So my 660W PSU only has like 19A on the 12V rail...so the OS downclocks the video card...Can I just use OC tools to speed back up the card, or do I actually need the 22A 12V rail, and not my quad 19A 12V rail?
8800GT :( I have a 660W Quad rail PSU, and it doesn't power the 800GT says not enough amps on the 12V rail :(
- Thread starter superHARD
- Start date
The OS does not know or care what the label of your PSU says or the power requirements of your video card.
sounds like you have a $30 600w psu. i know good 400w psu's that can run the 8800gt. thats why i hate when people think they need 600w. they dont most of the time.
It knows it is not getting the 22A on the 12V rail... I AM getting the errors...they are not coming from no where...
n7
Elite Member
- Jan 4, 2004
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No offense, but 19A is more than fine to run an 8800 Ultra, nevermind your 8800 GT.
You've got something else wrong.
Please explain what you mean, since again, the OS is NOT downclocking your card, & neither is 19A inadequate, unless total combined amperage is something ridiculously low.
Post your system specs as well pls.
You've got something else wrong.
Please explain what you mean, since again, the OS is NOT downclocking your card, & neither is 19A inadequate, unless total combined amperage is something ridiculously low.
Post your system specs as well pls.
n7
Elite Member
- Jan 4, 2004
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Hmm, seems like that PSU has more than enough power.
I do not like how they laid out the +12V rails distribution though.
+12V1 - CPU Power 8pin connector (pin 5&6)
+12V2 - CPU Power 8pin connector (pin 7&8), PCI-Express 6pins power
+12V3 - Main Board 24Pins
+12V4 - All Molex Peripherals (HDD and FDD)
Just an idea (even though i doubt this is going to do anything), you could switch which 4 or 8-pin connector you are using for the CPU to the other one just in case.
And what "errors"
I do not like how they laid out the +12V rails distribution though.
+12V1 - CPU Power 8pin connector (pin 5&6)
+12V2 - CPU Power 8pin connector (pin 7&8), PCI-Express 6pins power
+12V3 - Main Board 24Pins
+12V4 - All Molex Peripherals (HDD and FDD)
Just an idea (even though i doubt this is going to do anything), you could switch which 4 or 8-pin connector you are using for the CPU to the other one just in case.
And what "errors"
Food for thought... If you go to NewEgg and lookup the Antec TPQ 850 you will find that the MFG stated in their responce that their PSU has compatability issues with the 8800GTX. It did not affect any other card (including the Ultra). They were working on a fix for it. Same exact issue it appears you are running into, just a different PSU and Graphics. Just food for thought... Antec stated publicly that the PSU has MORE Than enough power to run an 8800GTX. So, the issue is an anomoly, could be the same thing you are running into.
Capt Caveman
Lifer
- Jan 30, 2005
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When I jumper over one of my PSU's that has 22A on the 12V line, and plug the psu into the video card, I don't get the error.
The problem IS not having 22A on the 12V line...so back to my question, can I just OC the 8800GT with the 18A that the card gets from my psu?
The problem IS not having 22A on the 12V line...so back to my question, can I just OC the 8800GT with the 18A that the card gets from my psu?
He can power it, but unless he overriding the OS downclocking his card, he is running it at like 1/3 power
n7
Elite Member
- Jan 4, 2004
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Since i'm off to work, can someone else explain to superHARD how the +12v rail distribution works, since he's not getting it.
BTW, to somewhat explain what i'm trying to say: http://www.anandtech.com/video/showdoc.aspx?i=3140&p=13
Total SYSTEM power comsumption...
Notice the 8800 GT system: 209W max under load...
OP, just one of your +12V rails can do 228W by itself!
BTW, to somewhat explain what i'm trying to say: http://www.anandtech.com/video/showdoc.aspx?i=3140&p=13
Total SYSTEM power comsumption...
Notice the 8800 GT system: 209W max under load...
OP, just one of your +12V rails can do 228W by itself!
http://www.newegg.com/Product/...x?Item=N82E16817371010
"+3.3V@24A,+5V@24A,+12V1@19A,+12V2@19A,
+12V3@19A, -12V@0.8A,+5VSB@3.0A"
Antec NeoPower 650 Blue ATX12V / EPS12V 650W Power Supply
$139.99
Tell that to my video card
I understand...explain how I can plug in a OLD POS video card that has teh 22A 12V rail just to the video card, and it works just fine?!
Capt Caveman
Lifer
- Jan 30, 2005
- 34,543
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Originally posted by: superHARD
He can power it, but unless he overriding the OS downclocking his card, he is running it at like 1/3 power
Nope, he actually has the card overclocked - http://www.ocforums.com/showth...311&highlight=250w+psu
ManWithNoName
Senior member
- Oct 19, 2007
- 396
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Little confused. Do you have the Quad-Rail Enermax 660w you first linked to or the Tri-Rail Antec 650w that you linked to later?
Anyway, I just found your power supply label from the last link you posted....
http://www.ozhardware.com.au/P...ower-Specs-and-Te.html
.....and it appears you have anywhere from 37a to 52a of sustained/continuous amperage on your combined +12v rails depending on how much wattage is being utilized on your +5v and +3.3v rails. This should be more than enough for your 8800GT as N7 said, unless the power supply is damaged. As far as the 8800GT goes, you only need 22a of sustained/continuous power on the combined +12v rails for multi-rail units like yours, or 22a on a single +12v rail for a single-rail power supply which yours is not. Your confusion lies in how EVGA for example lists their specs, they just said 22a on the +12v rail and left off the combined rails for multi-rail units part. Also as N7 says, this figure is for total system power, not just for the 8800GT by itself.
Also, as ArchAngel suggested you may also have the firmware issue with your power supply that has affected some 8800GTX users. I have also seen this same issue "appear" to effect some 8800GT users as well so you may want to consider swapping power supplies or puting your card in another system for testing.
Did you ever decide if your PSU is the Enermax or Antec models you linked to?
The OS is not detecting any problem with your card's power. The card and driver are detecting problems with your card's power.
The enermax
I know it is from the video card drivers...but the was I described it was just so ppl would know what I am talking about...
I know it is from the video card drivers...but the was I described it was just so ppl would know what I am talking about...
Originally posted by: superHARD
He can power it, but unless he overriding the OS downclocking his card, he is running it at like 1/3 power
Incorrect. Im also running my 8800GT overclocked on my 300w PSU with zero issues.
taltamir
Lifer
- Mar 21, 2004
- 13,576
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From my experience if a video card doesn't have enough power it CRASHES... if you haven't plugged in the extra power connecter on the video card, only THEN does it TELL you it doesn't have enough power.
Now maybe there is some awesome new power amount detecting mechanism in the 8800GT... but just in case please make sure you didn't miss any power connector.
You should have one in the video card itself, and possibly on in the motherboard right next to the video card (in addition to the big motherboard plug and the secondary CPU power plug)
Now maybe there is some awesome new power amount detecting mechanism in the 8800GT... but just in case please make sure you didn't miss any power connector.
You should have one in the video card itself, and possibly on in the motherboard right next to the video card (in addition to the big motherboard plug and the secondary CPU power plug)
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