RAM issues

[JohnGabriel]

Sorry to jump into a technical talk with an old wives tale but I heard that if your Windows is not activated after 120 days it throttles some 64 bit features.

Could that be why your BIOS sees it but not Windows??

[Ñightsham]

What type Motherboard is it and memory type?

[Mosg2]

I've made no hardware changes in 6 months. 3 months ago when I was 10 boxing it was showing 16 gigs, so at some point between there and now that I've come back it went from 16 to 8.

I'm using the Asus P8Z68-V LX and my RAM is on the QVL.

My UEFI BIOS doesn't see the 16 gigs either, just the 8.

I'm going to:

1. Try and see if it'll POST with 2 sticks set at 1600.
2. Try and see if it'll POST with the B channel slots filled.

And I'll report back. Thanks for all the help guys

[Mosg2]

It did not post with two sticks at 1600.

It did not post with the B channels filled and nothing in the A slots.

It did post with A1, A2, and B1 filled but still only showed 8 gigs with any combination of which sticks were in which of those three slots.

This all leads me to believe that my B1 and B2 DIMM slots are bad.

Thoughts?

[Svpernova09]

Sorry to jump into a technical talk with an old wives tale but I heard that if your Windows is not activated after 120 days it throttles some 64 bit features.

Could that be why your BIOS sees it but not Windows??

This sounded odd to me, so I did some digging. Sorry to throw this in the middle of a technical thread, but I figured it would be better to set the record straight (at least somewhat)

Microsoft says:

If you don’t activate Windows within 30 days after installation, you will not be able to use every feature of Windows. You can regain full use of your computer by activatingWindows.

If you don't activate windows, it will put itself into a "Reduced Functionality mode"

This is for Vista, but everything I can find points to 7 being the same: http://support.microsoft.com/kb/925582 Scroll to "Activities that are not available in reduced functionality mode"

With that being said, I'd say that Reduced Functionality Mode wouldn't limit any specific 64 bit features.

[jstanthr]

mosq, as far as i know most z68 boards require you to fill DIMM slot 0 reguardless of how much your using. Try populating slot 0 and slot 3 and see if it picks both of them up

[Ñightsham]

I ran into this issue a while back with an ASUS P6X58D m/b and with memory on the QVL. I had purchased 4 sticks of DDR3 1600 4GB2x2 and when I had initially booted the computer it saw 16GB just fine. Then one day I had noticed when when checking my system properties it showed only 8GB. I cannot remember the specifics, but it had to do with XMP memory.

I put this memory is a different system and it worked fine, so I just purchased a different set of memory.

Like with your situation, it was working fine.... then all of a sudden it stopped recognizing the 16GB

[Mosg2]

I just tried slots 0 and 3 with no dice--It only showed the one stick of 4 gigs.

I went ahead and ordered 2 sticks of 8g corsair that'll be here tomorrow afternoon--Thanks Horus for Amazon prime. It's not on the QVL but it should plug in just fine on my P8Z68-V LX right Jsta?

http://www.amazon.com/gp/product/B00...ls_o00_s00_i00

[jstanthr]

It should work fine, but i'm leaning more towards your 2nd set of DIMM slots being bad. (error with southbridge) you'll know for sure when you get the new memory, but i would suggest getting an RMA for the motherboard, ASUS stands behind their products pretty well, i'd definately shoot them an email and get the ball rolling if i were you. IMO of course.

[Ughmahedhurtz]

I just tried slots 0 and 3 with no dice--It only showed the one stick of 4 gigs.

That's correct. The pairs are interleaved, so 0 goes with 2, 1 goes with 3. Can't mix and match slots unless you change the BIOS setting from dual-channel to single-channel.