=========> similar problem
anyone can explain it ? :
*********noormanman said:
Thank you for all anwsers above. I just upgraded my HP 6005 Pro SFF with an Geforce 750 Ti and it works perfectly
(model GV-N75TOC-2GL)
Note that I did have to change a bios setting, the PCI-e x16 slot was in x8+displayport mode, the PC did not boot past the initial bios message, nor could I acces the bios setup screen. In x16 mode everything was OK.
The HP documentation does say that the PCI-e x16 slot is limited to 25W. However, the same motherboard (type: 531966-001) and bios is used in the non-SFF chassis, and there the slot is limited to 75W (as it should). So I have to agree to americanbrian that this is only an PCI spec half height card issue, not a limitation of the SFF PC.
The power supply is 240W. The system uses under full processor load WITHOUT the nvidia card (prime number stress test) 136W.
This means that I have about 100W spare for my graphics card. I assume the card is max. 75W as this is the PCIe maximum for graphic cards without an extra power connection.
Further. on this power supply is a sticker which says:
12V generic rail: 14A max.
12V cpu rail: 12A max.
Total load of all rails may not exceed 240W.
This means that power supply has a seperate rail for the CPU, so most of the 12V generic rail is available for my new graphics card. as this is max. 75W (75W / 12V = 6.25A, not even close to 14A) this power supply should handle this new graphics card easily.
Playing a game (Metro 2033) the pc usage is about 150W. Despite that the graphics card does say it needs a 400W power supply, my 240W is more than enough.
Please note that this does not say that any power supply does work, the 12V rail must have enough power to power both the CPU and the graphics card. Cheap power supplies may have enough power on the 5V/3.3V rail, but lack the power on the 12V rail.
I hope my 2c can help anybody out there!************