Hi guys, first time poster, and I'm not sure this is the right place but I hope you can help.
I recently purchased a bunch of parts from newegg to build a computer, the first time I have actually built one. Everything has actually gone pretty smooth, except right away I started noticing something strange about my memory. Upon first boot, I loaded defaults, and changed only the boot devices, and then installed Windows 7. Bios as well as Windows System Information showed all 12GBs. So, the next morning, upon cold boot, I noticed the BIOS only showed 10GB with still nothing changed and Windows System Information showed 12GB RAM (9.99 Usable). So I went into BIOS and set XMP profile 1 and changed Memory speed to 1600mhz, nothing else was changed and rebooted. The BIOS showed 12GB and Windows System Information showed 12GB. So I shut it down and after a few hours, upon cold boot, I noticed BIOS showed 10GB and Windows System information was Showing 12GB (9.99 Usable) again. So I rebooted and went into BIOS, changed it to 1333mhz and XMP Profile 1. Sure enough everything was fine again. After the next cold boot I had to change the memory settings again for it to register all 12GBs in BIOS and for windows to show 12GB with 12GB (9.99 Usable). Seems to happen more upon cold boots and not warm boots. So, I decided to run Prime95 @ 1600mhz XMP Profile 1 - no errors after 4 hours. So I ran memtest86+ 4.00 at 1600mhz and XMP Profile 1, sure enough after 1 hour 57 minutes on pass 2 showed an error between 8GB and 10GB. I went into BIOS, set memory at defaults, 1066mhz and Standard Profile and ran memtest again. After 13 hours, 7 minutes, and 7 passes, no errors. So I guess I would like some insight as to whats going on here. Also I'd like to add I have latest drivers for everything and latest BIOS for my motherboard. Thanks
CM HAF932
EVGA e760 X58 Classified BIOS ver.56
Intel Core i7 930 @ Stock
Prolimatech Megahalems Rev.B
12GB (6x2GB) Corsair Dominator DDR3
(2x) XFX Radeon 5870 Crossfire X @ Stock
Corsair HX750W
(2x) OCZ Vertex 30GB SSDs in RAID+0
(1x) Samsung Spinpoint F3 1TB
HT|OMEGA Claro
Logitech Z5500 / SteelSeries Siberia V2
Saitek Eclipse / Logitech G500
2x Lite-On 24x DVD-RW
Windows 7 Professional X64
I recently purchased a bunch of parts from newegg to build a computer, the first time I have actually built one. Everything has actually gone pretty smooth, except right away I started noticing something strange about my memory. Upon first boot, I loaded defaults, and changed only the boot devices, and then installed Windows 7. Bios as well as Windows System Information showed all 12GBs. So, the next morning, upon cold boot, I noticed the BIOS only showed 10GB with still nothing changed and Windows System Information showed 12GB RAM (9.99 Usable). So I went into BIOS and set XMP profile 1 and changed Memory speed to 1600mhz, nothing else was changed and rebooted. The BIOS showed 12GB and Windows System Information showed 12GB. So I shut it down and after a few hours, upon cold boot, I noticed BIOS showed 10GB and Windows System information was Showing 12GB (9.99 Usable) again. So I rebooted and went into BIOS, changed it to 1333mhz and XMP Profile 1. Sure enough everything was fine again. After the next cold boot I had to change the memory settings again for it to register all 12GBs in BIOS and for windows to show 12GB with 12GB (9.99 Usable). Seems to happen more upon cold boots and not warm boots. So, I decided to run Prime95 @ 1600mhz XMP Profile 1 - no errors after 4 hours. So I ran memtest86+ 4.00 at 1600mhz and XMP Profile 1, sure enough after 1 hour 57 minutes on pass 2 showed an error between 8GB and 10GB. I went into BIOS, set memory at defaults, 1066mhz and Standard Profile and ran memtest again. After 13 hours, 7 minutes, and 7 passes, no errors. So I guess I would like some insight as to whats going on here. Also I'd like to add I have latest drivers for everything and latest BIOS for my motherboard. Thanks
CM HAF932
EVGA e760 X58 Classified BIOS ver.56
Intel Core i7 930 @ Stock
Prolimatech Megahalems Rev.B
12GB (6x2GB) Corsair Dominator DDR3
(2x) XFX Radeon 5870 Crossfire X @ Stock
Corsair HX750W
(2x) OCZ Vertex 30GB SSDs in RAID+0
(1x) Samsung Spinpoint F3 1TB
HT|OMEGA Claro
Logitech Z5500 / SteelSeries Siberia V2
Saitek Eclipse / Logitech G500
2x Lite-On 24x DVD-RW
Windows 7 Professional X64