RAM disappearing from EX58-Extreme

[Badbonji]

I recently installed a new CPU waterblock and graphics card and since then I am never able to use all of my RAM

(Spec in sig)

BIOS detects 4GB, but then CPU-z detects each stick in Windows as well as Windows showing the full 6GB of RAM. However, next to that it said only 4GB was usable, and CPU-z said the RAM was only in Dual Channel.
I rebooted and checked in the BIOS, everything is fine in there, but now only 2GB is usable in Windows (one stick) in Dual Channel from CPU-z (not sure how that works?) but all 3 are still able to be detected.

Using Windows 7 64 Bit, memory isn't limited in MSCONFIG.

[Dark Mantis]

The crucial point here seems to be that everything was working until the upgrade. Make sure that you haven't overtightened the CPU waterblock down. Apart from that try Memtest86+ to make sure that all your sticks are in good condition. I take it that you didn't update the BIOS or anything similar at the same time?

[Badbonji]

Sticks work seperately by their own in the first slot. Just tried updating the BIOS, didn't help. Now it keeps going in a POST loop saying "Recovering lost DRAM size" and reboots over and over. What gives?

EDIT: Just loosened the waterblock a little. Only 4GB is being detected in the BIOS still, not able to get into Windows as it keeps rebooting at "Recovering lost DRAM size"

[Dark Mantis]

You could try clearing the CMOS, that might help. Otherwise it sounds like a faulty memory problem to me.

[Badbonji]

Ok I tried the following configurations with the following results:

DRAM stick 1 in slot 1 : Black screen when loading windows
DRAM stick 1 in slot 3 : Black screen when loading windows
DRAM stick 2 in slot 1 : BSoD on login screen (rdyboost.sys)
DRAM stick 2 in slot 3 : BSoD on login screen (rdyboost.sys)
DRAM stick 3 in slot 1 : Black screen when loading windows
DRAM stick 3 in slot 3 : BSoD on login screen (rdyboost.sys)

I have no idea what caused this, just had a nice gaming session of Fallout 3 and a bit of COD: MW2 with no issue.
Is this the motherboard or the RAM (or both?) Temperature of CPU was around 38C at 4.05 GHz with 1.26Vcore when gaming.

[Badbonji]

Problem solved. CPU was becoming unstable because I couldn't remember all the individual voltage settings from before the BIOS flash. No idea why it disappeared in the first place. Will be on a overclocking mission tomorrow to get back to 4.35Ghz though. Thanks for the help!

[Dark Mantis]

No problem just glad you got it sorted out.