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W series AC adapter compatibility

Question

What are compatible power adapters for the W520 and W530? I want to ensure that I have adequete power to my GPU and CPU. I know lower wattage adapters sometimes seem to work but I want to make sure I'm not damaging my Thinkpad.

 

 

Answer

As a rule of thumb, dual core model uses 135 watts, quad core model uses 170 watts.

 

If a lower wattage adapter works, it may not charge the battery and could severely limit or throttle the CPU. 

 

It is generally acceptable to use a higher wattage than needed adapter - i.e. a 170w adapter with systems that would otherwise only need a 90w, or a 90w, where a 65w is typically used.   However, it is strongly recommended that adapaters with less than required wattages not be used.

 

ThinkPad 135W AC Adapter

ThinkPad 170W AC Adapter

 

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