PCI-E x16 25W limit, GPU needs max 30W - AMD R7 240 in dc7700 small factor, please help

[xdon82]

Hello
I have HP dc7700 small factor computer
PSU model: DPS-240FB - 240W I found out it's Delta Inc product
V12 11.5A VCPU
V12 7.5A


E6600 processor [max 65W]
4 x 1 GB DDR2 RAM
1x HDD regular SATA
1x DVD-ROM
2x about 80mm FANs

I want to upgrade my GPU
I found interesting new card, perhaps it's not powerful, but not bad
it's AMD R7 240 - Max TDP 30W

So, probably PSU can handle it
but
on the producent site there is terrible information: http://h18000.www1.hp.com/products/quickspecs/12543_ca/12543_ca.pdf
PAGE 11

Power for PCI-E x16 is limited to 25W

and I have 3 questions:
1. is it only kinda recommendation not to exceed 25W due to weak PSU

2. if it's limited , so in which way ? by software [bios] hardware?
any possibility to gget additional 5W

3. what will happen if I put 30W GPU into 25W PCI-E x16 slot ?

any ideas what to do?
only 5W to be happy 😉

 

[rezamm]

Nameske, my PC works perfect. There is a HP problem that the PC cannot recover from a sleep state, but I disabled power saving in windows 10 to 'solve' that. As for the PCI bios setting, this option does not show in my bios anymore. It is probably hidden as the x16 card is already in my system and claimed the x16 bus. As your GT220 is also working, you are good.
The 'resource hungry' games I played are XCOM enemy unknown, Metro 2013 and heroes of might and magic III HD edition.

i have a 6005 pro SFF too. and wanna to ad 750 ti to my 6005
so you said i change the bios setting , how to do that ? my bios version is v01.17

 

[JISGMR]

I think you will be fine. The PCI-E standard states that a graphics card should be able to pull 75W of power off of the mobo interface safely. The 25W limit is for any other type of expansion card...

http://en.wikipedia.org/wiki/PCI_Express

HIII......SIR i have same problem my Dell optiplex 755 sff small from factor Gpu slot is
PCIe x16 (16.1) 25w and my PSU is 230-240w can i use nividia Gt-1030 in this board
because the gt-1030 want 30w of power can my gpu slot give that much power

 

[JISGMR]

I think you will be fine. The PCI-E standard states that a graphics card should be able to pull 75W of power off of the mobo interface safely. The 25W limit is for any other type of expansion card...

http://en.wikipedia.org/wiki/PCI_Express

HIII......SIR i have same problem my Dell optiplex 755 sff small from factor Gpu slot is
PCIe x16 (16.1) 25w and my PSU is 230-240w can i use nividia Gt-1030 in this board
because the gt-1030 want 30w of power can my gpu slot give that much power

 

[JISGMR]

I think you will be fine. The PCI-E standard states that a graphics card should be able to pull 75W of power off of the mobo interface safely. The 25W limit is for any other type of expansion card...

http://en.wikipedia.org/wiki/PCI_Express

HIII......SIR i have same problem my Dell optiplex 755 sff small from factor Gpu slot is
PCIe x16 (16.1) 25w and my PSU is 230-240w can i use nividia Gt-1030 in this board
because the gt-1030 want 30w of power can my gpu slot give that much power

 

[DSzymborski]

HIII......SIR i have same problem my Dell optiplex 755 sff small from factor Gpu slot is
PCIe x16 (16.1) 25w and my PSU is 230-240w can i use nividia Gt-1030 in this board
because the gt-1030 want 30w of power can my gpu slot give that much power

On small form factors, 25W usually really means 25W. You can try, but there's significant risk it doesn't work and some risk that you damage (or worse) your motherboard. Given the age of the PC, it's also likely it's BIOS instead of UEFI and you'd have a good chance at trouble with a GT 1030 even without the obstacle of power issues. The basic truth is this an ancient, entry-level office PC, with a form factor that is rarely conductive to upgrades.