w510 Dual Channel memory not supported?

[hoplite]

I just ran CPU-Z and it indicated that I had ram in slots 1 and 3 and that my memory was running in single channel mode. I did a quick run through crucial.com looking for memory and it stated that the w510 did not support dual channel memory. I know that's not the best indicator but is that true? Do w510 only support single channel?

Sorry if this was asked before I did a search and couldn't find anything.

[Harryc]

The W510 is dual channel capable. Try moving the DIMM in slot 3 to slot 2.
http://www-307.ibm.com/pc/support/site. ... MIGR-75377

[hoplite]

Thanks for the info. I moved the stick from Slot 3 to Slot 2 and still no dice. CPU-Z still reports that I'm running in single channel mode. I have a stick in Slot 1 and a stick in Slot 2.

[Harryc]

This may be an issue with CPU-Z. It would be interesting for another W510 owner to run it.

[freakwave]

Hi,

it definitely supports dual channel. Mine came with 2x 2Gig installed. Both dimms in the internal slots.
This will not be in dual channel. I installed one of the 2Gig in one of the outside slots and then CPU-z showed the dual channel mode.

Just on a side note, I had 2 older crucial 4Gig sticks and they crash the system when run in dual channel. In single channel mode they run fine.

I sent them back for replacement.

[hoplite]

I checked this under Everest as well and my memory was only running in single channel. I went out and bought another 4GB (2x2) of RAM and put that in the two empty slots for a total of 8GB and now it's running in dual channel.

CPU-Z reports the following:
Slot 1: This is the bottom most slot under the keyboard.
Slot 2: This is the slot on the left when the computer is upside down and the screen hinge facing away from you.
Slot 3: This is the top most slot under the keyboard.
Slot 4: This is the slot on the right when the computer is upside down and the screen hinge is facing away from you.

Everest Motherboard > SPD labels these as DIMM(1,2,3,4) and the physical location is the same as CPU-Z.

Everest Chipset > Northbridge
DRAM Slot#1 corresponds to Slot 1/DIMM 1 (Under keyboard)
DRAM Slot#2 corresponds to Slot 3/DIMM 3 (Under keyboard0
DRAM Slot#3 corresponds to Slot 2/DIMM 2 (bottom of laptop)
DRAM Slot#4 corresponds to Slot 4/DIMM 4 (bottom of laptop)

I have no idea why the northbridge labels the memory slots differently.

My WEI Memory score jumped from a 5.5(!!!!) to a 7.3 with the addition of the memory and I believe in part because the memory is running in dual channel mode now. I wonder if anyone else with a w5xx or w7xx has this issue. I also wonder why, out of the box, it was running in single channel mode.

[hoplite]

it definitely supports dual channel. Mine came with 2x 2Gig installed. Both dimms in the internal slots.
This will not be in dual channel. I installed one of the 2Gig in one of the outside slots and then CPU-z showed the dual channel mode.

Yeah I tried that as well and it didn't work. Perhaps I didn't seat the RAM properly. It works now but I don't think it should be necessary to fiddle around with a brand new laptop to get it to run as advertised.