W520 i7-2860QM with 2 memory modules and CPU-Z Reporting them as Slots 1 and 3?

Is this normal for CPU-Z (1.59, 1.60, 1.61) to report a matched kit pair of properly populated memory modules as Slots 1 and 3 in "dual" mode? One is under the keypad in the upper slot #0 while the other is in slot #1 under the chasis on the left closest to the DVD (with the black plastic frame).
Slots 2 and 4 in CPU-Z are reported empty.
I think this is okay and just the way CPU-Z is setup to report the SPD info but would like to double check out here with others using only 2 of their 4 memory slots.
I'm running a fresh clean bloatware-free Win7 Pro SP1 installed to my Samsung 840 Pro 512GB SATA-III SSD and holding at BIOS 1.36. I'm using 1600 speed 2x8GB Corsair Vengeance modules (a 2x8 kit with adjacent module serial numbers). Optimus and the integrated graphics are both disabled in BIOS and the unit never leaves its 170W Series 3 Plus docking station w/ external monitor, keyboard and mouse ..... it runs with the lid closed nice and cool, plus quiet also.
CPU-Z also reports I'm actually running at 1600 on the memory and I have thrown every torture test I know of at this configuration and have not had any issues yet over the last 6 weeks. Benchmark programs are also all on the very high end of the ranges published for W520 units ..... probably with a lot of help from that 512GB SSD SATA-III Samsung 840 Pro.
I never plan to ever use the on-board graphics, so I'm getting ready to install my other identical Corsair 2x8 kit next week and see if stability issues arise at 32GB using 4 modules ...... will hold at BIOS 1.36 unless things start happening at 32GB.
Thanks in advance for any input about the way CPU-Z reports pairs of memory modules.
Two (I used to have Five) - T61p 15.4" WS T9300 2.5Ghz units, August 08/08 Builds with FX570M Nvidia Graphics; ... One W520 i7-2860QM w/2000M Nvidia Graphics (most recent acquisition and stupidly fast); .... One - T42 4:3 15" Flexview 1.8GHz with ATI Graphics (still perfect for traveling); ... Two - T500 15.4" units both with ATI HD3650 Graphics.

Quote
Originally posted by Wonkanoby
if it drops that low rms the psu
Sorry for asking, but what's rms? I found nothing on google that seemed to fit in, but I guess you mean to get rid of the PSU and get a new (better) one.
I also ran memtest86 for 3+ hours and it seemed that one of my memorysticks was heavily corrupted.
So I removed that one and ran memtest86 again for an hour without any problems, but the volt keep dropping anyway... and the freezing-problem persists.
Hopefully I can purchase a PSU on approval and run some test.
Thanks for the quick answers guys!
edit: By the way, which brand do you recommend for the PSU? Right now I have Topower, cheapest one I could find when I bought my computer about a year ago (only bought the two extra memorysticks last week).

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