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OCZ Fatal1ty 750w PSU question

post #1 of 10
Thread Starter 
Hey guys,

I know I know, another thread on a psu, but I had a quick question for everyone.

So my current PSU is not good for my pc. It doesn't shutdown but my 580 cannot get past 930MHz or else it crashes and the lights in the case dim/flicker when under heavy load, so yea I'm concerned enough that I need a new PSU.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817341041
So I'm going to get this OCZ Fatal1y 750w psu. Hopefully its future proof too. I don't expect to be increasing my watts a huge amount. I can't SLI but yea, I'm not worried about that.

I'm moving to a modular PSU, so I'm excited about that, no more of this:
450

Here's my question:

I see there's 12V1 12V2 12V3 12V4 and they're all rated at 18amps.... so my question, Am I going to have any problems running my 580 on this? So basically since I'll only be running a 6+8pin to my 580 I'll only be using 2 rails, but does that mean I can't exceed 18amps per rail?

Hopefully someone can explain this to me because all I see is 18amps per rail but a total of 650w for all 12v, so which should I go by?


Thanks Guys! Always so great on OCN
post #2 of 10
For that king of money I would much rather get a Corsair HX650. It will be more than capable of handling anything your current rig can throw at. Very reliable and exccellent RMA service just in case. 750w is not neccessary.
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Tevatron K
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post #3 of 10
Thread Starter 
Hm. The HX650 is lower total watts though. My question is regarding the amps per rail...so I'll be ok getting this and running a card that pulls 20+amps on a 12v rail?
post #4 of 10
I would have to agree with above you would do better with a Corsair HX series or PC Power & Cooling

Check out the OCN PSU calculator up in the sticky it gives great info on watts you need and what are good suggestions on psu

Also HX 650 pulls 54 amps on +12v
Edited by iXVapcer4782Xi - 4/20/12 at 4:00pm
    
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post #5 of 10
That Xigmatek does have pretty horrible reviews.... before I looked it up I was going to suggest that maybe it wasn't the problem, but even if it's not you should replace it. I didn't find anything on that exact model, but many similar models were tested and shown to have a high amount of voltage instability under load(hence the flickering lights) Although I don't think it's holding back your overclock a poor quality PSU like that is just an accident waiting to happen.

I've run a system nearly identical to yours with the i5 2500k at 4.7GHZ and the GTX 480(a bit higher power consumption than that 580) overclocked to 895 MHZ core. It ran fine on a cheap Antec 520 Neo Eco power supply.(no flickering, instability, or even audible fan noise running Furmark+Prime 95)

You need a good name brand much more than you need to spend X number of dollars.
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Ginormous M-ITX
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post #6 of 10
Thread Starter 
Ok. Yea, the flickering lights is a huge red flag in my book.

Hows the Rosewill HIVE series 750w psu? It's 54amp @ 12v rail too. It's got pretty good review on it...
post #7 of 10
They have strong support on this forum I know, and google appears to agree.
http://www.guru3d.com/article/rosewill-hive-750-watt-psu-review/7
Ginormous M-ITX
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Ginormous M-ITX
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Girlfriend's Rig
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Hard DriveHard DriveCoolingMonitor
Patriot Pyro Hitachi - 2.5" Custom Loop - made from 2 Thermaltake Water 2.0... Auria 27" 1440P 
PowerCaseMouse
PC Power and Cooling 600W Modular Bitfenix Prodigy Microsoft Sidewinder 
CPUMotherboardGraphicsRAM
intel g850 MSI P67s c43 EVGA Geforce GTX 480 G skill 
Hard DriveOptical DriveCoolingOS
Patriot Pyro LG DVD Antec 620 7 
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post #8 of 10
Thread Starter 
Went ahead and got the HIVE 750w PSU. I couldn't passup the price and modular design. It has good reviews too!

Thanks for the help guys!
post #9 of 10
NP

Don't expect a better overclock but I would feel a lot better with a well reviewed power supply. No one wants to see their power supply go up in smoke, and they can take your other components down with them if they fail catastrophically. I'm happy every time someone learns about the importance of a quality power supply.

Not to mention modular cabling is always worth it. thumb.gif
Ginormous M-ITX
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Girlfriend's Rig
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CPUMotherboardGraphicsRAM
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Hard DriveHard DriveCoolingMonitor
Patriot Pyro Hitachi - 2.5" Custom Loop - made from 2 Thermaltake Water 2.0... Auria 27" 1440P 
PowerCaseMouse
PC Power and Cooling 600W Modular Bitfenix Prodigy Microsoft Sidewinder 
CPUMotherboardGraphicsRAM
intel g850 MSI P67s c43 EVGA Geforce GTX 480 G skill 
Hard DriveOptical DriveCoolingOS
Patriot Pyro LG DVD Antec 620 7 
MonitorKeyboardPowerCase
KDS 22" k120 logitech Antec Neo Eco 520W Azza Triton 401 
Mouse
Sidewinder X8 
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Ginormous M-ITX
(11 items)
 
Girlfriend's Rig
(13 items)
 
 
CPUMotherboardGraphicsRAM
i5 2500k Asrock Z77E-ITX AMD Radeon HD 7970 ASUS DC2T Samsung Green DDR3 
Hard DriveHard DriveCoolingMonitor
Patriot Pyro Hitachi - 2.5" Custom Loop - made from 2 Thermaltake Water 2.0... Auria 27" 1440P 
PowerCaseMouse
PC Power and Cooling 600W Modular Bitfenix Prodigy Microsoft Sidewinder 
CPUMotherboardGraphicsRAM
intel g850 MSI P67s c43 EVGA Geforce GTX 480 G skill 
Hard DriveOptical DriveCoolingOS
Patriot Pyro LG DVD Antec 620 7 
MonitorKeyboardPowerCase
KDS 22" k120 logitech Antec Neo Eco 520W Azza Triton 401 
Mouse
Sidewinder X8 
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post #10 of 10
Thread Starter 
Quote:
Originally Posted by Subcutaneous View Post

NP
Don't expect a better overclock but I would feel a lot better with a well reviewed power supply. No one wants to see their power supply go up in smoke, and they can take your other components down with them if they fail catastrophically. I'm happy every time someone learns about the importance of a quality power supply.
Not to mention modular cabling is always worth it. thumb.gif

Exactly, that's my #1 worry with the flickering. It's going to blow. I've had my card overclocked for awhile but I think I'm going to revert it back to stock volts. I don't wanna risk a $1k+ PSU failure...
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