OCZ StealthXStream 600 W Power Supply Review

[Hardware Secrets Team]

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Title: OCZ StealthXStream 600 W Power Supply Review
URL: http://www.hardwaresecrets.com/article/451

Here is a snippet:
"StealthXStream 600 W from OCZ has a 120-mm fan, is EPS12V-compatible, has two video card power connectors for SLI and CrossFire systems and comes with an extremely attractive price tag in the USA, cos..."

Comments on this article are welcome.

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Hardware Secrets Team
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[Bill Tayson]

I stayed happy for persons who bought this power supply.

Congratulations.
Wonderful anyway

[Silentbob]

I picked up this PSU today since it was on sale. I don't know if it's one bad sample with a broken fan controller, but this PSU is more noisy than the 400W Chieftec that was in there before. I can hear the PSU fan clearly when sitting in front of the computer and when I hold my hand 2-3 feet from the PSU, I can feel the air flow. This did not happen with the Chieftec. I guess I'll have to return this on Monday. I was hoping to get one of the quiet samples, but right now it seems like a bit of a gamble.

[Norway]

Where in the circuit can i solder in a MOV and what spec. would it need ?
Where can I buy some MBRP3045N ? (to solder in instead of MBR2045CT)

One last thing:
I have two off these and I'm going to parallel connect them, is it just to solder some thick wires between the 12v. 5v, 3.3v, -12v, sens cabels and so on ?

Thanks

[Merman]

It would be much easier and safer to just buy a good Surge Suppressor.

Link: Anatomy of Surge Suppressors

Figure 8: Inside a good surge suppressor.

As you can see, this unit doesn’t have one MOV but seven!

I just purchased this for $30 USD:

http://www.apc.com/resource/include/...NT3&tab=models

If you are from Norway this is what they may sell in your country:

http://www.apc.com/resource/include/...u=PF8VNT3%2DGR

[hoomever]

Just wondering: your room temperature was 48.6 degrees Celsius - almost 120 degrees Fahrenheit. Is this correct? Just wondering if your temperature measurements were correct.

[HomeUsr]

I think the air inside the case and close to the motherboard sensor was 120 Fahrenheit, or could have been that hot.

I bought this power supply, and it was worth the $40. I also have the blue-fan 700 watt version (GameXStream 700w), that cost me $70. The $40 has a quiet fan, but the board puts out a super-high-pitched whine that changes depending on the load on the 5v line.

The whine is even present when just the 5vsb power is in use (and fan is not running). Using the hard power switch ends the whine. All system components are the same, as I only switched power supplies.

FYI: this may make the system not a good choice for HTPC & dorm rooms.

[ritorujon]

I believe you made a little mistake when counting the maximum power which can rectifying bridges pull up from the power grid.
1) 115V * 12A = 1380VA (not W)
which is only 1380*(2^(0,5))/2 W = 975W(for sinus AC signal)
2) Now you have to subtract the power taken by bridges themselves - I'm not sure but it should be from 4*0.7*12VA=33.6VA to 33.6W ....
3) Then you apply the efficiency of other components (should be over 80%)
and in the worst case you get 753W
Conclusion 1: This doesn't look very overspec'ed to me

ad 1) And what about to try ATX2.2 spec. minimal outlet voltage => 90V ?
90V*12A = 1080VA, 1080VA = 764W, 764W-33.6W = 730W,
730W*0.8 = 584W
Conclusion 2: If the outlet voltage dropped to 90V the power supply could have problem to deliver full power and rectifying bridges could get overloaded and damaged if the dropped voltage persisted for longer period of time(minutes)!

[Gabriel Torres]

Hello,

Your math is not correct, because the 115 V from the power grid is already the RMS voltage; the peak voltage from the power grid is around 160 V. The math you do would only work if we were talking about the sine voltage/peak voltage, which is not the case.

Cheers,
Gabriel.

[player]

Can someone explain me why OCZ dedicated 2 rails for CPU only, and put both PCI-E connectors on the same rail, when PCIE connectors draw more power than 4 pin CPU connectors?