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pci-e 6 pin to molex 4 pin

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January 24, 2007 1:11:31 AM

i bought a psu with a pci-e connector but my video card used a 4 pin molex, does it possible to change the existing pci-e connector to 4 pin molex configuration? how about the 5v supply for the card (agp)?

has anyone try this before?

thanks

More about : pci pin molex pin

January 24, 2007 1:56:20 AM

thanks for the reply, yes you're right on tucking in the unused pci-e connector , but in order to do so i'm stretching out the supply rail that i used to powered my drives (hard drive & 2 optical drives). i want to create 2 independent supply rail, 1 to support my drives & the other one solely for my 9800pro.

the problem is, the psu that i bought does have an independent rail for graphic card but in pci-e connector but the ordinary 4 pin molex.

thanks
January 24, 2007 3:57:31 AM

does the agp card needs the 5 volt? if its not that i'll just cut/change the pci-e to molex connector
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January 31, 2007 2:33:03 AM

my psu is enermax 460w with two pci-e connector but mine is agp. so i need a diagram to make splitter cable.

by the way sorry for my late reply
January 31, 2007 3:38:15 PM

You may have to beat it into him.
February 1, 2007 7:07:33 PM

I beg to difference

I have the same exact problem, using an old enermax 435W + GF6800Ultra I've maxed out my 12V rail.
whenever I change the CPU's volt. from 1.65 onward I get serious drops in my +12V (moblie XP).

at around 1.75 which I use for 2.4GHz I have 11.9 Ideal, prompting Nvidia's messages of "had to reduce graphics card performance do to lack of power" and sometimes freezes. obviously I can't play as as soon as I start a 3d app my comp freeze.
of course when I put 1.65V cpu = ~2.2GHz (can't recall right now, something like that) CPU I have ~12.1V and am able to play without nvidia messages.
furthermore all my instabilities, if any, are from 3D and/or video-card related, and have started, if I recall correctly, after adding a dvd burner to my 2 raptors+1 pata HDs+dvdrom+dvd burner+fan farm rig.

so It seems I need a new PSU, only all correct PSUs come with different +12V rails (2-3-4 usually) divided as CPU, PCI-E (sometimes a couple), and all-peripherals (all other) 12V. meaning I will still lack on +12V as peripherals have around 16-17Amps.

so the only solution would be either a single rail +12V PSU or an adaptor from the 6-pin pci-e to molex.

now how to do that?, it is necessary!

P.S.
there's that TK 250W 12V 5.25" PSU: on newegg (just for example, not connected to them in anyways)
it too has 2Xpci-e 6-pin connectors.
it's relatively cheap and can resolve my problem but for those damn pci-e plugs!

care for a suggestion?
February 1, 2007 11:15:51 PM

but what are the rails? 12v1 connected to what and 12v2 connected to what, that's the problem.

it doesn't do me any good if I have a whole empty pci-e rail(!) to do squat with... incase one of the 12v rails connected solo to the pci-e.

edit:
i've checked your psu101 and follower the eXtreme PSU Calculator v2.0:

Quote:
System Type: Single Processor
Motherboard: Regular - Desktop
CPU: Athlon XP-M 2600+ 2000 MHz Barton
Overclocked: 2400 MHz, 2.75 V
CPU Utilization (TDP): 85% TDP

RAM: 2 Sticks DDR SDRAM
Video Card: NVIDIA GeForce 6800 Ultra
Video Type: Single Card

IDE HDD 7200 rpm: 1 HDD
SCSI HDD 10,000 rpm: 2 HDDs

DVD-ROM Drive: 1 Drive
DVD-RW/DVD+RW Drive: 1 Drive

USB: 2 Devices
Fan Controller: Yes

Fans
Regular: 5 Fans 80mm; 1 Fan 92mm; 1 Fan 120mm;
High Performance: 2 Fans 120mm;

Keyboard and mouse: Yes

PSU Utilization: 100 %

Capacitor Aging (+ W %): 30 %

Total: 668 Watts

if I change the mobo to hi-end it's 685W and I've taken into account in the fan count the two 1*80 and 1*92 psu fans..


P.S.
I'm terribly sorry for the hijack.
February 2, 2007 4:13:46 PM

I'm a thread stealer...

1. the zalman 600 is the same as the ocz 700 you've sugested, should it suffice?

2. how about the ThermalTake 750?

3. the TT 750 have 4 virtual 12V rails, I know the difference between rails and connections obviously, how come I should only look at the total +12V amps and totally disregard the individual rails wiring, what is the mining of indevidualty then?

4. the TT 750 has 16 guage wiring, like you suggested.

5. I can probebly get the TT cheaper (not as cheap as the zalman 600).

and finally:
6. shouldn't it be possible to convert the pci-e 12v on Thermaltake W0099RU ATX12V 250 Watts because it's a lot cheaper, that's what we're all here about, or is there another similar product with mulex.
February 2, 2007 8:43:08 PM

Quote:
I beg to difference

I have the same exact problem, using an old enermax 435W + GF6800Ultra I've maxed out my 12V rail.
whenever I change the CPU's volt. from 1.65 onward I get serious drops in my +12V (moblie XP).

at around 1.75 which I use for 2.4GHz I have 11.9 Ideal, prompting Nvidia's messages of "had to reduce graphics card performance do to lack of power" and sometimes freezes. obviously I can't play as as soon as I start a 3d app my comp freeze.
of course when I put 1.65V cpu = ~2.2GHz (can't recall right now, something like that) CPU I have ~12.1V and am able to play without nvidia messages.
furthermore all my instabilities, if any, are from 3D and/or video-card related, and have started, if I recall correctly, after adding a dvd burner to my 2 raptors+1 pata HDs+dvdrom+dvd burner+fan farm rig.

so It seems I need a new PSU, only all correct PSUs come with different +12V rails (2-3-4 usually) divided as CPU, PCI-E (sometimes a couple), and all-peripherals (all other) 12V. meaning I will still lack on +12V as peripherals have around 16-17Amps.

so the only solution would be either a single rail +12V PSU or an adaptor from the 6-pin pci-e to molex.

now how to do that?, it is necessary!

P.S.
there's that TK 250W 12V 5.25" PSU: on newegg (just for example, not connected to them in anyways)
it too has 2Xpci-e 6-pin connectors.
it's relatively cheap and can resolve my problem but for those damn pci-e plugs!

care for a suggestion?


He/you need to replace the PSU. I just switched out my Enermax 600W on Tuesday to an Antec TRuePower 650W Trio. My prob was that I couldn't OC my E6600 to 3.6 ghz with my 7800 GTX card in it. As soon as I tried to run Counter Strike Source, it would reset the comp. I was overloading one of the rails, or it was just on it's way out. Regardless, the Antec has it running fine @ 3.6 ghz.

Blow your stuff up trying to perform surgery, or just get the right part 8)
February 25, 2007 3:44:43 PM

I have similar problem and am wondering if it is safe to mod the pci-e connector like he suggested as I am not buying a new psu i jut got this one.

I will buy a new system eventually but i do not have money now. I have

athlon xp 3000+ barton
asus a7n8x-e
1GB 512x2 kingston bh-5
geforce 5900
3hd 1 dvd

my old psu was an antec 350w(18A 12V). which i had my system clocked at 2300mhz. It is now broken from abuse (long story)

new psu-- antec 430w dual 12v(16Ax2 i think). cannot raise over stock core voltage(system will shut off as soon as any game starts or even booting windows). it is for sure the psu. i should've got the 500w single rail but i didnt and im not spending any more money on this old thing.

so can i just cut the wires and put on a molex, if its not going to fry my s*** im doing it. thanks 4 the help
February 25, 2007 5:50:13 PM

"Generally the CPU and motherboard power connectors are attached to one +12v rail while the PCI-e and molex are on the other. Now this isn't always the case. It will very widly from one manufacture to another."

So if its not the case and my pci-e is the only thing on the 12V2 then my 430w psu is worse than the 350 i had before. or is it never like that?

my exact psu is an antec earthwatts 430w. after reading the best psu lists tho maybe i don't care so much about this whole thing. ill be sure to get one of those for my new system. thanks for the info man.
March 2, 2007 5:24:58 AM

i'll just stick to the original plan (do not mod the existing pci-e)

thanks
August 11, 2007 5:20:45 PM

Quote:
I just switched out my Enermax 600W on Tuesday to an Antec TRuePower 650W Trio. My prob was that I couldn't OC my E6600 to 3.6 ghz with my 7800 GTX card in it. As soon as I tried to run Counter Strike Source, it would reset the comp. I was overloading one of the rails, or it was just on it's way out. Regardless, the Antec has it running fine @ 3.6 ghz.


Im in a similar situation to the above



Ive just brought a ANTEC truepower Trio TP3-650 made up of three rails, rail 1 and 2 are for HDD, CD ROMS Mainboard / Fans etc, the 3rd rail is for two PCI-E Cards.......

Ive got a AGP Card, so i cant use this Rail to power my card, and rail 1 and 2 , theres no juice left to keep my machine stable.

Ive had to decrease my CPU clock to stop the PC resetting.... i want to use this rail, so i can get the PC back upto speed....


ANY one got a wireing diagram for the PCI-e Plug from the PSU, so i can make an adaptor or where i can purchase an said item...

The PCIE converter will be needed to be the one to go from the PSU PCIE cable and convert it into a molex plug,

has anyone managed to source one yet....


THX in advance, nice to know there are people in the same situation
!