Seems as if some of the SLI certified power supplies are not quite up to par.
http://www.extremetech.com/article2/...1932947,00.asp
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Seems as if some of the SLI certified power supplies are not quite up to par.
http://www.extremetech.com/article2/...1932947,00.asp
Enermax 660W death in combat here.....with 1900CF and FX60 overclocked:(
INQ reported recently that they need single rail PSUs for X1900 Xfire rather than multi rail PSUs
Jebus dude that has to suck.. atleast none of the parts got hurt right?Quote:
Originally Posted by Dumo
because that is what matters...
Interesting. Looks like the problem occurs from load balancing the system. The gpu's draw too much power through one of the 12V lines and the overvoltage control kick in and shuts things off.
So do you guys think the new 700W monster from FSP would be perfect for this scenario. Here is a quote from Xbit's recent review of the psu:
"The declared characteristics are truly impressive. The FX700-GLN has four +12V lines with a current of 15A each, and the only limitation to their combined load is the overall wattage of the unit, i.e. 680W for the main rails. In other words, the manufacturer promises you can load this power supply through one 12V power rail only."
I take that to mean that any one 12V rail can be loaded far above the rated 15A. Not sure what that comes out to as I don't think it would be additive like 15Ax4 = 60A. Maybe someone with more knowledge of this stuff can chime in.
you guys would be better off sticking to one of the PSUs from the review or get a nice 650+W PSU with a good single 12v rail......i mean i you can afford X1900 xfire might as well do that
Athena Makes a 850 watt PSU, with I think 48 amps on a single 12 volt rail.
thats the PSU I been eyein for the last month now. it's $280 at newegg.
The only problem I have is that I cant stand noise. So the PCP&C models are out. I am hoping their new Silencer models coming in April/May are going to be SLI ready.
The Liberty 620 passed all tests.Quote:
Originally Posted by Dumo
Doesn't really matter.. heck I once overloaded a PCP&C 1kw..Quote:
Originally Posted by situman
It happens..
What the heck were u powering? A space telescope?
try about 50 15k SCSI drives in Raid0 :DQuote:
Originally Posted by situman
LMAO! That'll do it. Happen to run HD Tach while you were at it?Quote:
Originally Posted by nn_step
I have seen several guys running 500-550 watt single rail psu's on GTX's in SLI with no problems. How much wattage does an oc'ed high end video card consume at full load?
That FSP 700 that Elfear mentioned sounds like it might do the trick, if the load balancing works like they say it should.
crapped out midway through..Quote:
Originally Posted by Lando95
but the Graphics cards pull out 120W stock and up to 180+w when overclocked with voltmods..
200W/12V is 17A....
2x cards should saturate the 12V pretty well in most ~500W PSUs.
how to you work that out againQuote:
Originally Posted by Shadowmage
The FSP does work well...I haven't had any issues at all yet...although I am not running CrossFire yet...but the PSU is indeed very nice and very solid. It was an excellent choice people here helped me with...
My Tagen (see sig) has a switch that combines the 12V rails into one rail, I wonder if that would help in an SLI situation (not that I will ever use SLI) or maybe help with high OC's when my dual core is sucking ~ 200Watts :cool:
my question is how do you know what rail you are drawing from? My OCZ 600w has all the plugs marked for different devices, sata, vga, p4, etc but from what i am reading you dont really know in most cases which 12v rails you are connecting to your devices...someone correct me if im wrong. i couldnt find anything about this in the manual.
nn_step:
I didnt think you could do RAID 0 with anything near that many drives. What controllers/hacks were you using? And isnt that way overkill for scsi320?
nn_step post's are full lies and utter exaggerations. It's become standard accross the board to just ignore his "post jockey" property.Quote:
Originally Posted by Xenogias
Thats not nice:)Quote:
Originally Posted by GMX
This is an important thread, hopefully we can pinpoint any problems before a lot of psu goes tilt.
Just because you know everything best, right :rolleyes:Quote:
Originally Posted by GMX
Lets go back to topic:)
So.... single 12V psu is better to run SLI/CF?
That seems to be the case, but we won't know until someone tests a multi-rail psu that can run full amperage on 1 12V rail.Quote:
Originally Posted by Dumo
IMO it`s just depends on actual model and it`s schematics. As macci sad he had problems running CF with OCZ600 which has two 12V rails and no problems with single 12V rail PSU. But in this thread good example about using FSP 700GLN with 4 12V rails on CF/SLI system. And despite all those brands there are only several actually different schematics in PSUs. And under few brands logos there just might be same one PSU.Quote:
Originally Posted by Dumo
P.S. nn_step HDs don`t use 12V rail ;) they use 3.3&5.
Check this outQuote:
Originally Posted by chunkylover77
I'm very happy with mine (and I went from an 850 SSI due to noise)! :)Quote:
Seasonic S12 600W Power Supply Passed all tests
That would be incorrect. Mechanics usually use 12v. HDDs are (contain) if anything mechanical parts. ;)Quote:
Originally Posted by Cooper
Question on my mind is why didn't psu manufacturers just have each PCI-E on a separate rail to begin with ?
easy 1kw psu 5v+ rail is only rated for 30A hehQuote:
Originally Posted by situman
You mean having 3+ rails? No idea... but If you mean in a dual rail PSU one PCI-E power connector on the main rail and one on the second, it's probably because of either crossloading or noobs would use the wrong (main) in case of single graphics... as long as the dedicated 12v for PCI-E provides enough *juice (without messy crossloading requirements), this wouldn't be a problem to begin with (and I don't think it'll be solved by adding another rail).Quote:
Originally Posted by eva2000
I also thought about this. This is really weird, since even the 510 ASL's 5v+ is rated for 40A - 10A more than both of its elder brothers. Luckily, at least the 1KW delivers 0.5A more on the +5VSB than the baby...Quote:
Originally Posted by eva2000
*edit: spelling
yeah that actually brings up another question, why don't psu manufacturers actually label the power cables and explain in their manual, on the box what the power distribution is for each cable to what item cpu, video, hdd, mb etc ?
THIS is what I'm talking about. Individual connectors are labelled for different devices but from my understanding, you still don't know for sure which 12v rail you are pulling from when you connect a device. With split or quad rail psu's I think you really need some kind of explanation as to what rail you are drawing from so you don't overload any individual 12v rail. Thats my understanding of split rails and quad rails, its connector specific and not automatic...PSU manufacturers are you reading this thread??Quote:
Originally Posted by eva2000
they should design the PSU properly so they dont have to.
Usually it's one type of connectors for one rail, here is how the different connector types are commonly split between the 12v rails (on PSUs with four or more rails):Quote:
Originally Posted by Xenogias
* One or two rails for mobo connectors: This includes 20/24-pin on first 'mobo' rail, with P4 4-pin and 8-pin connectors on second 'mobo' rail (if available, otherwise they're all on the same one).
* One or two rails for PCI-E 6-pin connector(s) (usually two, either one per rail or both on the same).
* One extra rail for molex, SATA, FDD and rest connectors.
As you see, you can't really connect anything wrong here, unless the PSU has some weird cross-loading scheme (but that's an entirely different story!). It's usually the same on PSUs with two or three rails (in the sense you can't really connect stuff to the wrong rail, rail schematics may differ a lot still).
I run the same psu,Quote:
Originally Posted by alpha0ne
This morning i got bored and flicked it from dual rails (20a each) to single (35a)
and now, 2.75ghz is stable :slobber: :eek:, up from 2.6ghz and the x1900xtx got an extra 20mhz on the core and 10mhz on the mem.
I also noticed that the rails like 5v,12v and 3.3v are much more stable according to my dmm and are slightly above, eg. 12.21v idle and 12.19v dual load, instead of dual rail when they ran at 11.9v load.
Considering i just moved a switch selector, thats a damm impressive gain!
Hehe nice to see an improvement, I was/am pretty sure thats the way to go but I just keep forgetting to switch mine over :rolleyes: , my rails ATM are 3.3, 5.08 and 12.54 that droops to 12.42 under load so I am very happy with this PSU and the near total silence :toast:Quote:
Originally Posted by 3NZ0
I will change to single rail tomorrow if I remember :stick: , I am also getting a Meamwell mini PSU to power my fans and WC pump so maybe I can manage 3GHz out of my 170 though will have to wait until the heat wave is over, above 36C for the last two days and ar least another 3 days to go :(
12.5 is kinda high IMOQuote:
Originally Posted by alpha0ne
well overvolting has the effect of improving your overclock.. :rolleyes:
Single rail is why I got the OCZ 520 Powerstream instead of the 600W. 34A opposed to 2x20A. If you want a good beefy 12V rail, look for the Zippy 700W. It's cheap and has 45+A on the 12V.
Which is total crap, it came out of the box overvolted on the 12V rail :rolleyes:Quote:
Originally Posted by nn_step
Thats precisely how my Antec Neo HE 500w is set out, everthing is clear as a bell as to what goes where... confusion... where ? and the cable management system is fantastic. Only use what you need. :fact: :DQuote:
Originally Posted by krille
Heres the specs....Quote:
Originally Posted by thunderstruck!
http://img179.exs.cx/img179/4707/zippy0zy.jpg
And the mods....Thanks Hipro:toast: ...http://www.xtremesystems.org/forums/...124#post717124
But is it quiet?
Originally linked by theinq.net
http://www.extremetech.com/article2/...1932958,00.asp
Again, XS was the first to discuss this, months ago...
http://www.xtremesystems.org/forums/...ighlight=power
Beings that I OC i could care less if its real noisey or not. If it was just a stock everyday PC then sure i would prolly care if it was loud, But what most of us do with our systems its not a big deal if its loud. I care about performance.Quote:
Originally Posted by chunkylover77
my pcp&c 510 SLI dominates SLI....
Silverstone LaScala LC18
AMD fx-60 @ 3.0ghz
DFI SLI Expert
4GB OCZ memory
4x Raptor 150GB
300GB seagate
250GB Maxtor
160GB WD
120GB WD
80GB Maxtor
2x XFX 7800GTX 512MB @ 600/1850
1x Optical Drives
2x 120mm fans
2x 80MM fans
Coolermaster Aerogate fan controller
7in Touchscreen on front of case
And that's with 1% tolerance, even less measured with a multimeter. It simply doesn't move more than .01 idle-load.
Only problem is yes, it is loud. That's why I just an acrylic cover for the psu with a 92mm fan hole in it; I'm mounting a 92mm silent fan externally on it, and swapping out the 80mm fan inside it for a noiseless one, and I'll end up with total DB level of around 25db with more CFM than stock fan.
Its actually a question of ATX specs and video card manufacturers making cards that pull more than ATX specs will allow for dual rail PSU's.
Our 600W unit is pretty strong but has dual 12v rails, not good it seems as many have found for Xfire or SLI, the 520W has 1 fat 12V line and is aparantly better. Now OCZ are not in the business of sitting down about this so we are designing units that will cope better, the issue is we are now being forced to make PSU's that deviate a little for official specs just to cope with power hungry video cards.
Think about it this way its only since SLI and Xfire PSU's have had serious issues and its always the last piece of equipment that end users feel they have to upgrade.
Be warned. I thought my PCP&C dominated as well. Then this happened:Quote:
Originally Posted by computerpro3
http://www.xtremesystems.org/forums/...ad.php?t=91628
i'm still working out how to turn my 600w powerstream into a single rail monster tony ;)
holy crap. Well, I'm ordering a zippy 700w for my home pc, now you've got me thinkin of doing the same for my htpc....Quote:
Originally Posted by mdzcpa
Antec NeoHE, Fortron Epsilon and Tagan 2Force power supplies are excellent choices for high-end SLI and CrossFire setups.
Antec NeoHE 550W:
It has three 12V lines, 18A for each.
Maximum combined load for 12V rails: 42A
5V rail is rated to 20A.
According the tests made with "The Undertaker" (bunch of power resistors), it can supply 730W without any problems. For 12V rail I used eleven resistors which consumed 4.42A each (11.96V x 4.42A = 52.86W). 11 x 4.42A = 48.62A.
For 5V rail I used three resistors that took 10.225A each (4.82V x 10.225 = 49.28W).
So the overall combined load was 729.29W. Pretty well for 550W PSU ;)
My Etech PM-300 energy meter showed that the psu took 781W from the plug. It means that the effiency is even better than Antec states 85% vs. 93%
Even the 5V rail drops slighty, you can always perform an old school sense mod.
Unfortunately the Newegg reviews for antec neohe arent so great :(
http://www.newegg.com/Product/Custra...82E16817103941
Most of them are talking about old NeoPower, not NeoHE series.Quote:
Originally Posted by perkam
The original NeoPowers are made by Antec, these are made by Seasonic ;)
I know The Antec NeoPower was the greatest Antec PSU ever..:fact:Quote:
Originally Posted by The Stilt
as for the NeoHE.. the qualtiy control on them is far less and they are made for cheap upgraders.. and considering the fact how freaking light they are.. I don't trust them and niethier should anyone else..:fact:
Higher efficiency = less cooling needed = less weight.Quote:
Originally Posted by nn_step
Have you ever tried to run SLI or CrossFire setup with Antec NeoPower?
Fortron is definitely one of the best power supply manufacturers in the world...
Do you know how much does Fortron Epsilon 700W psu weight? It it also pretty light since it has pretty high efficiency ;)
By high effieciency you mean low redundancy and bad tolerances.. which is unacceptable..
Antec 550 dead on action here with only single 6800Ultra and FX55 overclocked to the hilt:(
Nooo...Don't even put Antec Neo near SLI/CF rig:)
lol.. Oi.. I am sorta glad I didn't go dual core.. I'm likely stressing my quad rail silverstone out as is...
People still use Antecs? When Compusa starts selling them, it made me think twice.
Yeah.. they are good for the price.. they aren't PCP&C but they are acceptable for what is demanded of themQuote:
Originally Posted by situman
That is certainly the case.Quote:
Originally Posted by Dumo
I need to power a Supermicro H8QC8 with 4x875. It works fine with my single-rail OCZ 520W. But of course I won't do 8-core prime at full power with that PSU. To actually run with the 520W I downclock and undervolt the CPUs.
So I ordered a custom build of PCP&C 1 KW (I need two native 8-pin EPS12V). Apart from them first sending a wrong build, the replacement does not power up the above board. Tech support figured I overload one of the 12V rails (it has 3) on powerup and shrugged, giving me a refund.
I now ordered an Athena 850W, which has 48 A on the 12V, and a switch to put the 12V on one or two rails.
And yes, I will burn it in for a week before trusting my Supermicro with it...
P.S. I tried some of my socket 939 overclocks with the PCP&C 1 KW. Compared to the OCZ 520W there was no gain.
nn_step, post edited :) Pls take a look at who you're talking to before making claims of bs.Quote:
Originally Posted by nn_step
Antec has a long way to go in proving people that it is up to par with PCP&C, OCZ, Zippy and Seasonic. Enermax is doing it as we speak.
Check out the Enermax 500W Liberty review in the Xtreme Reviews. That thread alone has been the cause of the popularity of the Enermax 500/620W liberty at XS and the reason Enermax rep joined up to answer some of our questions...they've started to come around :) And Antec will need to do so again, i wouldn't mind if they used some snazzier marketing either. :p 22 Amps per rail on dual rails is a feature you can appreciate :)
Perkam
Same here:toast:Quote:
Originally Posted by uOpt
For anyone interested in quiet and performance you might want to wait on the new PCP&C Silencers coming in April.
10.225 x 3 = 30.675A ;)Quote:
Originally Posted by The Stilt
30.675A x 4.82V = 147.8535w
Glad I'm not gonna be running SLi or Crossfire, I'd be a bit paranoid about the safety of my hardware, even with this OCZ 520.
Anyone tried the Silverstone ST56ZF yet ? It has that PCP&C something ... solid built, no bling-bling, all black, single 80mm fan. It also comes with one beefy 12V rail, pushing 38A sustained and 45A peak, dual PCI-e connectors, and a sexy chopper inside.
I'll throw FX-60 and Crossfired X1900XT's at it tonight, to see how it does ... the only think lacking is the adjustable rails.
http://img78.imageshack.us/img78/460...e0034rz.th.jpg http://img126.imageshack.us/img126/7...e0045xf.th.jpg http://img129.imageshack.us/img129/7...e0056sv.th.jpg http://img228.imageshack.us/img228/1...e0063nd.th.jpg http://img131.imageshack.us/img131/9...e0072mg.th.jpg
PS: it's also very decently priced around here too, about 2/3 of the price of a OCZ 520W.
How will they compare to Seasonic S12 600 in terms of "performance" (wattage, rail stability etc), and most importantly: inaudibility (silence)?Quote:
Originally Posted by chunkylover77
Linkys?
I would love a version of my 850 SSI as quiet as my S12 600... :slobber:
That PSU looks good. If you don't mind, you can maybe take the cover off and find some pots within the housing. Also, do any of these recent PSUs use sense wires? (like the older Antecs - the new antecs still have them i think)Quote:
Originally Posted by Micutzu
It's priced about $165AUD here compared to OCZ 520s at $230AUD.
Looking forward to your results.
be careful to make sure the right ends of the modular cables are plugged into the psu with Silverston ST56F, as folks have killed cpus and hdds with accidently plugging wrong end of modular cables into the psu and components!
This PSU is another version. It's not modular.:stick:Quote:
Originally Posted by eva2000
BTW, I have that PSU. It's a sexy beast, but I'm worried about whether, it can handle 7900GTX in SLI or not.
Unfortunately they don't use sense wires :(Quote:
Originally Posted by GMX
I'll get to it tomorrow when i'll get back to work ... anyway it seems like a great benching PSU, especially for that price. I'll even go that far that i will say it's better than the 520W Powerstream as far as benching requirements go, can't wait to see who's making it's electronics.
Krille all I got was an email from PCP&C saying that there new more powerful Silencer's were coming in April/May. I will be waiting till then.Quote:
Originally Posted by krille
Same here.. when they come out.. I know I'm getting atleast 3..:DQuote:
Originally Posted by chunkylover77
The Silverstones are supposed to be pretty loud.Quote:
Originally Posted by Micutzu
Which was also the case for my PCP&C 1 KW, BTW. It's wasn't so much the volume of noise, but the fan had a very mechanical sound to it, as opposed to a wind sound which I find less annoying at same volume.
They have 120mm fan models too but generally yes, the Zeus series is pretty loud. From what i've seen so far, it's similar with the 510W and 1KW Turbocools as far as noise is concerned.
That drives me puts about the 4+4 == 8-pin EPS12V in the OCZ, too.Quote:
Originally Posted by eva2000
If you use a 4-pin board, it is way too easy to take the wrong 4-pin (half of the 8-pin) and insert it 90 degrees wrong, so that you pump 12 V into a ground line. The nudges that make up the coding on the 4 pins are such that it fits perfectly if you take the wrong 4-pin.
Give me real 8-pin and 4-pin like on the Seasonics and Athena any day.
Good news, it has one pot that is in charge with all the rails, like on the Zeus 650W. 12V set at 12.26 in idle, drops at 12.18 in full load with Venice @ 2.7 / 1.7V and X1900XT CF edition at stock. I was waiting for the A8R32-MVP to set up a CF rig but that's gonna take a little bit longer, i think i'm going to use the A8R-MVP for now.Quote:
Originally Posted by GMX