FSP and Silverstone PSU Compared in Crossfire Stress Test

jmke · 27th July 2007, 14:00

We take a look at two high wattage power supplies from companies known for their solid product lines; the Silverstone DA750 model features a single 12v rail and is rated at 750W. The FSP Epsilon has four 12v rails and combined offers up to 900W. We stress test these units in a real world environment with the most power hungry vga cards out there, two ATI HD 2900 XT in Crossfire. Read on to find out

http://www.madshrimps.be/gotoartik.php?articID=558

10th March 2010, 09:44

FORTRON / FSP Power Supply Units are unreliable hardware devices.
Failed just after 784 days of normal use (about 3500 hours only)!.

jmke · 10th March 2010, 10:02

MTBF doesn't guarantee you a minimum life-time expectancy FYI

10th March 2010, 10:21

Yes, 2 years but warranty was over since 1,5 month only.

jmke · 10th March 2010, 10:24

how many FSP PSU do you own?

10th March 2010, 10:38

Just one, Epsilon 700w definitively useless by now also it was properly protected with an UPS.
Such material is normally designed for 100,000 hours.

jmke · 10th March 2010, 10:49

Quote:

Such material is normally designed for 100,000 hours.

no, it has MTBF of 100.000 hours. And MTBF != LifeTime

Quote:

nother common misconception about the MTBF is that it specifies the time (on average) when the probability of failure equals the probability of not having a failure (i.e. a reliability of 50%). This is only true for certain symmetric distributions. In many cases, such as the (non-symmetric) exponential distribution, this is not the case. In particular, for an exponential failure distribution, the probability that an item will fail at or before the MTBF is approximately 0.63 (i.e. the reliability at the MTBF is 37%). For typical distributions with some variance, MTBF only represents a top-level aggregate statistic, and thus is not suitable for predicting specific time to failure, the uncertainty arising from the variability in the time-to-failure distribution.
http://en.wikipedia.org/wiki/Mean_ti...sconcepti ons

you can't decide on experience with ONE sample that a whole range of products is broken/bad.

10th March 2010, 11:09

I agree with you and the above MTBF but when you pay US$200 for a device you don't expect that you should do it again 2 years later... :-)
Especially when the breakdown is obviously the device itself.

jmke · 10th March 2010, 13:24

I've had laptops break down a week after their warranty has expired, sometimes you get the short end of the stick

the other 200 laptops kept working years after their warranty expired.... that's life

24th March 2010, 15:02

Quote:

Originally Posted by jmke

you can't decide on experience with ONE sample that a whole range of products is broken/bad.

Epsilon platform based PSUs commonly show "ripple happiness" from the start (even some advertised PSU specs breaking ATX specification) and FSP uses mostly cheap capacitors avoided by many makers.
So with such product propability of getting that short end of the stick is simply higher.

27th July 2007, 14:00	#1
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,013	FSP and Silverstone PSU Compared in Crossfire Stress Test We take a look at two high wattage power supplies from companies known for their solid product lines; the Silverstone DA750 model features a single 12v rail and is rated at 750W. The FSP Epsilon has four 12v rails and combined offers up to 900W. We stress test these units in a real world environment with the most power hungry vga cards out there, two ATI HD 2900 XT in Crossfire. Read on to find out http://www.madshrimps.be/gotoartik.php?articID=558 __________________

10th March 2010, 09:44	#2
MTBF Posts: n/a	FORTRON / FSP Power Supply Units FORTRON / FSP Power Supply Units are unreliable hardware devices. Failed just after 784 days of normal use (about 3500 hours only)!.

10th March 2010, 10:02	#3
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,013	MTBF doesn't guarantee you a minimum life-time expectancy FYI __________________

10th March 2010, 10:24	#5
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,013	how many FSP PSU do you own? __________________

10th March 2010, 13:24	#9
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,013	I've had laptops break down a week after their warranty has expired, sometimes you get the short end of the stick the other 200 laptops kept working years after their warranty expired.... that's life __________________

10th March 2010, 10:21	#4
MTBF Posts: n/a	Yes, 2 years but warranty was over since 1,5 month only.

10th March 2010, 10:38	#6
MTBF Posts: n/a	Just one, Epsilon 700w definitively useless by now also it was properly protected with an UPS. Such material is normally designed for 100,000 hours.

10th March 2010, 11:09	#8
MTBF Posts: n/a	I agree with you and the above MTBF but when you pay US$200 for a device you don't expect that you should do it again 2 years later... :-) Especially when the breakdown is obviously the device itself.

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