HP oem Motherboard wattage caps, and a 750 watt psu

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Fullmetal_Alchemist

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Mar 23, 2013
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After asking many questions, then finally ordering my parts, then going back online I found that HP puts a wattage cap of 650 watts on all their motherboards. Is this true? Or what? I just received parts for my first build and I planned on using the motherboard from my OEM HP h8-1234. The PSU I ordered is the Corsair CX750M. The PSU claims to be backwards compatible with older systems. But i just do not see why it should be incompatible with the hp motherboard, http://h10025.www1.hp.com/ewfrf/wc/document?docname=c03353629&tmp_task=prodinfoCategory&cc=us&dlc=en&lc=en&product=5231389#N455

Am I really going to buy a whole new motherboard and OS to get this to work? I really do not want to. Is there any way to remove this wattage cap or will I be forced to buy a whole new motherboard and another copy of windows 7?

Or is this cap none existent... But I think not after reading these countless discussions on this site.

Could someone please help me out?
 
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tinmann
What other parts are you planning on using in this build? Different case? What cpu and graphics card? And what are you building for? Gaming or just general use. If this is a gaming build then I say loose the motherboard fast. A new 750 watt power supply implies an upgrade to a bigger gpu. That case is not GTX 6XX friendly. Maybe a AMD 7770 will fit but anything over 8 or 9 inches long is not going to have much ventilation in that case. But a psu will only draw from the wall what your compontents pull. It just means if you needed that much power it would be there.
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tinmann

tinmann

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What other parts are you planning on using in this build? Different case? What cpu and graphics card? And what are you building for? Gaming or just general use. If this is a gaming build then I say loose the motherboard fast. A new 750 watt power supply implies an upgrade to a bigger gpu. That case is not GTX 6XX friendly. Maybe a AMD 7770 will fit but anything over 8 or 9 inches long is not going to have much ventilation in that case. But a psu will only draw from the wall what your compontents pull. It just means if you needed that much power it would be there.
 
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Fullmetal_Alchemist

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Mar 23, 2013
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Sorry I forgot to include the other parts,
Radeon 7870
CM storm scout 2 advanced case
NZXT sentry 2 fan controller
oem cpu fx-6120 am3+
barracuda 1tb hdd 7200 rpm
random dvd/cd drive
mainly for gaming with very distant future plans to go for crossfire

I know this sounds difficult to believe, and I know there is no reason for the 750 watt psu to not be compatible. but after reading so many stories it just is so obvious to me that HP has put some sort of wattage limit on their motherboards. I know it should work (I have spent so many hours research everything I could possibly find about building computers) This is just very confusing to me that even though the PSU can supply up to 750 watts I do not know why the HP computer seems to only accept 600 watts or below.

I am going to put it together this weekend to test this problem even if my GPU has not arrived in the mail yet.
I chose such I high wattage psu to leave room for future upgrades such as an 8 core cpu and maybe crossfire if I feel like it.

Here are links to other peoples problems that I am bound to run into,
http://www.tomshardware.com/answers/id-1626070/attempted-install-psu-turn-turns-turns-repeats.html
http://h30434.www3.hp.com/t5/Desktop-Hardware/Corsair-PSU-upgrade-does-not-post-powers-up-5-seconds-powers/td-p/2215609
http://www.tomshardware.com/forum/285762-28-z400-requires-rewiring-system-board-power

EDIT: I know that the motherboard is terrible its just I am on a very limited budget and was hoping to save some money. I am also aware that I will experience bottle-necking and such
 
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