nVidia 8800GT + Antec Quattro PSU = Lack Of Power!

Mekrel · 3 Nov 2007 at 11:40

Why have you got a 1000w power supply?

Going by power supply efficiency curves, if you don't put substantial percentage of total load on a power supply, they run at a lower efficiency.

A quad core system, with 8800GTX SLi pulls about 600w...

sosrandom · 3 Nov 2007 at 11:43

not to mension the excess hest generated when running at lower efficiency, for a single card solution I cant see people needing more than my old 550W

neocon · 3 Nov 2007 at 11:45

interesting ...i'm using a 400w antec psu

easyrider · 3 Nov 2007 at 12:26

I was close to buying the Quadro 1000 as an upgrade from my Enermax 620W. :eek:

LoadsaMoney · 3 Nov 2007 at 12:29

Jesus ive heard of overkill, but underkill, ouch.

Hope you get it sorted soon.

sosrandom · 3 Nov 2007 at 13:10

it would be nice if you could tell with software, what your psu is drawing, good idea for the future maybe. Thats some free advice right there mobo and psu manufactures.

Nullvoid · 3 Nov 2007 at 13:45

Didn't Antec have similar problems when their NeoHE PSUs first got released? Not working with certain motherboards and suchlike...

sosrandom · 3 Nov 2007 at 13:51

Yeah, there were problems with the NeoHD, I was going to by one when they came out but went for something else

RaiderX · 3 Nov 2007 at 13:52

if your gonna get a different PSU, get an enermax or PC P&C, the Corsair are stable PSUs but the cables are badly made, the connectors break easilly

sargatanas · 3 Nov 2007 at 14:12

If it can power a 2900 is CLEARLY has the power for an 8800, just something is causing roblems between the 2.

J.D · 3 Nov 2007 at 14:31

sargatanas said:
If it can power a 2900 is CLEARLY has the power for an 8800, just something is causing roblems between the 2.

It's something to do with Nvidia and 8800GTX's and 8800GT's. It's in the first post.

http://forums.overclockers.co.uk/showpost.php?p=10408472&postcount=1

Flying Gribble · 3 Nov 2007 at 15:19

J.D said:
Pairing with a 8800GT by any chance?.

Not at the moment, but perhaps when my monitor is upgraded. Just checked and mine is the Rev 3 (bought from OCuk 1 month ago), so it looks like I'll be OK if and when I do try it.

maddness · 3 Nov 2007 at 15:26

mines a rev 3 and still causing problems

soyoDragon · 3 Nov 2007 at 15:27

<maddness> said:
well mine is a rev 3 lol

ive just checked mine now i got home and my quattro 850w is Rev3 and i got the same problem as you and big.wayne

Flying Gribble · 3 Nov 2007 at 17:10

soyoDragon said:
ive just checked mine now i got home and my quattro 850w is Rev3 and i got the same problem as you and big.wayne

Do you get the Power message or just the low perfoirmance? From the overclock thread it seems to be firmware related. Are you all using Inno3D cards?

maddness · 3 Nov 2007 at 17:12

soyoDragon said:
ive just checked mine now i got home and my quattro 850w is Rev3 and i got the same problem as you and big.wayne

deffinatly the psu mate, see my thread, tried another cheap generic psu and it works a charm

soyoDragon · 3 Nov 2007 at 17:30

<maddness> said:
deffinatly the psu mate, see my thread, tried another cheap generic psu and it works a charm

Fab lol ive only just built this system last week as an upgrade anyone know what antec / nvidia are going to do :confused:

do i A.forget the quattro 850w and buy a cheepo one

not the best option to lose a psu that cost that much

or B. wait for a fix ?

helmutcheese · 3 Nov 2007 at 17:35

easyrider said:
I was close to buying the Quadro 1000 as an upgrade from my Enermax 620W.

If thats a modern one dont.

Enermax is one of if not the best brands, the Inifinit's are superb, there is plenty posts about Corsair's blowing up recently and also Antec (I used to use them) had bad caps in past and dodgy 5v rails on Pure Powers, but they now use Seasonic so should be ok.

Big.Wayne · 3 Nov 2007 at 23:44

Big.Wayne said:
Radeon HD 2900XT 512MB

Click image for full results

nVidia 8800GT 512MB

Click image for full results

nVidia 8800GT 512MB

Click image for full results

All sorted now . . . . . phew! :cool:

As you can see I just swapped out the Antec Quattro 1000w for a Corsair HX 620w and everything works great!

Really like the HX PSU, those thin modular leads are pure genius and it is very quite indeed!

Thanks to everyone who gave feedback and suggestions, what would we do without the forums eh!

J.D · 3 Nov 2007 at 23:47

Big.Wayne said:
what would we do without the forums eh!

Breathe more fresh air?.

Glad your up and running

. Now go and get overclocking !!!!!!.