Hi ppl, I've been buying my computer parts over the past 4 months and just finished getting all the parts together. The last thing i bought was my Palit Geforece 9800gtx graphics card and a Zalman 600-HP. The problem is after connecting everything it wont boot up. My motherboard is the Gigabyte 965P-DS3P and have an Antec 900 case. The connectors on the PSU are quite different to the normal PSU's i've dealt with and i am not sure if the PSU is compatible. In the motherboard manual it says that to only connect the 4 pin pcie_12v connect to the PCIE_12v socket on the mobo if using two graphic cards. So does that mean i don't have to use this socket since i am using one graphic card? Also on the graphic card there is two PCIE 6 pin plug at the top. I only have one PCIE socket on the mobo. I checked this also with another tech and he wasn't sure. Is the graphic card and PSU I have suitable for my mobo? I've emailed tthe manufacturers but they take awhile to answer. Any help would be greatly appreciated Thanks Just a little stuck with this one

You should always use the 20+4 connection if you have a 20+4 psu power connetor, because that 4th pin is reserved for PCI Ex. If your graphics card requires additional power like a 6 pin connector, and nothing is plugged into it, than that's your problem, that and if you don't have the 4th pin connected on the 20+4 main connection to your motherboard either. Your graphics card is draining too much power from the motherboards main power connection, that powers everything else on your motherboard. If your psu doesn't have a 6 pin connector then you can buy a converter for it for 3 dollars. http://www.newegg.com/Product/Produ... Considering you haven't mentioned your specs on your psu, if it doesn't meet the Geforce 9800 series specs in power requirments then the above that i mentioned will be meaningless and you will have to go out and get another psu that meets the Geforce 9800 specs. Geforce 9800 power requirments Minimum 450W PSU. ATX 1.0: 26amp on single 12v+ rail ATX 2.0: 16amp on a dual 12v+ rail

Thanks heaps for the info. Yep i just checked inside my case, the mobo has a 24 pin connection. The psu supplies 20 pin along with the additional 4 pin which are all plugged in. It seems though when i left my 'almost finished pc' when i purchased the psu directly from the technician, he had fiddled with connectors and connected the 6 pin cable from the graphic card to the PCIE_12v socket and didnt connect the 8 pin connector to the 12v_x2 rail. The PCIE_12v connection on the board is for use of crossfire & SLI so no need. Also he dind't connect the PCIE connector from the PSU to the 6 pin on the graphic card. I definitely wont be letting someone else like that handle my PC again. I'm sort of new to dealing with modular psu's and new type of mobos. plus am a new tech to the IT world and been only working with older types of psu's and boards in the past. I agree that the card will drain the board if its not connected. cant believe he didn't have it in as well as the 8 pin connector. I've pretty much got it all connected up but now time to try power it on. In regards to the specs of my PSU, it's 600w. FF is ATX12V 2.2 / EPS 12V and around 84% efficency. SO i'm pretty sure there is more than enough power there. Lastly (Soz to make this long) the Antec 900 case I have says in the manual to connect of course the reset switch, power switch, HDD LED and Power LED connector to the board but i have no Power LED connector from the case. Only have 3 of the others which i find quite strange. Anyways thanks again for the help and will give it a go

You need to have the 24-pin ATX main plug connected to the board along with the square 4-pin (or 8-pin) plug connected to the ATX_12V_2X (behind the printer port). That 4-pin/8-pin plug supplies power to the CPU...the system won't run without it. The 4-pin PCIE_12V (near the 24-pin main ATX) does not need to be connected to the PSU unless you're running two video cards. http://www.gigabyte.com.tw/Products... "And that's the fishing line, because Sharkboy said so!"

Hi, Yes i have already connected the 24-pin ATX main plug from the PSU to the 24-pin on the board. The PSU has two ATX12V CPU 2x2 (4-Pin) power cables named (CPU1) and i have pluged that in the 8 pin ATX_12V_2X. The PC definitely doesn't power up and it's getting quite fustrating. I can't see if i am missing something... I also found out that the Power Led cable from the Antec Case 900 doesn't have one. It's a misprint in their manual. Pretty much in a way they are saying, your power Leds are the blue lights where the fans are when the PC does boot up. I am starting to think that the Power Switch, HDD Switch and Reset Switch connectors are not connected properly. I've looked at the Motherboard book and they have different colors to where the + and - goes to which pin. I have connected the connectors to the right pins but am unsure of the positive and negative since the colored wires from teh Antec casing differ from the specs on the motherboard manual. Perhaps the power switch could be the cause? I do hear a very light spark when connecting the AC power cord back into the PSU but when pushing the power button to turn on, nothing...

You may wanna remove the board from the case & benchtest it. "And that's the fishing line, because Sharkboy said so!"

Hi all, OK i believe i might have pin pointed the problem. First i removed my graphics card to isolate the issue. Tried to power the PC on, still nothing. So i removed the new Zalman ZM600-HP 600W Power Supply, and then took out my known good 500W Power Supply from my old PC that I am currently using and connected it up and guess what, the PC powered on. CPU fan was working fine and so was everything else. Left it on for a good 5 mins. However, I then connected the new PSU to my older PC which has a Asrock P4i65g motherboard and uses a 20 main connector and a ATX 12V_2X2 and it powered the PC up!? What even gets more strange is, when i put the old PSU back in my old PC and then tried to connect my new PSU to my new PC, still didn't kick over. Furthermore, i removed the extra 4pin connector from the 20+4 connection to leave only 20pins in then when tried powering up, the PSU powered! BUT.. it was hardly powering anything else on. The CPU fan was hardly moving. Left it for 5 mins as well. This has totally spun me out. You've got the old 500w PSU that powers up my old and new PC and the new PSU powering up the old PC only. Here is the link to the zalman PSU i'm trying to use http://zalman.com/ENG/product/Produ... Any other suggestions are appreciated Thanks