PSU 1200 Watts by hipro-tech...

[jonnyGURU]

Thanks guys......

I have to add something here to PSU testers/reviewers.....

When you test a PSU in idle, in middle load and in full load, did you EVER try to feed it with load from idle to load INSTANTLY....
What do I mean? (...and some testing methods).....

a. NONE of you who measure them and reviewing them with "Dummy loads" (resistors for load) and not onto a motherboard, have put on its outputs a 100nF CERAMIC and a 220uF TANTALUM capacitors in parallel so to "semi-perform" and "simulate" the "motherboard" and not to produse by its own oscillations..... No?....Why?.....You just trough it onto resistor load and that's it......WRONG.....Why?.......Because you HAVE to "through" it onto a CARBON HIGH WATTAGE resistor and NOT onto a metal film or METAL wired resistor......
This is because METAL wire resistors are becoming COILS (chokes) and they OSCILLATE (producing RF) at certain frequencies with the switching power supplies, so you measure these oscillations as well......
Take that into consideration next time......
You just CAN'T measure ANY type of SWITCHING Power Supply just like that (simple)......One the other hand, IF it's a LINEAR PSU, you can do whatever you want with its outputs.....

Wrong. Please do not make blanket statements. Maybe it's the language barrier, but it makes you sound protentious and arrogant to assume that there are NO PSU reviewers doing "proper" PSU reviews. As for using the proper capacitance: I do, Spectre does, Madmat does to name a few. Don't be so pretentious to think that "all of you guys" simply can't read the ATX12V specification.

Citation: http://www.jonnyguru.net/forums/showthread.php?t=164

Oh... and FWIW, an ATE does not use resistors to create a load.

Citation: http://www.jonnyguru.net/forums/showthread.php?t=26

b. Have you feed it from idle to load INSTANTLY and MANY TIMES > load - idle - load - idle - load - idle - etc. for MANY times to see if it can "handle it" and not burned down..... OR you just go from idle to load and take your measurements.....

There are TOO many parameters and "heavy" methods to measure/torture a PSU that never have been applied.....

WHO of you have REALLY torture a PSU?......NOT by leaving the load on it for much time......BUT when it's "hot" from the load, remove the load instantly and then apply it and then remove it and then again, etc.....

You need to get out more often. Again, me, Madmat, Spectre.... the load testers we use do not "ramp up" loads. When you hit the test button, it's zero to all, baby. No ramp up. You only get that ramp up effect when you push the up arrow on a SunMoon or TechRed or when you spin the dial up from zero on a Chroma. But that's not normally how you use that kind of machine, is it? No. In addition to this, Spectre uses a transient load application device adding 9.25A to the 12v rail and 3.75A to the 5v rail for a duration of 10ms to the already warm PSU with a hammer of a load to see how severe the resulting voltage drop is.

Citation: http://www.hardocp.com/article.html?...50aHVzaWFzdA==

HAVE you EVER put the PSU you're testing/reviewing (IF you want to do the best review out there?) into a HOT CHAMBER and test it at it 40*C, 50*C, 60*C, 70*C and see how it does by loading it > unloading it >loading it > unloading it, leave the load on, etc?.......NO.......
Think about that the PSUs out there, aren't working under the same conditions.......
"a" user works it differently from "b" user..... One user is in Alaska and the other user is in Africa.....

Again.. yes. Madmat and I use a homemade hot box and Spectre uses a modified incubator. Over 50°C? Of course not. That exceeds operating environment temperature of that unit, but do you know what... YOU don't either. That SevenTeam unit isn't going to run with over 50°C intake for very long either, at least not at full load. As it's spec'd out by SevenTeam, it barely does 1200W @ 40°C for any prolonged period of time. Prove me wrong.

Citation: http://www.hardocp.com/article.html?...50aHVzaWFzdA==

So what do we have here?....

We test it with a digital oscilloscope (for people's "eyes"), we put load on it and test it under different loads......and........THAT'S IT.......We made our review.....
NO REAL torture on it.......What's the purpose of it......Anyone (who knows 5 things) can buy an oscilloscope and a "Dummy Load" network and start testing......

IF we want to present something "special" to our readers, we HAVE to test it DEEPLY and TORTURE our reviewing samples.......

I mean that you HAVE to test it under these conditions to be sure how it does and IF it doesn't burn down (or it burns down after all the others), you can come up with your conclusions that it's OK or it misses this and that and things like these.....



Though that's only MY opinion on PSU testing....


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I think before you make blanket statements about reviewers and say "NONE of you" as if to imply none of us know what we're doing, you need to do some fact checking.

PM me. I'll get with Kyle and Paul (Spectre) at HardOCP and have Oklahoma tear the unit apart for component analysis. I'm fairly certain we live up to your "standards" for PSU review. And AFAIK, both Spectre and Wolf are familiar with the off the shelf Seventeam unit as I've already sent each of them one of mine.