Monday, September 16th 2013

Why Settle for 1500W When You Can Get 2000W in a 20 cm Long PSU?

Chinese PSU OEM Great Wall unveiled a new 2,000-Watt power supply under its own channel brand (model: GW-EPS2000DA). Built in the 20 cm-long ATX form-factor, the PSU features a 90 - 265V input range, and is 80 Plus Gold-qualified (certification pending). It complies with EPS 2.92 standard, and supports low-power C-states on Core "Haswell" processors. Its maximum power output, however, depends on its input voltage. When plugged into 90 - 120VAC lines (US, Japan, Canada, etc.,) it caps out at 1600W. When plugged into 210 - 265VAC lines (EMEAI, Greater China, etc.,) it belts out its maximum 2000W.

Connectivity on this fully-modular PSU includes a 24-pin ATX, four (that's right, four) 8-pin EPS connectors (which can each be split to two 4-pin connectors); eight 6+2 pin PCIe connectors, nine 4-pin Molex, twelve SATA, and one 4-pin Berg connectors. The unit relies on a 140 mm temperature-controlled fan to keep cool. Great Wall is rolling out the unit in the Chinese market first, where it will command a staggering 3,998 RMB (US $654).
Source: Expreview
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49 Comments on Why Settle for 1500W When You Can Get 2000W in a 20 cm Long PSU?

#26
Frick
Fishfaced Nincompoop
FourstaffAnd where is the problem?
166A on a single rail. That is seriously welder territory. In the words of oklahomawolf of jonnyguru fame:
Say you have a hard drive. Say this hard drive has a bad SATA connector, causing a partial short. Say you have a single 12V power supply with a massive 90A 12V rail. Say this power supply's overcurrent protection doesn't trip when the short happens. Say you, say me. Say it together... er, sorry. Anyway, my point is this: in this scenario, the power supply won't shut down because it doesn't think there's a short. It will keep going. The outcome? Smoke. This actually happened to someone recently on one of the forums I frequent.
Then you'd have massive power where it shouldn't be. Yes it's rare, but to have an arc welder inside your computer case is just not necessary.
Posted on Reply
#27
Fourstaff
Frick166A on a single rail. That is seriously welder territory. In the words of oklahomawolf of jonnyguru fame:



Then you'd have massive power where it shouldn't be. Yes it's rare, but to have an arc welder inside your computer case is just not necessary.
Now that you mention welder strength current, I am quite interested in seeing reviews now, especially the ones which try to pull full load :)
Posted on Reply
#28
Frick
Fishfaced Nincompoop
FourstaffNow that you mention welder strength current, I am quite interested in seeing reviews now, especially the ones which try to pull full load :)
Aye same here. You'd need serious equipment for that though, and I hope crmaris has that equipment because I want to see 2kW in action!
Posted on Reply
#30
Prima.Vera
2K Wats full load? Easy. Just use a server mobo with dual octo-Xenons, 128 or more GB of RAM, 4 top Professional Videocards and HDDs until you got full load...
Actually I would really like to see a review of those 2K Watt power sources on full load and more. ;)
Posted on Reply
#31
ThE_MaD_ShOt
Hasn't this psu been in use since the 70's in electric chairs? :twitch::wtf:
Posted on Reply
#32
HumanSmoke
ThE_MaD_ShOtHasn't this psu been in use since the 70's in electric chairs? :twitch::wtf:
I know your post is likely sarcasm, but just for the record, electric chairs (the execution device, not that other American icon) pull around 7-12 Amps
Posted on Reply
#33
Arctucas
FrickOh you americans with your inferiour electricity. 1600W.. Hah! :rolleyes:
Here in America, any competent electrician can install a 240V circuit and receptacle outlet to plug it into...
Posted on Reply
#35
Aquinus
Resident Wat-man
ArctucasHere in America, any competent electrician can install a 240V circuit and receptacle outlet to plug it into...
Arctucas25 Ampere breaker at 120V, 20 Ampere breaker at 240V.
I think you need to read my previous post again in case you missed it. US 240v is split-phase, not single phase.
Posted on Reply
#36
The Von Matrices
Arctucas25 Ampere breaker at 120V, 20 Ampere breaker at 240V.
At least in the U.S. 20-ampere 120V outlets are pretty common in commercial establishments. I don't see why a competent electrician can't install one in a residence and use that circuit for only the power supply. 2000W, even when the voltage is low at 110V, is only 18.2A. The power supply would have to be less than 90% efficient at full load to trip a 20A circuit breaker at 110V, so it should be more than enough. Why a 20A 120V cord wasn't included is another question worth answering. Maybe the supply is limited to draw only 15A at maximum for safety reasons, no matter what cord you plug into it.
AquinusI think you need to read my previous post again in case you missed it. US 240v is split-phase, not single phase.
Completely true, but I don't see that as a problem. I just spent 30 minutes looking up power supply installations and it looks like many businesses that have small server rooms use split phase 240V with no issues at all. There are also threads in multiple forums with people experimenting with 240V split phase for their computer power supplies without problems. This might have been a problem when passive PFCs were common, but modern power supplies with active PFCs like this one can accept any combination of 90-265V and 50-60Hz without issue. I do realize that split phase is similar to double the frequency of single phase, but from this reading I infer that as long as the power supply is insulated and grounded and has an active PFC split phase power should be no hazard.
Posted on Reply
#37
cdawall
where the hell are my stars
I have run mine off of split phase 240v without issues...
Posted on Reply
#39
Aquinus
Resident Wat-man
cdawallI have run mine off of split phase 240v without issues...
Oh really? I would like to hear/see more. :)
Posted on Reply
#40
Behemot
AquinusIt's a matter of how the PSU is designed internally. The PSU expects neutral to be a constant 0v, but in split phase, it's always changing. It's the opposite of the other phase, as opposed to a steady 0v.

So even if the resultant output of split-phase looks a lot like that blue line on the bottom image, it's not working the same way to achieve that output. I don't think I would be willing to try it out.
It won't be a problem. SMPS does not use AC, it first rectifies it to DC. If you look at the graph, turn the bottom waves over 0 line and add them, you will get the same wave with double the amplitude. Only difference compared to European grid will be (despite slightly higher voltage) higher frequency of the ripple (60 vs 50 Hz).
Posted on Reply
#41
Morgoth
Fueled by Sapphire
i can see photonicinduction toying with this new psu :P
Posted on Reply
#42
Steevo
FrickOh you americans with your inferiour electricity. 1600W.. Hah! :rolleyes:
Thanks jerk!!!

:cry:


Here I sit with my rock solid 750 waiting for the day I can upgrade.:shadedshu
Posted on Reply
#43
johnspack
Here For Good!
Just add a 2nd one like I did! 1650w here... unfortunately I need it....
Posted on Reply
#44
Arctucas
AquinusI think you need to read my previous post again in case you missed it. US 240v is split-phase, not single phase.
Ever heard of a transformer?
Posted on Reply
#45
Arctucas
The Von Matrices<SNIP> 2000W, even when the voltage is low at 110V, is only 18.2A. <SNIP>

<SNIP>

National Electric Code

210.20(A) Continuous and Noncontinuous Loads. Where a branch circuit supplies continuous loads or any combination of continuous and noncontinuous loads, the rating of the overcurrent device shall not be less than the noncontinuous load plus 125 percent of the continuous load.

Therefore, a 20 Ampere breaker is undersized and the next largest breaker (25 Ampere) must be used.

Also, per Table 310.15(B)(2)(a) and 240.4 (E) thru (G), 10AWG copper conductors must be used.
Posted on Reply
#46
klepp0906
Jstn7477To quad-SLi GTX 480s. Apparently two of them can shut down an 850w PSU with an LGA 1366 processor. :wtf:

^Also FX-9590 :p
that's a negative. I ran 3 overclocked with a i7 950 also overclocked on a 850w corsair hx

Im damn certain it was working its rear off though :P Once I got my 1500w supernova I ran 4 without breaking a sweat.

the end
Posted on Reply
#47
Atomic77
This would be good for people who wanna keep there computer and keep upgrading with out ever having to worry about a big enough psu till something that needs that much comes along.
Posted on Reply
#48
Solaris17
Super Dainty Moderator
but will this PSU let my super computer play crysis?
Posted on Reply
#49
Go To Sleep
2000 seems a bit too much. 1500w is enough.
Posted on Reply
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