PC Power and Cooling 750W PSU for $65 + FS after $35 MIR @ Amazon

[jayn1321]

Can anyone tell me if this would be able to handle two gtx 280's in SLI?

thanks

[chejrw]

Should be able to handle it easily, at least in terms of pure amperage.

[KaosFaction]

Quote from chejrw : I have done extensive research, and built many, many PCs. Hook your psu up to an oscilliscope - you'll get much cleaner power with the GPU and CPU on their own rails (3 rails in the case of SLI - one for each GPU), than with them all on the same rail. Yes, there is essentially no risk of overdrawing if you have one rail, but if you're not an idiot that should never happen anyway. Go ahead, feed your $300 video card dirty current. Just don't complain that it died after a year.

Being taken in by the marketing are we?

"So does splitting the +12V rails provide "cleaner and more stable voltages" like I've been told in the past?

It is true that marketing folks have told us that multiple +12V rails provides "cleaner and more stable voltages", but this is usually a falsehood. Quite frankly, they use this explaination because "offers stability and cleaner power" sounds much more palletable than "won't necessarily catch fire". Like I said before, typically there is only one +12V source and there is typically no additional filtering stage added when the rails are split off that makes the rails any more stable or cleaner than if they weren't split at all."
-jonnyGURU

[chejrw]

As I've said, I've hooked my PSUs up to an oscilliscope and qualitatively measured the voltage trends.

You're being taken in by their marketing. Do the measurements yourself. Perhaps that's true on budget PSUs, but on high quality multi-rail units (Antec, Corsair, etc), they either use separate sources or there is significant filtering.

That's my personal experience. As I said, please do the measurements yourself.

[s1175290]

Quote : As I've said, I've hooked my PSUs up to an oscilliscope and qualitatively measured the voltage trends.

Qualitative = high degree of subjectivity

Quantitative = specific measurable results


Yeah, I feel like being 'that guy' today.

[KaosFaction]

Quote from chejrw : As I've said, I've hooked my PSUs up to an oscilliscope and qualitatively measured the voltage trends. You're being taken in by their marketing. Do the measurements yourself. Perhaps that's true on budget PSUs, but on high quality multi-rail units (Antec, Corsair, etc), they either use separate sources or there is significant filtering. That's my personal experience. As I said, please do the measurements yourself.

I think you may feel the same in opinion that hooking up a PSU to an oscilliscope and hooking it up to a SunMoon SM8800 are a tad different. And if by "their marketing" you are implying a independent review site, which actually dissects each and every power supply down to the individual capacitors, then sure, I've been taken in.
http://www.jonnyguru.com/

As for this PSU ~ great reviews from all around. (although I wouldn't recommend this to the guy asking about GTX 280s SLI'd...Personally wait for about another month after CES when several companies enter the PSU market and drive down prices through competition on the higher end models.) This price drop is likely due to the upcoming release of the Silencer 910W.

[awwc]

when I can't get enough of my ex and I arguing semantical BS, I come to SD for the latest in nerdtastic tomfoolery. Different, yet same great after-taste.

[chejrw]

Quote from s1175290 : Qualitative = high degree of subjectivity Quantitative = specific measurable results Yeah, I feel like being 'that guy' today.

Bleh, sorry. Typo.

[FMcamaroZ28]

FANTASTIC power supply. Have this exact one in my build, and Ive seen them go over 150 in some places when they were first available.

Runs : Asus maximus extreme - OC'd q6600 - 8 gig ocz - 2 x 3870x2 - 4 HD - 2 cdrom - 4 fans. without hiccup.


HIGHLY RECOMMENDED.

[glades]

Hey guys

Quick question, I got an Optiplex 755. I upgraded the Celeron process to Core2Quad and added 3 gigs of ram. Thinking I need a new PSU for it, not a techie but will this PSU suffice?

I upgraded the system, here is what I added. Sorry for not posting earlier

Optiplex 755 Minitower upgrades

Intel Core 2 Quad Q6600 Kentsfield 2.4GHz LGA 775 Quad-Core Processor Model BX80562Q6600 - Retail
CORSAIR DOMINATOR 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop
SAMSUNG 22X DVD±R DVD Burner with LightScribe Black SATA Model SH-S223Q - OEM
Seagate Barracuda 7200.11 ST3500320AS 500GB 7200 RPM SATA 3.0Gb/s Hard Drive - OEM
EVGA 256-P2-N749-LR GeForce 8500GT 256MB 128-bit GDDR2 PCI Express x16 HDCP Ready SLI Supported Video Card - Retail

[RENIK]

I bought this new from NewEgg for $125 a few months ago and it is very quiet and very heavy (a good way to know you bought a decent PSU). It runs my i7 at 3.7Ghz, a Radeon 4870, and a ton of peripherals without a hitch.

[seanpellis]

I will never again buy a non-modular PSU. I've been spoiled.

[chejrw]

Quote from glades : Hey guys Quick question, I got an Optiplex 755. I upgraded the Celeron process to Core2Quad and added 3 gigs of ram. Thinking I need a new PSU for it, not a techie but will this PSU suffice?

No reason to upgrade if that's all you did. RAM draws an insignificant amount of power, and the difference in CPU draw is probably less than 20W. Unless you upgrade the video card or add significant numbers of peripherals, or unless you are having problems with your system, there's no reason to shell out for a new PSU.

Quote from seanpellis : I will never again buy a non-modular PSU. I've been spoiled.

Indeed, they are very nice. The plugs tend to add a little interference and a slight voltage drop, but I think it's worth it for the convenience.

[burningrave101]

Quote from jayn1321 : Can anyone tell me if this would be able to handle two gtx 280's in SLI? thanks

It should be able to run two GTX 216's in SLI without any problem but two gtx 280's would be pushing it so no I wouldn't buy this PSU for a high-end SLI, especially if you plan to overclock a power hungry CPU.

That said I'm running the black version of this PSU at the moment and it seems solid. Very quiet. I have a Core i7 920 overclocked to 4Ghz+, 6 gigs of RAM, and a 4870x2 installed.

[cholepuree]

in for one!