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  (#76)
inklimited
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Videocard: Gigabyte 6850 900MHz
Processor: i5 2500K 4.8GHz
Mainboard: MSI P67A-GD53
Memory: 4GB XMS3 1600MHz
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PSU: OCZ StealthXStream 600W
Default 07-21-2009, 16:06 | posts: 6,118 | Location: NSW Australia

Upgrading the PSU soon. Was looking at PSUs in the 850-1000W category, and am currently tossing between

-Silverstone OP850
-Corsair TX850
-OCZ GameXStream 850

The OP850 and TX850 both have 70A single rails, but the GameXStream has 4 @ 20A.

I suppose what I really want to know is, is this enough power for a year (or two)? I am currently led to beleive that I am on the limit of my 600W, and next gen cards are only gonna be more powerful. What would you consider to be the minimum wattage for the next couple of years, 70A is enough amps for a while yet, right?

Any ideas for other models? Looking for PSUs in the same price range as the ones mentioned (~$AU250)
   
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  (#77)
Makalu
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Videocard: EVGA 8800 Ultra
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Memory: G.Skill 2x1gb PC28500
Soundcard: Audigy LS/ Logitech THX 5
PSU: Gigabyte Odin GT 550W
Default 07-21-2009, 20:32 | posts: 4,197 | Location: Eugene, Oregon

Well, if your CPU isn't OCed and gaming is your peak loads then I think you've got about 100-150W of overhead left before you exceed the recommended 75% load on your current PSU. I really don't know what the future holds but you've got some room for upgrading there as it is.

I'd forget about the OCZ850GXS as an option...it's no where in the same league as the other two. It's a group regulated (budget) design and pushing the design limits of the Epsilon platform and rated at 25C and derates to ~700W at the 50 the other two are rated at and just doesn't perform nearly as well at any temp or load.
   
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  (#78)
inklimited
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Videocard: Gigabyte 6850 900MHz
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Mainboard: MSI P67A-GD53
Memory: 4GB XMS3 1600MHz
Soundcard: RealTek HD 7.1
PSU: OCZ StealthXStream 600W
Default 07-22-2009, 04:02 | posts: 6,118 | Location: NSW Australia

I was going to OC to 3.2GHz (400x8), which is going to require 0.1v bump in both Vcore and VRam, as well as a bunch of fans.

I've also just been looking at the 80Plus list. I looked for manufacturers which had at least one PSU in both the silver and gold categories, there aren't many (and most of the silver and gold ones are in the 250W range). The OP850 isn't there, but the OP850-P (P for Plus) is. A revision model just to make the grading? I'd get that, the specifications are the same, but it's not available in Australia. Anyway, another thing I was looking for ATM is a PSU with at least a Bronze 80 Plus rating.

A good idea, or just a gimmick? Some of these things either turn out to be old or flawed. Is the 80Plus a new thing?
   
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  (#79)
Makalu
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PSU: Gigabyte Odin GT 550W
Default 07-22-2009, 04:46 | posts: 4,197 | Location: Eugene, Oregon

The 80+ group has been around for a couple or three years but wasn't being used as a big selling point by everyone till recently and yes it is something of a gimmick in my opinion. Not that efficiency isn't important but differences of a few percentage points should really only matter to people who buy a lot of computers like corporations and governments.

Since an average single card system peak load is about 300W then an 80% PSU would consume ~380W and an 85% PSU would consume ~360W...only 20W less during peak use. Then when you consider that most systems aren't operated at peak loads most of the time that they are on the difference is even less...10-15W. So it's not going to make a significant difference in your electric bill.

The 80+ testing procedure is also flawed...tests are done at "ambient office room temp" in Tennessee which is unacceptable for control and their AC wattage metering is only accurate to 2% which introduces a lot of error into the final calculations. They only test at 25%,50% and 100% load levels and that skips too many data points but also I think the 100% load test is of no practical use for obvious reasons. We don't run PSU's at 100% load for the same reason we don't drive down the road with the tachometer needle pegged in the red. It also is keeping a lot of very good units from "scoring" so well due to the natural parabolic efficiency curve inherent in the switch mode design...efficiency drops as a unit approaches it's maximum output capability.

The other thing that is important to know is the the PSU companies are taking advantage of the loopholes in the 80+ system and playing tricks. Since almost every component in a PSU creates resistance and reduces efficiency they are simply removing components....components that filter ripple and smooth current and other things far far more important than a 20W difference in the electric bill. Another trick is to ground the transformer which probably pushes ripple thru the roof but 80+ doesn't test for ripple and they aren't testing to insure that the samples they get are the same as a retail sample. Other things done are lower the 3.3V and 5V rating on the label and since that's how 80+ decides the load distribution for their tests then that too will "improve" efficiency...the extra conversions make all 3.3V and 5V power less efficient than 12V power coming out of the unit. Some are submitting samples with short cables (lowers resistance...increases efficiency measurement). etc. etc. etc.

So you can tell I'm not big on 80+ as a purchasing decision at all. Pick a quality unit and the efficiency will be good...hey that's the same advice we all gave years ago before 80+ lol

Last edited by Makalu; 07-22-2009 at 04:58.
   
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  (#80)
Makalu
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PSU: Gigabyte Odin GT 550W
Default 07-22-2009, 05:16 | posts: 4,197 | Location: Eugene, Oregon

The OP850 is a fine unit btw...made by Impervio or actually Quasar IS at a state of the art factory in Taiwan. Or at least most of them are...demand was so high during the last Christmas season that some were made by hand on a line at the Etasis factory in China. Check out a Zeus 1200 on the line in Taiwan:

http://www.youtube.com/watch?v=qLNUwcz-Bt4

Expensive procedure and not many Impervio's out there because of it but Silverstone has invested a lot of their own money into the factory so of course they are using it.
   
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  (#81)
inklimited
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Videocard: Gigabyte 6850 900MHz
Processor: i5 2500K 4.8GHz
Mainboard: MSI P67A-GD53
Memory: 4GB XMS3 1600MHz
Soundcard: RealTek HD 7.1
PSU: OCZ StealthXStream 600W
Default 07-22-2009, 08:20 | posts: 6,118 | Location: NSW Australia

That was one of the things I noticed about the OP850, "precision manufactured by robotics". The OP850-P does not mention this, so this could be one of the PSUs made by hand? Is there a way to recognise an Impervio? IE: Model numbers? Distinctive PCB?

There are a few others I like, such as OCZ Z Series, but they are unavailable in Australia.

And, after a look through the 80+ list, only a couple of PSUs I can recognise as being "reputable" have been given a Bronze or higher rating, and they are 1000Watters.

How about Gigabyte Odins? Do they have anything special?

Last edited by inklimited; 07-22-2009 at 08:25.
   
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  (#82)
Makalu
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Videocard: EVGA 8800 Ultra
Processor: Intel C2D E8500
Mainboard: Asus P5Q
Memory: G.Skill 2x1gb PC28500
Soundcard: Audigy LS/ Logitech THX 5
PSU: Gigabyte Odin GT 550W
Default 07-22-2009, 13:53 | posts: 4,197 | Location: Eugene, Oregon

I'm not sure if I'd read too much into the absence of the "made by robots" in the P model marketing info or not. Haven't seen a label shot but the interior is the same Impervio design. The units assembled at Etasis use the same components as the ones assembled at Quasar IS and really if you had to pick another OEM for the job then I can't think of a better choice than Etasis...they have a long history of building sturdy industrial/server grade units. Anyway, the label would say made in China instead of Taiwan if that is the case but again I've not seen a label yet for the P's.

Possibly the only company not fudging with their 80+ samples in Enermax but I have other issues with them....namely about half of their models turn out to have fatal design flaws that take awhile to show...time will tell.

Gigabyte Odin GT with the software control is special yes...it's the only PSU that puts the unit where we want it. Under the supervision and control of the computer like every other component instead of being something apart and untouchable. They weren't marketed well at all...if they had perfected the software bugs before releasing the units and could lower the price a bit I think they would have sold like hotcakes and other OEMs would have jumped on the bandwagon. I still think in the future this will be the norm though.
   
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  (#83)
ati666
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Videocard: Gigabyte R9-290x Windforc
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Default 08-08-2009, 00:59 | posts: 465

thanks makalu for the info,

i need to know if i need a new power supply cuz i am deciding to change from 8800gts512 to gtx285, my current specs r these

e8500
abit aw9d-max (i975)
8 gb ram
x-fi extreme music
8800gts512
dvd -/+ rw
2 seagate baracudas
intex 600watt power supply

should i upgrade or not?.....
   
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  (#84)
DSK
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Videocard: HD5770/BenQ G2220HD
Processor: E6300 @ 4Ghz
Mainboard: Gigabyte - GA-EP43T-UD3L
Memory: Sector Five @ 1333CAS7
Soundcard: Realtek 81xx
PSU: Silverstone 500w
Default 08-08-2009, 01:20 | posts: 17,926 | Location: Coldwells,UK

Can someone help me fine a 8pin cpu power extender cable please in the uk
   
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  (#85)
Makalu
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Videocard: EVGA 8800 Ultra
Processor: Intel C2D E8500
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Memory: G.Skill 2x1gb PC28500
Soundcard: Audigy LS/ Logitech THX 5
PSU: Gigabyte Odin GT 550W
Default 08-08-2009, 01:52 | posts: 4,197 | Location: Eugene, Oregon

Quote:
Originally Posted by ati666 View Post
thanks makalu for the info,

i need to know if i need a new power supply cuz i am deciding to change from 8800gts512 to gtx285, my current specs r these

e8500
abit aw9d-max (i975)
8 gb ram
x-fi extreme music
8800gts512
dvd -/+ rw
2 seagate baracudas
intex 600watt power supply

should i upgrade or not?.....
I'm not familiar with Intex brand PSU's and could only find specs on this "450W" one here:

http://www.intextechnologies.com/web...S&subcat1=SMPS

That's an outdated design and over-rated by about 100W so I'm not very hopeful for the 600W version but if you can give me the information off the label on yours I'll let you know what I think.
   
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  (#86)
Makalu
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Videocard: EVGA 8800 Ultra
Processor: Intel C2D E8500
Mainboard: Asus P5Q
Memory: G.Skill 2x1gb PC28500
Soundcard: Audigy LS/ Logitech THX 5
PSU: Gigabyte Odin GT 550W
Default 08-08-2009, 01:59 | posts: 4,197 | Location: Eugene, Oregon

Quote:
Originally Posted by kylzer View Post
Can someone help me fine a 8pin cpu power extender cable please in the uk
http://www.scan.co.uk/Products/Silve...20plus4-20-Pin

comes with a 24pin adapter too but I've found the price on these is as low as an 8-pin extender alone and the quality is very good 16 gauge wiring
   
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  (#87)
DSK
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Videocard: HD5770/BenQ G2220HD
Processor: E6300 @ 4Ghz
Mainboard: Gigabyte - GA-EP43T-UD3L
Memory: Sector Five @ 1333CAS7
Soundcard: Realtek 81xx
PSU: Silverstone 500w
Default 08-08-2009, 02:19 | posts: 17,926 | Location: Coldwells,UK

Quote:
Originally Posted by Makalu View Post
http://www.scan.co.uk/Products/Silve...20plus4-20-Pin

comes with a 24pin adapter too but I've found the price on these is as low as an 8-pin extender alone and the quality is very good 16 gauge wiring
Nice thank you
   
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  (#88)
DSK
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Videocard: HD5770/BenQ G2220HD
Processor: E6300 @ 4Ghz
Mainboard: Gigabyte - GA-EP43T-UD3L
Memory: Sector Five @ 1333CAS7
Soundcard: Realtek 81xx
PSU: Silverstone 500w
Default 08-15-2009, 05:34 | posts: 17,926 | Location: Coldwells,UK

Quick Question

I'm guessing my psu could handle a 3 gpu ? (8800GT)

i will be folding 24-7 well mostly.
   
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  (#89)
Makalu
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Videocard: EVGA 8800 Ultra
Processor: Intel C2D E8500
Mainboard: Asus P5Q
Memory: G.Skill 2x1gb PC28500
Soundcard: Audigy LS/ Logitech THX 5
PSU: Gigabyte Odin GT 550W
Default 08-15-2009, 23:06 | posts: 4,197 | Location: Eugene, Oregon

Quote:
Originally Posted by kylzer View Post
Quick Question

I'm guessing my psu could handle a 3 gpu ? (8800GT)

i will be folding 24-7 well mostly.
yeah that wouldn't be too much for it or excessive
   
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  (#90)
DSK
Banned
 
Videocard: HD5770/BenQ G2220HD
Processor: E6300 @ 4Ghz
Mainboard: Gigabyte - GA-EP43T-UD3L
Memory: Sector Five @ 1333CAS7
Soundcard: Realtek 81xx
PSU: Silverstone 500w
Default 08-19-2009, 15:33 | posts: 17,926 | Location: Coldwells,UK

Ok another question best out of theses

http://www.ebuyer.com/product/168476
http://www.ebuyer.com/product/150431
http://www.ebuyer.com/product/164951
http://www.ebuyer.com/product/129034
   
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  (#91)
Makalu
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Videocard: EVGA 8800 Ultra
Processor: Intel C2D E8500
Mainboard: Asus P5Q
Memory: G.Skill 2x1gb PC28500
Soundcard: Audigy LS/ Logitech THX 5
PSU: Gigabyte Odin GT 550W
Default 08-19-2009, 15:51 | posts: 4,197 | Location: Eugene, Oregon

I like the CM Real Power M1000 and the Corsair HX850 best out of those. The Be Quiet is not too shabby either. The OCZ is a new and untested thang...no reason to risk that IMO.
   
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  (#92)
DSK
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Videocard: HD5770/BenQ G2220HD
Processor: E6300 @ 4Ghz
Mainboard: Gigabyte - GA-EP43T-UD3L
Memory: Sector Five @ 1333CAS7
Soundcard: Realtek 81xx
PSU: Silverstone 500w
Default 08-20-2009, 18:28 | posts: 17,926 | Location: Coldwells,UK

Cheers i picked up the HX850, The coolermaster would take up to 5 days to come that was to long of a wait for me lol.
   
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  (#93)
wlw_wl
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Videocard: Sapphire 6850 non-Toxic
Processor: Phenom II x4 955 BE
Mainboard: ASRock 870 Extreme3
Memory: GeIL DDR3 4GB 1600MHz CL8
Soundcard: Onboard Realtek HDAudio
PSU: OCZ MXS Pro 600W
Default 09-30-2009, 12:47 | posts: 864 | Location: Poland, Poznan

Quote:
Originally Posted by Makalu View Post
recommended 75% load
Where does that recommendation come from?
Most PSUs are the most efficient at about 80% load.

A great place to research PSU quality is
http://www.hardwaresecrets.com/page/power
as they examine PSUs in realy little detalis (literally) and properly test their real power and efficiency.

For example you can find why OCZ ProXStream 1000 W is a PSU to be avoided at all costs (overheating and noisy voltage) and that Zalman ZM600-HP 600 W is a great PSU that can deliver up to whopping 740W just fine and is over 80% efficient all the way from 20% to 100% load.
The Zalman is the one I'd get (and actually the one I'm getting).
   
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  (#94)
Makalu
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Videocard: EVGA 8800 Ultra
Processor: Intel C2D E8500
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Memory: G.Skill 2x1gb PC28500
Soundcard: Audigy LS/ Logitech THX 5
PSU: Gigabyte Odin GT 550W
Default 09-30-2009, 13:33 | posts: 4,197 | Location: Eugene, Oregon

That recommendation comes from me it would appear. You're not going to see any significant difference in efficiency between 75% and 80% load.

I've read all of Gabe's PSU reviews...thanks. The Zalman 600 is a decent group regulated PSU...one of the better FSP Epsilons but we have seen some problems with those and the newer high-end cards due to the 16A OCP limits.
   
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  (#95)
wlw_wl
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Videocard: Sapphire 6850 non-Toxic
Processor: Phenom II x4 955 BE
Mainboard: ASRock 870 Extreme3
Memory: GeIL DDR3 4GB 1600MHz CL8
Soundcard: Onboard Realtek HDAudio
PSU: OCZ MXS Pro 600W
Default 09-30-2009, 14:52 | posts: 864 | Location: Poland, Poznan

Well as I see there in test it's 25.5A drawn from +12V1 and 17.5A from +12V2 so I'd say it's plenty.
   
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  (#96)
Makalu
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Videocard: EVGA 8800 Ultra
Processor: Intel C2D E8500
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Memory: G.Skill 2x1gb PC28500
Soundcard: Audigy LS/ Logitech THX 5
PSU: Gigabyte Odin GT 550W
Default 09-30-2009, 15:55 | posts: 4,197 | Location: Eugene, Oregon

Quote:
Originally Posted by wlw_wl View Post
Well as I see there in test it's 25.5A drawn from +12V1 and 17.5A from +12V2 so I'd say it's plenty.
no that's not right...it's a four rail unit and Gabe's Sunmoon tester is only designed for two rail units so he has to combine connectors from different rails. You can see his OCP results on the next page which were 18A and that's been a problem. The other 600W Epsilons OCP limits vary between upper 20's and lower 30's and those work fine with the high end cards.
   
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  (#97)
wlw_wl
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Videocard: Sapphire 6850 non-Toxic
Processor: Phenom II x4 955 BE
Mainboard: ASRock 870 Extreme3
Memory: GeIL DDR3 4GB 1600MHz CL8
Soundcard: Onboard Realtek HDAudio
PSU: OCZ MXS Pro 600W
Default 09-30-2009, 17:02 | posts: 864 | Location: Poland, Poznan

Okay, I have no reason to argue.
BTW: Gabriel's a badass! He should test the PSUs using his Tae Kwon Do, there would be no mistakes then!
   
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  (#98)
viren
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Videocard: GTX 960
Processor: I5 4690K
Mainboard: Z87
Memory: 16GB
Soundcard: 7.1 PCI-E
PSU: 800W
Default 10-13-2009, 21:22 | posts: 2,443 | Location: PUNE

Hi Makalu,

This is my current rig,

C2Q Q9550 @ 3.40Ghz,
ASUS P5N-T Deluxe [780i Sli],
OCZ 4Gb 1000Mhz Sli Ready Ram,
Gigabyte GTX285 oc to G-675, M-350, S-1537. [Default G-648, M-1242, S-1476].
Western Digital Caviar Black 500Gb,
Sound Blaster X-Fi Xtreme Audio,
Cooler Master CM690 Case,
Cooler Maaster Real Power Pro 850W,
Samsung SyncMaster P2350[1920 X 1080].
Windows 7 64 Bit.

I want to update my power supply for a simple reason that i cannot manage the cables properly. They are spread everywhere in the case.

Since I am gettin a good deal for Cooler Master Silent Pro M700 psu how good is this psu for GTX 285? Can it handle my rig? Also im not going to Sli in the near future. The amp rating for that psu is 50A.

http://www.coolermaster.com/product....roduct_id=4202

I wont be getting rid of my old psu, it will go in my office rig.

Please help asap.

Thanks,

Virendra.

[Sorry i have no time to read your whole thread but you have done an awesome job.]
   
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  (#99)
Makalu
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Videocard: EVGA 8800 Ultra
Processor: Intel C2D E8500
Mainboard: Asus P5Q
Memory: G.Skill 2x1gb PC28500
Soundcard: Audigy LS/ Logitech THX 5
PSU: Gigabyte Odin GT 550W
Default 10-14-2009, 02:00 | posts: 4,197 | Location: Eugene, Oregon

Quote:
Originally Posted by virendra View Post
Hi Makalu,


Since I am gettin a good deal for Cooler Master Silent Pro M700 psu how good is this psu for GTX 285? Can it handle my rig? Also im not going to Sli in the near future. The amp rating for that psu is 50A.

]
yeah the M700 will handle your system just fine
   
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  (#100)
viren
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Videocard: GTX 960
Processor: I5 4690K
Mainboard: Z87
Memory: 16GB
Soundcard: 7.1 PCI-E
PSU: 800W
Default 10-14-2009, 11:01 | posts: 2,443 | Location: PUNE

Quote:
Originally Posted by Makalu View Post
yeah the M700 will handle your system just fine
Thanks Makalu, the psu is on its way. Will let know how it performs.
   
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