280 or 400 watt?

[Demasoni]

Hello, i recently purchased an hp elitedesk 800 g2 tower from certified Microsoft refurbisher...the cheapy Hajaan SSD makes a grinding sound after shut down...is this normal?...also my main question:  i have a generic hp 280 watt power supply installed. (Lite On brand with 80 plus platinum rating)...i wish to install a dedicated gpu card, the best one i can get without external power connector and that this power supply can safely support.  However after contacting customer support from refurbisher, he says ps is actually up to 400 watts with power factor...i am confused, because the hp hardware manual says it is 280 watt, but can reach 400 watt with power factor?!?..I am old school and 2 decades ago a ATX  computer power supply would source the wattage exactly what was stated on it!...Help, confused...What is best graphicscard recommendation for this tower?...also on a different note i have noticed pretty slow data transfer speed on USB ports, but have now disabled antivirus autoscan when usb detected occurs....could this lag also be caused by windows 10 or is it strictly hardware?...the gimmicky graph chart showing the speed of data transfer is laughable...they put it in there to appease user while they are waiting....reminds me of the old GOzilla download accelerator graph!...My Vista laptop and old XP Dell Gx270 (still working after Mobo recap) have about 10 to 20x faster usb data transfer....thanks for reading...

[NonSequitur777]

@Demasoni,

Welcome to our HP User Forum!

Your HP EliteDesk 800 G2 Tower PC, according to: http://h10032.www1.hp.com/ctg/Manual/c04832338.pdf, can be fitted with either a 280-watt power supply (HP p/n: 901909-001 / 901911-004 / 758752-001 / 796418-001), or a 400-watt power supply with HP p/n: 796416-001 (Reference: https://partsurfer.hp.com/partsurfer/?searchtext=P1G41EA&searchby=product). This power supply has one 6-pin PCIe power cable.

And no, a 280-watt power supply cannot and will never provide more than 280 watt.

You can purchase a 400-watt power supply online via eCommerce companies, such as eBay: https://www.ebay.com/sch/i.html?_from=R40&_nkw=HP+796416-001&_sacat=0&LH_TitleDesc=0&LH_BIN=1&rt=nc&....

Obviously, a 400-watt PSU will greatly increase the number of graphics cards you can choose from.

Hope this was helpful.

Kind Regards,

NonSequitur777

[DGroves]

per your post:

the cheapy Hajaan SSD makes a grinding sound after shut down...is this normal?

SSD's contain no moving parts, as such the ssd is incapable of making any noise so look elsewhere for the source of your noise such as the audio components like external speakers with built-in amplifier or the systems onboard audio config