upgrade elitedesk 800 g5 cpu

[x23are]

Hi to everyone.

I have An elitedesk 800 G5 with i5  9500T cpu and 65w adaptor.

i wanna to upgrade my cpu to i9 9900k. I check support page and see this model support i9 9900k.now which work must i do?

change cpu and get a 150w adaptor ?

is there any special note i dont know?

[itsmyname]

@x23are -- change cpu and get a 150w adapter ?

Is this the processor that you intend to use: Intel® Core™ i9-9900K Processor (16M Cache, up to 5.00 GHz)

It seems to require 95 Watts by itself.  So, definitely, your 75 Watt power-supply will be insufficient.

[x23are]

yes if everything ok i will buy a 150w power supply. but in some topic i see something about mainboard compatibility?

[BeemerBiker]

As suggested by Itsmyname, the new CPU requires more wattage than your old CPU.  In addition you may have to add fans to help cool the CPU especially if running at turbo speed.

There are several versions of the 800 G5.  One optionally comes with an RX-560.  If you have that model you may have enought power to add a better cpu.

[x23are]

Finally i upgraded to i9 9900k. i buy a 150w ac adaptor ( for T cpu series you can use  original 65w adaptor and for cpu like 9700 or 9900 you can use 95w adaptors and for k series you must use 150w adaptors)

the board support i9 9900k without problem but when you order from hp they put a special heatsink for better cooling down cpu. (with this heatsink you can't use GPU or sata hdd ) .

whit normal heatsink the temperature and fan speed was too high and i turned off turbo boost for lower temperature and decrease fan speed. and now it work like a giant.

if anyone want to use most power of the CPU must order the custome Elitedesk 800 G5 mini  from HP and they put best heatsink for it  or buy a heatsink like this :
this