People considering Zebby 540 Modular PSU

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^ 20A + 20A is kinda unattainable in the case of the 640W zebby since the Max total output power for both 12V lines is limited to 300W i.e. 25A. The 540W too has it limited to 250W i.e. 20A.

In comparison, the SP 2.0 500W has 17A + 19A and has a max output power of 300W too in case the 3.3v and 5v lines are at their max output power (180W). If not, you have all the way up to the 400+ W potentially for the 12V lines (480W max output power is assigned for the 3.3v, 5v, 12v lines).
 
yeah Funky is right... with 20A on both 12V rail....your chances of great overclocks increases...well sorry for my banter of OCing...the thing is better fed PC Components are going to do better only. :)

540w one looks so off...I will stay away from it. My Silverstone Zeus 520 has somewhat better rating of 16A & 15A on 12V 1&2, 3.3V is 40A and 5V is 45A.

EDIT:

I dont know about 640w achiving those figures as I checked Zeus 650 it had 42A/504W(Peak : 45A/540W) for total of 3 12V rails. Eddy has a point.
 
funkymonkey said:
did u read this??

http://www.techenclave.com/forums/340406-post13.html
:P
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Yes i did read that funky...What i meant by full load was whether you had tried loading it to the max amps it supports on each rail and not just running some stress test like prime95 on a power hungry rig.

For example load the +12V rail to 20A (if thats the max) and the +5V and +3.3V to their printed limits and check for fluctuations and failures. PSU's often cant handle such tests and fail/shutdown. This will also stress the cooling system of the PSU. Most of the good reviewers do this.

Cross-loading is also another common test especially for high wattage PSU's - loading high amps on the +5V and low amps on the +12V often causes PSU voltages to jump wildly. Very few of the reviewers do this.

Hey Funky can you measure the currents at load and idle states of your computer? I hope the readings in the other post were from a multimeter :)

Raghu.
 
Raghunandan said:
For example load the +12V rail to 20A (if thats the max) and the +5V and +3.3V to their printed limits and check for fluctuations and failures. PSU's often cant handle such tests and fail/shutdown. This will also stress the cooling system of the PSU. Most of the good reviewers do this.
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To load the rails completely you would need the help of a unit with high precision resistive banks (something like what Silent PC Review use) - which tend to be pretty expensive ;) . Hence out of the league of people doing average testing on a PSU.
 
Crazy_Eddy said:
To load the rails completely you would need the help of a unit with high precision resistive banks (something like what Silent PC Review use) - which tend to be pretty expensive ;) . Hence out of the league of people doing average testing on a PSU.
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exactly, i wont go through that kind of trouble even for reviewing purpose :P

All i can do is bench my processor at 3ghz with Prime, hotcpu , rthdribl or 3dmark05 loop.
the other thing i am gona try in couple of days is 7800GT SLI.
one of my friend is buying 7800GT. SO will give 7800GT sli a shot for few minutes for testing purpose.
I know running sli without bridge wont be 100% effecient but it still works.
That should be enough for any high end PC load senario for day to day use.
I mean not many pc will have even as much load as my system.
And i dont trust the software sensors. I have DMM and thats what i use.
 
DMM is the way to go funky :)

Im thinking of constructing the resistor banks - its cheap but ghetto!! Not very high precision is required because even if we load to 19.5A instead of 20A being the maximum we can have a pretty good test. One of the reviewers even had written how he wired everything together....remember reading it with great interest. Maybe we could all pool in and make one...

Hey eddy, does it have any reviews on the net where they have loaded it to the max.?

Raghu.
 
Anish said:
@ Eddy - Is there really a Smart Power 2.0 500W for 5k :huh: ??
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Got the Smart Power 2.0 500W for 4950 /-.(Got it without the box as a OEM.)

Got it at that price after taking the Antec PlusView II casing.
 
^^ Well I thought as much that its an OEM. Thanks for the clarification..:)

though I'd rather spend 500 bux more and get the 640 ;)
 
funkymonkey said:
thats the reason i went in for 640 directly insted of 540.
1K premium was ok for me to go in for 640.
The thing i love about this PSU is the 12v line stability. it has never, i mean never under any condition has gone below 12.0volts. be it stock, massively overclocked cpu/gpu under full load.
Actiually none fo the voltage lines have veried from their stated values.
No fluctuations under full load.
And its silent. The PSU fans are thermally controlled. They dont kick in till temp reaches 40C.

The 640 is still good 2K cheaper than TP II 550.
I would rather advice to go in for Zebronics 640 rather than 540.
I have my doubts about the support for ventec in indian also its not modular and i am not ready to fork out premium for TP II.
I am getting very good PSU for considerablely cheaper price and TP II 500. And thats what made me buy this and I am sure from what i have experienced that this PSU will last me for a while. And Zebronics has decent support all over india if i need it in future.

The other alternative is Antec Smartpower 2.0 500.
Problem is only blade got it here and that was a pull out of some cabinet and not retail product. I am unable to find SP 500 here. Thats also modular. I dont know what its pricing are.
And oh btw those are wrong ratings for 540 watt.
it has 18 and 16 amps resp on +12v1 and+12v2
Click to expand...
I was wondering about that..what with the wattage matching...etc HTH could there be such a difference:P
 
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