8800GT Problem

[soyoDragon]

Hi guys/girls

I got two new 8800GT on wed's everything was fine until tonight the Nvidia control panel keeps popping up saying I don’t have the power to power them and is turning down the cards to stop them been damaged can anybody help me out is it a driver issue ? I would have thought an Antec Quattro 850W would have been fine

My Spec is

Intel C2D E6750
Abit Fatal1ty FP-IN9 SLi
OCZ 2GB (2 x 1GB) PC2-8500 1066MHz SLI-Ready Edition Dual Channel DDR2
Two in SLi OcUK GeForce 8800 GT 512MB GDDR3 HDTV/Dual DVI
Antec Quattro 850W PSU (Nvidia site says it will power Two 8800 GTX so that should be enough)
NEC AD7170A 18x18 DVD±RW Dual Layer ReWriter
PLEXTOR PX-WA4012A CDR
Western Digital Caviar SE16 320GB SATA-II 16MB

 

[BillytheImpaler]

Are they GTs, as in the title, or GTSes, as in your post?

 

[soyoDragon]

sorry

there are OcUK GeForce 8800 GT 512MB GDDR3 HDTV/Dual DVI i copyed the wrong one

 

[BillytheImpaler]

Hmm, have you tried reinstalling the drivers? Have you tried it with just one card?

 

[soyoDragon]

Its fine with one card no prooblem and its all so fine if change the PCIE power cables round from one card to the other for one boot but if you shut down and restart it pops back up :S havent reinstall drivers yet

 

[BillytheImpaler]

This might be a stupid question, but are all the requisite power connectors in place?

 

[Skeeter]

Could this possibly be the first instance of PCIe 2.0 requirements showing? the GT only has a single PCIe power connector.... could it require a PCIe 2 board to provide the required power for SLi?

 

[steve258]

I think it could be that the primary PCI-E is 1.1 and has better compatibility than the 2nd PCI-E slot which is 1.0a. Do you have the same problem when you only install 1 8800GT?

My mobo has the same chipset and the ASUS support says the second PCI-E 1.0a slot might have problem supporting PCI-E 2.0.

 

[fornowagain]

Could this possibly be the first instance of PCIe 2.0 requirements showing? the GT only has a single PCIe power connector.... could it require a PCIe 2 board to provide the required power for SLi?

Doubt its raw power, the TDP is about 110W. The 1.0a slot + PCIe 6 pin is at least 150W.

 

[Big.Wayne]

Doesn't Work!

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

 

[sosrandom]

You have both cards powered? and sometimes theres an extra 4pin molex on the mobo for SLI (At least I know I need the 2x6-pin plugs on the cards, then the extra 4-pin plugged into the mobo to provide the extra power)

It doesnt sound like a PSU issue, and a 1000w should me more than enough (550W does it for me), the extra card should only draw another 100W, 110W MAX

But Ive never encountered the Antech problem before

 

[Pooh]

follow the link on Big Waynes post and have read...