I have bought an Geforce 6800Ultra and wonder if my PSU that a have in my Aopen H700B will manage this card. I have read that you should have two separate molex connectors to card but I on my PSU there are two molex on each cable.
I have a 400watt PSU but can it be so importent that I have two molex exclusively for the card.
I don't have two molex that I can exclusively connect to the card.
I have three HDD one DVD burner one AMD Athlon XP 3000+ and a Audigty 2 soundcard. I have seen reviews saying that you should have 480watts PSU but is this really neccesery for a graphicscard?
Do I have to give the card exclusive molex connectors to get this card to work? or can it share power with lets says a HDD or a system fan?
Isn't the same power in all molex connectors regarding if you have one or two units connected to the same cable?

The 6800Ultra is overkill for your system...your CPU isn't powerful enough & will bottleneck the card.

But to answer your question, that card MUST be connected to the PSU or it won't run properly. Either upgrade your PSU, or better yet, set your video card sights a little lower

ASUS A7N8X-X
Athlon XP 1800+
8.5 x 200MHz
1024MB PC3200 2.5-3-3-7
Asus A9550GE/TD 128MB
WinME/WinXP Pro SP1

I didn't meant that I was thinking of not connect the two powercables but what I wonder if I can share the same cable for the card and a systemfan or HDD.
On my PSU there are as I said two molex on one cable.
As regarding overkill of using a ultra card I can't agree that this is overkill becourse if I want to buy a new CPU then my Ultra card will not be outdated. I don't want to buy a new card everytime I want a new CPU.

You already have an XP3000+...there is only one more step in socket A CPUs & that's the XP3200+ & there's no point in getting it. AGP is slowly being phased out. Your next CPU upgrade will have to come with a new motherboard, & that board will more than likely use PCI-Express video. A new PSU will be required as well because new boards use a 24-pin main power connector.

There are plenty of decent cards out there that don't have to be connected to the PSU & are better suited to your current system specs.

ASUS A7N8X-X
Athlon XP 1800+
8.5 x 200MHz
1024MB PC3200 2.5-3-3-7
Asus A9550GE/TD 128MB
WinME/WinXP Pro SP1

You didn't answer my question about if I can connect two devices on the same cable when running 6800Ultra.
My PSU has 24pins but I am using a converter to fit older moderboards.
I don't think that PCI-Express will erase AGP for a year or two but that was not my question.
I have bought a 6800Ultra and now I have a question about cables.

A fan draws very little current, so it should be alright to share with it.

Can I connect both power connectors from the same cable also or dosen't the card get enough power.
What happens If I connect like I wrote above, will there be to little power?
Isn't 400watts overall on a PSU with 400Watt so all connectors have the same power.
The most important thing that I can think of isn't that you don't exceed the overall power?

I agree with jam your processor is the bottleneck unles you some how manage you do a nice overclock on it, but of course you will also need some extra cooling as well.

That was not my question if my cpu is slow or not, read my question before answering to it.

400W means nothing if you don't have the amperage to back it up.

How about posting the make/model of your power supply & how many amps are on the +12v rail? If you don't have enough amperage, it really won't matter how you connect it to your power-hungry card. You already have a huge drain on the +12v because of the CPU & 3 HDDs...not to mention the burner & any cooling fans. The added draw from the video card may push it over the edge.

ASUS A7N8X-X
Athlon XP 1800+
8.5 x 200MHz
1024MB PC3200 2.5-3-3-7
Asus A9550GE/TD 128MB
WinME/WinXP Pro SP1

As I said above Stefan, you probably can connect the card along with a fan on the same cable, because the fan draws very little current. Connecting it along with a hard drive or CD drive might not be a good idea.

Here is a review of my PSU
http://www.pcstats.com/articleview.cfm?articleID=1721

I have solved the problem myself, I have asked people that knows.

Regarding power consumtion of fans and burners they are not that power hungry, see this
My spec:
CPU : 70-85watt
Memory : 10watt
DVD-Burner : 25watt
Soundcard : 8watt
Systemfan x5 : 2watt
Graphiccard : 110watt
HDD x3 : 20watt
That is about 308watt overall without motherboard.

That still means nothing as jam stated for the current (amperage) provided for the +12V rail.

Once again, wattage is only one issue when it comes to PSU ratings...amperage is another & amperage is what matters. All you had to do was say, I have a 400W AOpen AO400-12AHN.

"The 12V line is split into two to power the secondary 12V connector, and the two lines can pump out 14 amps and 15 amps respectively". It goes on to say that it "possesses quite a medusa's nest of cables. In addition to the two 12V motherboard connectors, the PSU includes two serial ATA power cables as well as seven Molex connectors and a pair of floppy drive power cables."

You have seven molex connectors! You shouldn't have to share any of them...

ASUS A7N8X-X
Athlon XP 1800+
8.5 x 200MHz
1024MB PC3200 2.5-3-3-7
Asus A9550GE/TD 128MB
WinME/WinXP Pro SP1

Stefan, if you didn't get the right answer, maybe you weren't asking the right question.

how is a 3000+ a bottleneck? still awfully fast compared to some older CPUs...

Argue for your limitations and sure enough, they're yours.

you could underclock you GPU untill you get a new PSU. i'm sure you got a cd with utilites for over and underclocking.

Hp Pavillion a1010n
Asus P4GV-LA Motherboard
Intel Celeron 2.93 GHz
160 Gb Hard Drive
512 pc3200 Mb of Ram
64 Mb Graphics Chip
Windows Xp Home Edition