matched dims.
My understanding is that all ddr3 memory begins life as 1333MHz (10-666) base speed, and the ones that can be stable when overclocked are marketed as "1600Mhz" etc,
You should be striving for 1600MHz minimum, 1866 maximum.
In your bios, as I said above, you can enable xmp profile. If it doesn't boot, then you play with the multiplier & uncore voltage.
If your PNY is in fact tri-channel, then you can reseat the dims etc as said earlier, or do mem tests on it. If it is not tri-channel, that may be the problem?
I'm running bios A11; it's been 18months since I flashed it, so, I no longer remember "where" I downloaded it from or "what" the true bios file "name" was (a12/a11 etc).. Here is the Area51 "historical drivers page":
I'm not recommending a bios upd8 for you, because the one you have works. The one you have should have memory overclocking/tweaking features. But a10 is not a11: a11 is the latest/last bios from A-ware for A-51. In other words, I wouldn't want you to "brick" your MB today doing a flash, since I never said a bios update will get your pny to work. upd8 bios @ your own risk (using old mem while you do so?)
Newegg.com has tri-channel mem all day long:
Ok, I sent you a link to the a11 bios; if you were to flash to a11, & it was successful, I think it automatically reverts everything to default values when it completes. It's been 18months since I flashed to a11, I do not remember if this is true or not, but if after you flash to a11 you can not get past the windows logo screen, then yes you would go into bios and enable your ahci sata controller.
Ok, if after a bios flash, your old memory reverts to 1333 default, then yes, you would enable xmp, & overclock, if it is capable.
If after the newegg memory gets there, what would happen, I think, is you would install it & your bios, I think, will automatically set it to run @ 1333 base value. You would check bios to see all 12gb is detected > boot up of course to make sure it works & all 12Gb accounted for in Windows, then reboot, go to bios and set xmp "on" (if it is not set on of course). set xmp profile to 1600mhz (profile #1 for instance), make sure it boots up.
If it tries to boot & can't, ("warning, overclocking failed") then you go back and turn xmp off, fool w/multiplier & uncore volts as stated prior.
Have you seen the xmp / memory ratio / uncore volts menu features in your a10 bios?