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Psu need more 6pin connectors

post #1 of 9
Thread Starter 
My OCZ ZX 1250w psu only has 6, 6+2 pin connectors and i need 9 for quadfire and mb 6 pin. Also will 1250w be good for max overclock on 4x 7950's and 5ghz 3820 or 3930k
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post #2 of 9
System Type: 1 physical CPU
Motherboard: High End - Server
CPU Socket: Socket LGA 2011
CPU: Intel Core i7-3820 3600 MHz Sandy Bridge-E
Overclocked: 5000 MHz, 1.42 V
CPU Utilization (TDP): 90% TDP
RAM: 4 Sticks DDR3 SDRAM
Video Card 1: AMD Radeon HD 7970
Video Card 2: AMD Radeon HD 7970
Video Card 3: AMD Radeon HD 7970
Video Card 4: AMD Radeon HD 7970
Video Type: Crossfire

Flash SSD: 2 Drives
DVD-RW/DVD+RW Drive: 1 Drive
PCI-e x1 Card: 1 Card
Fan Controller: Yes
Fans
Regular: 4 Fans 120mm;
Water Cooling Kit: Corsair Hydro H100
Keyboard and mouse: Yes
System Load: 90 %

Minimum PSU Wattage: 993 Watts
Recommended Wattage: 1043 Watts

Well that is specked out with 7970s so do you think you will exceed the 7970 TDP? if so your PSU is cutting it close. I would also read a review on how much your PSU tested out with because for example my Ultra X4 1200 only tested out at 1100 or something like that.

You sound pretty legit with that psu though. 1700-1800w to my understanding is the max output you can get on a 15a breaker with voltages between 115-120. So you are in a nice play it safe area where you can max out your PC and hopefully other things in the circuit wont cause a trip... LIKE WINDOW AC UNIT!!!!

This is given that you never hit a total system load of over 90% Meaning benching or folding with all the CPUs and GPUs running at 100% Because then the CPU TDP would be over 90 and the total system usage would be over 90 and you would probably right at that limit of 1200w if it is even available which it is not if your voltage in is less than what the 1200 is rated at which can happen.


Other thing to check as for the review of your PSU is if the thermal shutdown worked.

As for the not enough connecters I have a ton of molex to 6 and molex to 8 adapters. You can buy them at frys.com or tons of other places.

My opinion though is hard wire them in just take the connecters off them and hard wire them in yourself.
Edited by givmedew - 1/22/13 at 11:53pm
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post #3 of 9
Thread Starter 
Quote:
Originally Posted by givmedew View Post

System Type: 1 physical CPU
Motherboard: High End - Server
CPU Socket: Socket LGA 2011
CPU: Intel Core i7-3820 3600 MHz Sandy Bridge-E
Overclocked: 5000 MHz, 1.42 V
CPU Utilization (TDP): 90% TDP
RAM: 4 Sticks DDR3 SDRAM
Video Card 1: AMD Radeon HD 7970
Video Card 2: AMD Radeon HD 7970
Video Card 3: AMD Radeon HD 7970
Video Card 4: AMD Radeon HD 7970
Video Type: Crossfire

Flash SSD: 2 Drives
DVD-RW/DVD+RW Drive: 1 Drive
PCI-e x1 Card: 1 Card
Fan Controller: Yes
Fans
Regular: 4 Fans 120mm;
Water Cooling Kit: Corsair Hydro H100
Keyboard and mouse: Yes
System Load: 90 %

Minimum PSU Wattage: 993 Watts
Recommended Wattage: 1043 Watts

Well that is specked out with 7970s so do you think you will exceed the 7970 TDP? if so your PSU is cutting it close. I would also read a review on how much your PSU tested out with because for example my Ultra X4 1200 only tested out at 1100 or something like that.

You sound pretty legit with that psu though. 1700-1800w to my understanding is the max output you can get on a 15a breaker with voltages between 115-120. So you are in a nice play it safe area where you can max out your PC and hopefully other things in the circuit wont cause a trip... LIKE WINDOW AC UNIT!!!!

This is given that you never hit a total system load of over 90% Meaning benching or folding with all the CPUs and GPUs running at 100% Because then the CPU TDP would be over 90 and the total system usage would be over 90 and you would probably right at that limit of 1200w if it is even available which it is not if your voltage in is less than what the 1200 is rated at which can happen.


Other thing to check as for the review of your PSU is if the thermal shutdown worked.

As for the not enough connecters I have a ton of molex to 6 and molex to 8 adapters. You can buy them at frys.com or tons of other places.

My opinion though is hard wire them in just take the connecters off them and hard wire them in yourself.

good info, i live in the uk so we use 230/240v which Ive heard is different for psu's i could use 6 pin splitters

edit:


Edited by Rbby258 - 1/23/13 at 12:29am
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post #4 of 9
7950s can be power pigs, just 7970s, they allow for consistent overvolting and they overclock like champs (most samples)... so you'll most likely see close to 1.5KW AC draw in synthetics. Not to panic though, DC draw is considerably lower and it won't be a problem for a quality unit like the ZX 1250. However I would not use Molex -> PCIe adapters for such cards and in such a system.

Can you afford a new PSU?.. if so what would be your budget? (you can, of course, sell your current unit to partially offset the cost)
post #5 of 9
Thread Starter 
Quote:
Originally Posted by Original Sin View Post

7950s can be power pigs, just 7970s, they allow for consistent overvolting and they overclock like champs (most samples)... so you'll most likely see close to 1.5KW AC draw in synthetics. Not to panic though, DC draw is considerably lower and it won't be a problem for a quality unit like the ZX 1250. However I would not use Molex -> PCIe adapters for such cards and in such a system.

Can you afford a new PSU?.. if so what would be your budget? (you can, of course, sell your current unit to partially offset the cost)

mhmm i was trying to avoid that as im putting them under water also as well as other upgrades
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post #6 of 9
Quote:
Originally Posted by Original Sin View Post

7950s can be power pigs, just 7970s, they allow for consistent overvolting and they overclock like champs (most samples)... so you'll most likely see close to 1.5KW AC draw in synthetics. Not to panic though, DC draw is considerably lower and it won't be a problem for a quality unit like the ZX 1250. However I would not use Molex -> PCIe adapters for such cards and in such a system.

Can you afford a new PSU?.. if so what would be your budget? (you can, of course, sell your current unit to partially offset the cost)

I agree I would convert it to hard wire which if I am not mistaking would take up that extra 6 pin plus one molex line to do.

The 15a thing def doesn't apply to you either that is def just an american thing. I don't know what amperage breakers you use but if it is 10a or more you would probably never flip it even with a window unit.

I don't know your budget (4) 7950s either mean you have a huge budget or you totally broke your budget. If you can afford a new PSU for such a reason and don't mind dropping the cash on it then go for it. If you don't mind getting your hands dirty and have the tools then pull up a pin out of an 8-pin and re-wire the spare 6-pin to an 8-pin using a molex line for the missing line.

Also like I said I would verify that the thermal protection worked in a review before throwing that load at it if you are going to run the CPU and GPUs maxed at the same time. Because I think your awfully close to the limit.
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post #7 of 9
Thread Starter 
Quote:
Originally Posted by givmedew View Post

I agree I would convert it to hard wire which if I am not mistaking would take up that extra 6 pin plus one molex line to do.

The 15a thing def doesn't apply to you either that is def just an american thing. I don't know what amperage breakers you use but if it is 10a or more you would probably never flip it even with a window unit.

I don't know your budget (4) 7950s either mean you have a huge budget or you totally broke your budget. If you can afford a new PSU for such a reason and don't mind dropping the cash on it then go for it. If you don't mind getting your hands dirty and have the tools then pull up a pin out of an 8-pin and re-wire the spare 6-pin to an 8-pin using a molex line for the missing line.

Also like I said I would verify that the thermal protection worked in a review before throwing that load at it if you are going to run the CPU and GPUs maxed at the same time. Because I think your awfully close to the limit.

I'm missing 3 lines, if I did get a new psu, which one?
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post #8 of 9
Here you go, brilliant unit, 9x PCIe connectors as well.
post #9 of 9
Thread Starter 
Well all the stuffs going to bought over a period of a month or two and slowly added to the build, 2 of my 7950's need to be sold and replaced as there's no blocks for them and now my third 7950 is a different smaller pcb card. When I purchase the 4th card I'll buy a second psu, Evga 750w modular as its cheap and there's no point replacing my psu as its good other than its ran out of 6pins
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