Hi!
To buy a quality PSU is much better. Good PSU have better components inside which will take care that the lines will be stable inside the ATX-specifications. Cheap PSU sometimes can not hold the stability under load. Even it is 50% load of what they are labeled.
Efficiency of cheap PSU is very bad. this means more warm air (because all "lost" power is transfered to HEAT) and warm or even hot air no PSU likes and also your system don´t like warm air.
Safety functions are very important for the safety of the PSU AND our whole system.
sure, also good PSU can fail after some time, every computer component can fail after some time. But a good PSU will not kill the other components too. A cheap PSU can be like a bomb - "If I die, I will killy you all".
So, there are lots of reasons why to buy a good PSU.
The labeled max. output like 550W you can trust when it is a brand PSU. In Germany some reviewers test if a 110% load is OK for the PSU´s, that´s also a indication if it is good or not. So have 605W load on a 550W and it is still stable and working fine.
Cheap PSU with 550W.....normally don´t reach this. some rech 50% of the labeled output, some 70%, some maybe 90%.
Please add COUGAR to "A"
I totally agree with you all, choose a quality PSU, the investment is good.
Citat:
It's very hard to choose a good one sometimes because most sites that test psus dosn't test them properly. That means the have checked if it gives the power it says on the label, they look what capacitors there are, check rippel etc.
To test a PSU properly is really difficult.
The main point is the test environment. In Germany for example we only have one person which checks them very carefully. He also has the knowledge about PSU like nobody else. As I know, he is preparing an english website now, hope this will be ready soon.
For a good test you need to know everything about it and best is you use some CHROMA 8000 machines, have access to a EMI-shielded room etc.
Then the costs are over 100.000 Euro.
Of course, nearly nobody can afford this just to prepare good reviews.
Citat:
A 1000w system for a gamer is i7 OC 4ghz+, 2x HD4870x2 OCed and probably 30-40 harddrives or something like that.
sounds ok, but 30-40 HDD´s will be a problem for every PSU which is build for private and office use.
When these HDD´s have to start, they need more power in the first miliseconds. I don´t think that this a normal PSU can stand.
For this amount of HDD´s you better have a look on server PSU and/or industrial PSU.
Up to 8-10 HDD´s and a few ODD´s should be no problem.
Citat:
And it never hurts to look up who is the actual manufacturer, don’t always assume a well know brand equals good quality.
that´s right. I already mentioned just some few companies which develope, produce and sell their own products. We are one of them.
Lots of brands on market even use several OEM´s for their PSU, so the quality is not stable. Or they change the OEM and the quality again is different.
If you want to put a 1kW PSU under 100% load, you better use 4 GPU´s, an overclocked i7 CPU and the usual drives. But it is not a good idea to have always 100% load for the PSU when your system is under load.
A 1kW PSU is perfect when you have up to 700-800W as maximum load.
Because in Idle you should keep the 20% (200W for the system) in order to have a good efficiency and less heat. and to reach 200W under IDLE is not that easy to reach.
So, such system should include a i7 OC, 2x 4870 X2 (needs more in Idle than GTX 295), some drives etc.
Then a 1kW PSU would be the perfect choice.
