Power supply for Lenovo desktop

DCFC79

Been given a Lenovo desktop, its actually 1 of these

https://www.amazon.co.uk/Lenovo-ThinkStation-90BX001HUK-Desktop-Professional/dp/B00OPY11I2/ref=pd_lpo_sbs_147_t_0?_encoding=UTF8&psc=1&refRID=G28YDZBCZFSNNRX21P99

Only thing is Im needing the power supply which is similar to this from ebay item

https://www.ebay.co.uk/itm/Genuine-AJP-Lenovo-G50-80-80E5-SERIES-65w-Laptop-AC-Adapter-Charger-Power-Supply-/321850598595?hash=item4aefca64c3:g:ccEAAOSwLVZV5acI

The 1 found on ebay only mentions for use with Laptops but not desktops but I bet thats because laptops use the same power supply.

I have asked the seller if it would be suitable but what do you knowledgeable posters think ?

Thanks

Owain_Moneysaver

there is more than one type of E50-00 - hence the different power outputs. More powerful computers will need a 90W power supply, not the 65W (watt) mentioned, eg
https://www.ebay.co.uk/itm/Lenovo-Thinkstation-E50-00-AC-Adapter-Power-Supply-90W-4-5A-20V-/291848408913

But without checking the computer manual I couldn't say for certain.

DCFC79

Owain_Moneysaver wrote: »

there is more than one type of E50-00 - hence the different power outputs. More powerful computers will need a 90W power supply, not the 65W (watt) mentioned, eg
https://www.ebay.co.uk/itm/Lenovo-Thinkstation-E50-00-AC-Adapter-Power-Supply-90W-4-5A-20V-/291848408913

But without checking the computer manual I couldn't say for certain.

Thanks.

I dont have the manual but Ill see if I can get a pdf.

stragglebod

If it's the exact same model as the one you linked to then according to the specs here https://www.lambda-tek.com/Lenovo-90BX001HUK~sh/B1920374 its a '90/65W unit'. Whatever that means - does that mean you can get away with 65W? It's not clear.

Genuine Lenovo square adaptors are expensive even for lower wattage laptops. So if you do need 90W expect to pay a substantial fraction of what you paid for the computer, or put your trust in a no-name compatible off Amazon.

grumpycrab

stragglebod wrote: »

its a '90/65W unit'

I think 90W is used when there's a discrete (separate) graphics card in the box and 65W is for integrated graphics (the graphics are provided on the motherboard). So you could take the side panel off and see if there's a separate GPU OR show us a picture of the connectors (a separate GPU will have a separate connector).

If in doubt a 90W brick will not damage the computer; output voltage is important The computer needs 20V and both bricks provide 20V. (PS. I'm not an eletrician!)

stragglebod

Yes, you'll be fine if the brick can deliver more power than needed. But you definitely won't be fine if the computer tries to pull more watts than the brick can deliver.


I don't know if the square Lenovo connection actually passes minimum power requirement information to the brick; if so it might refuse to power up with insufficient wattage. A compatible/fake may not; which would be a very bad thing indeed if you get it wrong!