Non compatible PSU? Is that even possible?

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dalsim007

Honorable
Nov 25, 2014
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10,510
Hey,

My computer started to shutdown on graphics heavy games, so I checked drivers, then did some furmark test. And computer shuts down after 2-3 min of test. I get black screen, log says temp is less than 80 degrees (6970 2gb btw).

So I am pretty sure the PSU is to blame... Its is 4 years old anyway...

I am using a OCZ modXtream PRO 700w.

Heading to futureshop....

Grab a Thermaltake smart series 850W. Hook it up, no boot... Weird...
Retest with the OCZ... it works...
Back to Futureshop and exchange for a another one... NO BOOT again! WTF...
Retest again the OCZ... it works!
Back to Futureshop and try another model, Thermaltake thoughpower GRAND 1050w... Hook it up, STILL NO BOOT WTF BBQ!

There is a slight buzz sound for half a second, but nothing powers-up...

Is there such a thing as a non-compatible PSU? Have thinks changed this much in 4 years?

Rig:
Intel i7 860
Gigabyte P-55-UD4P
AMD 6970 2gb with arctic cooling fans
8 gb RAM (4gb X 4 GSKILL RIPJAW)
SAMSUNG EVO 840 1tb SSD

Any help is soooo appreciated!
 
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plywrlw

plywrlw

Admirable
Jul 5, 2014
2,811
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7,960
No, the Thermaltake PSU's should be OK. Either you are connecting it wrong, you need to try a different shop or something else is wrong with your setup.

Some thermaltake PSUs aren't very good by the way, does your shop have any other brands like xfx or Seasonic? Antec have some good units too and the EVGA Supernova B2 and G2 PSU's are excellent.

Read the PSU manual, check all your connection including the 4 or 8 pin eps by the CPU. Try removing the GPU and boot it without.

Its possible you have a short circuit that's stopping the newer PSU's working as they are trying to protect you and your PC whilst the older OCZ isn't tripping out. Check there's nothing like a screw or other piece of metal fallen behind your motherboard

Just a few suggestions!
 
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synphul

synphul

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Mar 11, 2011
9,477
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54,965
It sounds like you may be encountering another issue. Were these thermaltakes tried in your pc at home or at the store? If the same outlet as you normally use (or power strip) you may check that. Try plugging your pc directly into a wall outlet and avoid the powerstrip if you use one (at least for the time being to eliminate it from the equation as a potential problem).

Maybe there's an issue with the power on the motherboard? Although not sure why the ocz would work and the thermaltake didn't. I have another machine using an ocz mod x stream and no issues - I think the internals are actually FSP. OCZ doesn't make their own psu's. You said yours is a mod x stream pro and from what I gather it's internals are Sirtec. Never heard of them but that doesn't mean anything. Usually those mod x streams are good psu's.

You shouldn't need an 850w psu, just running one gpu, 8gb of ram etc even a decent working 600-650w would suffice I'd think.

Have you checked all your power cables at the motherboard to make sure they're seated well? No pinched wires or anything to create some sort of short? A circuit trace on the motherboard could have gotten weak or failed causing an issue, maybe something in the thermaltakes are causing them to shut down for safety reasons? There are rare cases (really rare) where the electronics in a psu just don't play nicely with vrm's or something on a motherboard. Other than that, they should be pretty universal. The only exception being what cable options they have for powering the motherboard, gpu etc.
 
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dalsim007

Honorable
Nov 25, 2014
7
0
10,510
My only local shop where I buy parts and freely return them is Futureshop and the only thing they carry is Thermaltake as "proper name brands". Anything else is generic and lower than 500w.

I have plugged the PSU directly on the wall to eliminate the powerbar. I even use the 2 PSU together (OCZ on the MB and CPU and Thermaltake for the rest (preripherals and GPU) and I would still only get power from the OCZ (MB beeping it doesnt detect GPU or HDD),

I am so puzzled. As someone suggested, I will undo all cables and redo them, maybe slot the GPU in my other PCI-E slot. I would be suprised the OCZ woulnt pickup a short and the Thermaltake would.

 
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synphul

synphul

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Mar 11, 2011
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This is probably a silly question, but since you're in the uk I believe you use 240v power there (as opposed to the u.s. where we use 110v home current). Is there a switch on the back of the thermaltake that allows you to select 120v or 240v? Some psu's here have that option, it's a small recessed switch somewhere usually the back of the unit.
 
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