Lenovo Thinkpad 3 W510 4318-CTO questions

I recently purchased a W510 4138-CTO Thinkpad. It was bought missing a few components, battery, power supply and ram memory.

1) I tried to use a T510 power supply, but I get a logon BIOS message stating a stronger ( higher wattage) power supply is required, and this W510 will operate at reduced performance until the higher wattage power supply is connected! Just what was the OEM power supply wattage rated at?
Ebay shows 3 wattages for a W510, 90 watts which I have already and BIOS says its incorrect, then a 135 watt power supply and then a 170 watt power supply? Which is correct for this machine?

2) I only had two spare ram modules of the PC3 type, a 4gb PC3 10600 and a 4gb PC3L 12800. I tried using both simultaneously, one module PC3 in top slot under the keyboard, and the other one a PC3L type ram in the underneath slot behind ram panel. I Googled to see if PC3 type ram can be used together with the PC3L and the replies I got were no problem, even though the PC3L was a 1.35 vdc module.
But yet the PC3L either used in conjunction with the PC3 or alone, would cause the W510 to lock up at the "Starting Windows" screen! So are they NOT compatible?

Is there a speed problem with this W510 and the PC3L at 12800?
Is having the wrong power supply limiting speed/voltage to the PC3L module causing the lock up ?
I want to buy new ram for this W510, what type /speed /amount can I ( should I) get?

3) Speaking of new ram, what is the maximum for this machine? I'm getting 3 different answers! But first is how many slots this machine has! I'm told four, but I've been inside and there are only TWO. So one MEMORY vendor says i can only put 8gb of MAX ram (2 x 4gb modules), another says 16 gb MAX (2 8gb modules), and yet another says 32gb MAX (2 x 16gb modules) !!! Anyone know which is correct?

Thank you for your time!

 

1) My W510-4319 came with a 135 watt PSU - provides enough power to get full performance. I suppose a 170 one is for later models, e.g. W520, etc.

2) According to PSREF the supported memory type is PC3-8500 1066MHz DDR3 (and that's what I have in mine). However the DDR3 memory controller supports up to 1333MHz, so PC3-10600 may also work but I haven't had a chance to test it. Can't comment on the PC3L either - never tried it. Personally I would stick with PC3-8500 just to be 100% sure.

3) In my case there are 4 slots and 16GB of ram (4x4GB), so I could potentially get 32GB (4x8GB). In your case the max would be 16GB (2x8GB).

 

thanks black lion for your input