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Paper Tape
Posts: 1
Registered: ‎04-03-2019
Location: US
Views: 333
Message 1 of 3

lenovo p720 with 900W not capable to install 2x 8180


i just upgraded p720 with 2x 8180 (205W), system has 12 dims of ddr4 samsung 32GB, no CD (removed) and 1 Nvidia p4000.

only 1 hard disk (SSD), and now the syste cannot work properly, cmos says the the power sypply not capable for the setup, and when it boots to windows, everytime i run heavy task such as simulation, it automatic shut off (i believe the 900W cannot handle the power consumed by setup).

but this is weird since 2x205W+about 150W for P4000( some say it is just 104W)+ 12x15W (assume each 32GB ddr4 consumes 15W) still less than 900W.


please help.

Punch Card
Posts: 11
Registered: ‎07-26-2015
Location: FR
Views: 306
Message 2 of 3

Re: lenovo p720 with 900W not capable to install 2x 8180

Most power supplies hit their peak efficiency levels with loads in the range of 40 to 80 percent. Building to about 50 to 60 percent of a PSU's capacity is advisable to achieve maximum efficiency and yet leave room for future expansion.


Your configuration is about 700W, 80% of your PSU's capacity : that's huge !

Lenovo Staff
Lenovo Staff
Posts: 3,914
Registered: ‎02-22-2010
Location: NC
Views: 294
Message 3 of 3

Re: lenovo p720 with 900W not capable to install 2x 8180

This actually has very little to do with power supply efficiency, and everything to do with the CPU VR design of the motherboard.


8180 CPUs (rated at 205W TDP) are not supported on P720 because the board is simply not designed to handle them.  8180 CPUs are only supported on P920, which has a beefier CPU VR design. 


Currently P720 supports a max of 150W for CPU TDP.  There are plans to change the P720 motherboard to add support for up to 165W CPUs, but there are no plans for that platform to get to 205W CPU support.


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