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Temporary solution to a BIG problem! Help

post #1 of 10
Thread Starter 
Alright so I have a SILVERSTONE ST55F-G 550W. It is GOLD rated and 550W continuous. I have an Asus 7970 Direct CU 2, specifically the HD7970-DC2T-3GD5. This card requires 2 8 pins. My power supply only has one 6+2 pin and one 6 pin. They come from a single outlet on the power supply. There is another one but the power supply did not come with a cable that can use that slot. I just went to Frys to buy one of these http://www.frys.com/product/6969147;jsessionid=Ag9cI8nI6JInDPb2pgm5xw__.node2?site=sr:SEARCH:MAIN_RSLT_PG

The card has both lights green and seems to run good. Drivers installed fine and everything. I tried to run the Windows Assesment as a burn in test, but the system shut down, rebooted, and a little message in the BIOS said that Asus detected a power surge and shut of the computer to protect it. My guess is that the molex line that I am using with the adapter does not provide enough juice, and when it ran the test, it pulled more juice than the power supply could from that line.
So I need ideas to fix the problem. I am pretty sure the power supply can handle it. I might be able to buy cables from Silverstone themselves but that will have to wait 'till monday. Any suggestions are welcome, oh and also help on that shutdown. It scared me, and I began to think that the card was faulty.

Other things that will be running with the computer are
Asus Z77 ITX DELUXE, 3570k. and Mushkin 2133 Ram. 24 Pin and 8 Pin

One ssd, two conventional hardrives. SATA LINE

Molex line right now has

H100, BItfenix Recon, And 4 fans. The little connector i bought....

PCI line has one line connected to the video card...
post #2 of 10
It is a single rail PSU it shouldn't matter where the molex pci power adapter is plugged in
you could try downclock GPU to 950Mhz
You are probably pushing the limits with a DC2T and that PSU
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kamikaze
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post #3 of 10
Thread Starter 
Quote:
Originally Posted by feznz View Post

It is a single rail PSU it shouldn't matter where the molex pci power adapter is plugged in
you could try downclock GPU to 950Mhz
You are probably pushing the limits with a DC2T and that PSU

I dont't really understand how that works tongue.gif but i know this adapter is wired a little weird

There is one molex with 3 pins and one wired with two. I wouldn't be surprised if this this adapter didnt provide enough juice. The dct2 pushes 425w in benchmarks with a similar setup so it might just be the adaptor. Or maybe the power supply is going out. I ordered a silverstone sleeved cable that i can connect directly to the power supply. Hopefully that will do it smile.gif
post #4 of 10
at load a 3570k can pull 160 watts so that power supply seems a little small for your needs.
    
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post #5 of 10
Quote:
Originally Posted by zerocool135 View Post

at load a 3570k can pull 160 watts so that power supply seems a little small for your needs.

Is that a OCZ ModXtreme 700 you have there?
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Seravee
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post #6 of 10
Ya why?
    
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post #7 of 10
Quote:
Originally Posted by zerocool135 View Post

at load a 3570k can pull 160 watts so that power supply seems a little small for your needs.

Nah 550W should be more then enough. The issue is most likely the molex to PCI adapter. You should not use thous if there is any other option. Molex lines are rated for max 65W, the PCI 6-pin is max 75W and PCI 8-pins max out at 150W.

Even if the PSU is single rail using the molex to PCI is a bad idea. If you really only need the 65W then its OK but draw more and you can trigger short circuity protections or even melt cables.

In this situation I would suggest using a PCI 6-pin to 8-pin adapter. The 300W (75W motherboard + 75W 6-pin + 150W 8-pin) should be enough to run a 7970 without issues even allowing for some OC'ing.


Edited by Bit_reaper - 5/13/13 at 8:23am
    
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post #8 of 10
Quote:
Originally Posted by zerocool135 View Post

Ya why?

Thats why
http://www.hardocp.com/article/2008/11/12/ocz_700w_modxstream_pro_power_supply/
Warning: Spoiler! (Click to show)
Build Quality

Externally the OCZ 700W ModXStream Pro is a fairly subdued semi-modular design that looks good. The unit has a nice finish, well sleeved cables, good quality modular cables, and a large overhead fan. However, once we open the unit we find that OCZ 700W ModXStream Pro looks very much like a cheap group regulated unit. This is further compounded by the fact that the unit has some questionable component selections in the mystery "Rec" capacitors. Good capacitors only add slightly to the total cost of a unit so why even something along the lines of Samxon or at the very least Teapo was excluded from this build is bewildering. Further, the unit only features a 3 year warranty and with questionable capacitors this is hardly reassuring. Also related here is the unit’s "documentation." The documentation that came with the unit is simply a waste of time. This fact is punctuated by the power distribution table at the back of the manual was never actually finished by whomever was annotating it. The only upside to all of this is most of the information about the unit is printed on the packaging, but still sans a correct power distribution table as these are genuinely useful. They are especially useful when units do not follow the ATX12v specification or EPS specification for 12v power distribution such as this unit.
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Seravee
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post #9 of 10
Quote:
Originally Posted by shilka View Post

Quote:
Originally Posted by zerocool135 View Post

Ya why?

Thats why
http://www.hardocp.com/article/2008/11/12/ocz_700w_modxstream_pro_power_supply/
Warning: Spoiler! (Click to show)
Build Quality

Externally the OCZ 700W ModXStream Pro is a fairly subdued semi-modular design that looks good. The unit has a nice finish, well sleeved cables, good quality modular cables, and a large overhead fan. However, once we open the unit we find that OCZ 700W ModXStream Pro looks very much like a cheap group regulated unit. This is further compounded by the fact that the unit has some questionable component selections in the mystery "Rec" capacitors. Good capacitors only add slightly to the total cost of a unit so why even something along the lines of Samxon or at the very least Teapo was excluded from this build is bewildering. Further, the unit only features a 3 year warranty and with questionable capacitors this is hardly reassuring. Also related here is the unit’s "documentation." The documentation that came with the unit is simply a waste of time. This fact is punctuated by the power distribution table at the back of the manual was never actually finished by whomever was annotating it. The only upside to all of this is most of the information about the unit is printed on the packaging, but still sans a correct power distribution table as these are genuinely useful. They are especially useful when units do not follow the ATX12v specification or EPS specification for 12v power distribution such as this unit.

I was in a bind and got it for a good deal, didnt know as much about PS as i do now but i still need to learn more.
    
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post #10 of 10
Quote:
Originally Posted by zerocool135 View Post

I was in a bind and got it for a good deal, didnt know as much about PS as i do now but i still need to learn more.

Its not the worst thing in the world but its not very good either

Hope you did not get insulted or anything the last few times i talked about the Mod XStream Pro they would go crazy over me pointing out its not very good

Anyway back on topic
Seravee
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Seravee
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Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
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Onkyo TX NR646  Harman Kardon HKTS 60 Dali Opticon Vokal x2 Dali Opticon 2 
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