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Confused with PSU'S, Power Recommendation - Page 2

post #11 of 28
Quote:
Originally Posted by SFixic View Post

Thanks you, 750W? Do you think that's enough, with only 150W more? It's highly unstable as it is now, and the power consumption of one 6970 is 25W idle and about 300W in maximum usage, give or take.
I have a Corsair 600W now.

The rosewill hive will handle that set up just fine. No need to spend more. On top of that if u ever upgrade in the future you don't have to worry because all computer parts are becoming more efficient! and requires much less power! thumb.gif
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post #12 of 28
Quote:
Originally Posted by ghostrider85 View Post

a GOOD 750w PSU will suffice for dual GPU setup, see my sig rig, i'm only using 650w PSU, i have 5 hard drives, water pump, leds, cpu and gpu are overclocked, bunch of fans etc.

The hive series are quality PSUs... There are better though.
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Queso Fresco
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post #13 of 28
Thread Starter 
Unstable as in computer slowing down, freezing, crashing etc.

My 600W PSU kan handle the system at idle but not with gaming and so on, I only run 1 6970 now and with no overclocking, so it's stable for now ^_^
post #14 of 28
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post #15 of 28
Thread Starter 
Thanks for all the help smile.gif

I will look in to them.

I'm completely sure you know what you're talking about, but I'm still a bit skeptic to only 750W.
It's not a big leap from what I have. Or it's more of a leap then I understand wink.gif

I would like to have some safety margins.
post #16 of 28
Quote:
Originally Posted by SFixic View Post

"
Thank you for the quick reply. I have attached the image from the calculator.
I have a 600W PSU now and I had to take out one of the 6970's because it was very unstable.

 

You're welcome.  Here's another calculation with more realistic results using more realistic settings.  However, I need to mention that the calculator is likely inaccurate regarding how many watts the CPU is to pull when overclocked.  One of the biggest factors is whether or not it's using the correct stock core voltage, and so far I've found that it can be way off which can make for differences of 50W or more in some cases.

 

Anyway, here are what I would consider more realistic results with more realistic settings (note:  I don't know if 1.5V is realistic or not for 4.0 GHz, so I'm leaving it at 1.5V):

 

 

(click the image for the full size version)

 

Now, AMD recommends a 550W power supply to power a system that has just one 6970 in it which means that they would be recommending a 650W to power a system that has two in it.  However, they are taking into consideration the possible purchase or ownership of a generic PSU.  Most generic 650W power supplies have a much lower capacity than a quality 650W power supply due to what the PSU is rated for.  A 650W generic PSU is rated for its peak capacity which can really only be sustained for about 1-2 seconds while a quality 650W is rated for a continuous delivery of 650W.  So that means its peak is much higher which means that a quality 650W unit should be plenty.

 

However, if this PSU calculator is accurate at all (which I am doubting), then I can say that any quality 750W power supply would be plenty because it is recommending a PSU that can deliver 687W.  This still feels like it's inaccurate on the high side to me, but I am a little bit short on time at the moment to do extra research.

 

Where can you order a PSU from, and what is your PSU budget?


Edited by TwoCables - 8/30/12 at 3:23am
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It's a computer!
(18 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveOptical DriveOptical Drive
250 GB Samsung 840 EVO (OS) 3 TB Toshiba P300 (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
CoolingOSMonitorKeyboard
Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
PowerCaseMouseMouse Pad
Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
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X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #17 of 28
If you buy one and it's still not enough..(which I highly doubt) then just grab an 850 from the same brand and series. thumb.gif
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Queso Fresco
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post #18 of 28
Thread Starter 
Hi.

The correct voltage for the overclock am I rather uncertain of as I'm at work right now, but the standard is about 1.315 if my memory serves me right.
I live in Sweden so I don't have that many stores to choose from, but I'll direct link to the PSU section.

http://www.inet.se/kategori/595/nataggregat
http://www.komplett.se/k/kl.aspx?bn=10061

The prices are in SKR.
1 USD = 7 SKR

My budget is what it needs to be ^_^
I need my system running fine. There's no cutting corners when it comes to technology wink.gif
post #19 of 28
post #20 of 28
Quote:
Originally Posted by SFixic View Post

Hi.
The correct voltage for the overclock am I rather uncertain of as I'm at work right now, but the standard is about 1.315 if my memory serves me right.
I live in Sweden so I don't have that many stores to choose from, but I'll direct link to the PSU section.
http://www.inet.se/kategori/595/nataggregat
http://www.komplett.se/k/kl.aspx?bn=10061
The prices are in SKR.
1 USD = 7 SKR
My budget is what it needs to be ^_^
I need my system running fine. There's no cutting corners when it comes to technology wink.gif

 

Thank you for linking directly to the PSU section on their sites!

 

Do you know whether or not you want a modular PSU?

It's a computer!
(18 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveOptical DriveOptical Drive
250 GB Samsung 840 EVO (OS) 3 TB Toshiba P300 (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
CoolingOSMonitorKeyboard
Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
PowerCaseMouseMouse Pad
Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
AudioAudio
X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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It's a computer!
(18 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveOptical DriveOptical Drive
250 GB Samsung 840 EVO (OS) 3 TB Toshiba P300 (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
CoolingOSMonitorKeyboard
Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
PowerCaseMouseMouse Pad
Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
AudioAudio
X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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Reply
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