Using 2 PSU has CLoD kicking it in high gear!

[warbirds]

"PC Power and Cooling" power supplies are the only ones I will use. They build industrial power supplies and hobby power supplies. They build them, not import them.

[swiss]

Originally Posted by Vengeanze

Eeeeehh, I'd like to see some docs on that cause you've got a hole world of OC:ers saying otherwise. Might be a hype but just to be sure, give us a link plz.

How-to-Discover-Your-Power-Supplys-Real-Manufacturer

http://www.tomshardware.com/reviews/...-oem,2729.html

[Korn]

Originally Posted by InsaneDruid

Geeze, so much BS in one single thread.

First, an underrated PSU can NOT fry your system. Just would lead to instabilities due to insufficent power. But no damage AT ALL.

Second, combining 2 ore more PSU can give some very bad differences in electrical potentials if you don't make a proper low ohm connection of their ground potentials.

Third, the recommended specs for video cards are mostly overdone, so that even the worst low cost psu with the given (paper) rating could handle them.

Forth, the recommended PSU brands (OCZ, Corsair and Cooler Master) don't even build psus at all, just rebranding them.

Corsair for example are just OEM seasonic (which itself is top notch, but the oem versions may vary) or channel well.

http://whirlpool.net.au/wiki/psu_manufacturers


Fifth, even the idea that a PSU can do ANYTHING to performance is.. borderline to say it the least offending way.

Finally someone who talks sense, i was amazed at what silly things some people were saying here, and actually others believing them.

Look here, this is an excellent article from a reputed hw site: Debunking Power Supply Myths. For those lacking time or patience, just read this:
++++++++++++++++++++++
System 3:
Intel Core 2 Extreme QX6850, 4GB Memory, NVIDIA 780i Chipset, NVIDIA GeForce 8800 Ultra SLI, an optical drive, and four hard drives. For our third example, we chose some of the most demanding products for testing. In particular, the 780i Chipset from NVIDIA has the highest power consumption of all chipsets we've tested so far, drawing a constant 69W. (There is of course some variation in power consumption even from chips of the same family, and the features and extra chips on each motherboard differ from manufacturer to manufacturer. Our particular 780i is an EVGA motherboard.) The idle power consumption for this setup is around 310W, and once we place of full load on everything power consumption increases to 544W.
++++++++++++++++++++++

Grated it's an older article and therefor older components, however please note that this 3rd system is still a monster in power consumption terms and still comes shy of the 550W mark (that doesn't mean that a 550W source is recommended of course).

If anything nowadays the tedency in PSUs usage is gross oversizing, which leads to efficiency loss. And money loss. But hey, go ahead, use 10 PSUs if that's how smart you are, i'm sure you're going to notice vast improvement.

[Rattlehead]

Originally Posted by Korn

System 3:
Intel Core 2 Extreme QX6850, 4GB Memory, NVIDIA 780i Chipset, NVIDIA GeForce 8800 Ultra SLI, an optical drive, and four hard drives. For our third example, we chose some of the most demanding products for testing. In particular, the 780i Chipset from NVIDIA has the highest power consumption of all chipsets we've tested so far, drawing a constant 69W. (There is of course some variation in power consumption even from chips of the same family, and the features and extra chips on each motherboard differ from manufacturer to manufacturer. Our particular 780i is an EVGA motherboard.) The idle power consumption for this setup is around 310W, and once we place of full load on everything power consumption increases to 544W.
++++++++++++++++++++++

Duly noted.

But I had an 8800GTX, with a 530w Aopen PSU, and the rest of the system was the same as in my sig.
My PSU was taking strain, no doubt about it. It was runinng hot and the fan was spinning like mad. It didn't do that with my older 9800 Pro.
The PSU was about two years older than the card at the time, which might explain my problem, but there you have it. The system was not overclocked either.

Maybe someone can explain it?

[Doc_uk]

I never upgraded my psu, on my new build, i just used my old Thermaltake Toughpower 750w, that i had form my last build
Question is,
Is this any good, now? or should i look at upgrading

[II./JG1_Wilcke]

Originally Posted by Doc_uk

I never upgraded my psu, on my new build, i just used my old Thermaltake Toughpower 750w, that i had form my last build
Question is,
Is this any good, now? or should i look at upgrading

I have run the TT and were always happy with them. I did have one finally die on me, and it did it the sneaky manner where it was doing the fluctuating voltage on one rail. I have a test bench so it was easy to pull it and test it put a load on it and see it was on its last legs.

I get a lot of problem PC's in the door and 9 times out of 10 its a very old, tired and completely dusted up PSU. Aside from the 'bugs' its the number one thing that does go wrong with PC's aside from the abuse from their owners.

[Vengeanze]

InsaneDruid:
"Geeze, so much BS in one single thread."

Korn:
"i was amazed at what silly things some people were saying here, and actually others believing them"

What's with people's attitude these days?

Guess we can send Dutch_851's old Dell 350W PSU to either of you guys and you'd happily use it in your rig.
But you'd probably don't wanna swap your >500W, huh!?


I'd be suprised if a PSU had any effect on FPS. However, a gaming computer with shitload of heffy stuff will not run on 350W in all.
So all is well at the end of the day cause Dutch_851 got leverage to upgrade and add other componets if needed, plus that perhaps his 80 plus might save him some on his electrical bill (just speculating, u do the math if u want).

[SEE]

Originally Posted by Rattlehead

Duly noted.

But I had an 8800GTX, with a 530w Aopen PSU, and the rest of the system was the same as in my sig.
My PSU was taking strain, no doubt about it. It was runinng hot and the fan was spinning like mad. It didn't do that with my older 9800 Pro.
The PSU was about two years older than the card at the time, which might explain my problem, but there you have it. The system was not overclocked either.

Maybe someone can explain it?

I suspect in my case (similar to you) when I upgraded from a GTS250 to the GTX560ti my 750W PSU suffered overheating and the fan full bore after a few minutes of CloD. It seemed Ok with the GTS250. I replaced the 750w with a Coolermaster 600W with an identical 12V power ratings of 480W. Having stripped the 750W and tested it on a bench the main difference compared to the Coolermaster is the Heatsink size. The Coolermaster has a much larger heatsink and different alloy composition. The fan in most PSU's is controlled by Heatsink temperature. The smaller heatsink on my 750W must have been dissipating more heat with the GTX560ti in full bore and the fan rpm increasing to compensate.

When I tested the 750W under load it couldn't regulate the 12V supply and the voltage was fluctuating possibly due to prolonged use at high temperatures or a just poor PSU by design.

[SlipBall]

I'm in the market for a PSU and this article I found interesting. I'm replacing my multi rail unit.

"Lines are being drawn in the power supply war. On one side, we have vendors such as Tagan pushing “multi-rail” designs on its big 1KW+ PSUs. On the other side we have PC Power and Cooling which is pushing a single-rail design 1 Kilo Watt model.
If you think of each of these rails as its own power plant, a multi- or split-rail design breaks up the power among multiple power plants. So, on Tagan’s TurboJet TG1100-U95, you get four power plants, each capable of producing 20 amps of 12 volt power or 240 watts per rail for a total of 960 watts. PC Power and Cooling single-rail Turbo-Cool 1KW-SR features 72 amps of 12 volt or 864 watts continuous and can peak at 960 amps all one single rail.
Which design philosophy is better? I won’t draw any conclusions here but I can give you each side’s spin on the issue.
First up is Tagan, which argues that it’s about death and following the rules. A multi-rail design, the company says, is much safer and some international safety organizations don’t allow you to output more than 20 amps per rail. More than that, the company tells me, it could possibly kill you.
Tagan also says a multi-rail design complies with the EPS12V spec which everyone agrees to follow. If hardware vendors follow the EPS12V specifications for power requirements, they shouldn’t violate an EPS12V PSU.
As the sole PSU vendor pushing a single rail design for big PSU’s, PC Power and Cooling’s argument is quite intriguing. Even though the company once also pushed a multi/split rail design, the company has since decided that the single rail is the future.
The problem with multi-rails, the company says, is that power tends to get stuck on the individual rails. If the PSU, for example, allocates 36 amps of power from rail 1 and 2 to the CPU but the processors only consume 22 amps – the rest cannot be reallocated to the GPU or hard drive array. With a single-rail design, if the CPUs only use 22 amps of juice, the rest can be sent to the GPUs or whatever else needs the 12 volt power because it all comes from a single bucket of power.
As for spec’s, PC Power said the spec’s were written in the days when CPU power consumption was a runaway freight train. With Intel and AMD pushing low power chips, locking up X amount of amps for CPUs that will get used is the wrong way to do it. As far as safety goes, PC Power says it has certifications from UL and other international test labs that say it’s kosher.
The practical upshot, if both have done their homework on their PSU designs, is both will work. I think the single-rail certainly sounds more efficient with its send power where it’s needed outlook. But multi-rail designs should and have worked as well up to this point"