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Need advice on new PSU...,

post #1 of 13
Thread Starter 
OK, first time posting so here goes:

I'm planning to upgrade my gpu from a gtx 275 to (2)xfx 6970(s). My current setup is as follows:

Intel i7 930 (OC'd 3.5GHz)
Corsair H50 High Performance CPU cooler
Asus P6t-SE
BFG GTX 275 OC 896
1(TB) SATA Hitachi HD
1(TB)SATA Western Digital HD
500(GB)SATA Seagate HD
Kingston 6gig(3 x 2048 DDR3)Triple Memory
Asus Xonar D2 sound card
DVDRW Liteon
DVDRW Sony
LG Blu-ray Rewriter1080)
Lycosa Razer Keyboard
Antec P193 Performance Case
Antec True Power 650P
Samsung 24" 1080P(1920x
Lycosa Death Adder mouse
SennHeiser Headphones
Win 7 Ultimate x64

I currently have a 650watt psu that handles my system pretty well. Amd's recommends a 550 or greater psu for one but what would I need for 2 in crossfire? Here are some I've been looking at so far:

Enermax 85+ 1020w
Antec TruePower 850

Should I go with a continuous or peak psu? Modular or non-modular?
I'm not sure if a continuous psu will help my system and I would like some advise on the mod, non-mod question. Any help would be appreciated.
Citadel
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Hard DriveOptical DriveOSMonitor
1xHitachi 1Tb/1TB WD LG Blueray rewritable Windows 7 Ultimate 64bit Samsung 24" 1920x1080 
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Citadel
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i7 930 OC'd (3.75) Asus P6T-SE X58 EVGA GTX590 Classified Kingston DDR3-SDRAM PC3-10700)6gigs 
Hard DriveOptical DriveOSMonitor
1xHitachi 1Tb/1TB WD LG Blueray rewritable Windows 7 Ultimate 64bit Samsung 24" 1920x1080 
KeyboardPowerCaseMouse
Razer Lycosa SeaSonic 850 X-Series Antec 193 Performance Razer "Death Adder" 
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post #2 of 13
For this system with two 6970s in Crossfire, a quality 700-750W would be enough (more than enough, actually). To keep it simple, I personally recommend the 750W Antec TruePower New because it's a quality unit at a very low price. Plus, it's partially modular which is nice.

But regarding modular vs. non-modular: that's a personal decision. Some people prefer it while others just don't care.

I'm tempted to say that even Antec's 650W TruePower New would be fine, but I believe that it might be cutting it too close under maximum load. But to be sure, Antec's 850W TruePower New is unnecessary overkill.

How much money can you put towards a power supply?
It's a computer!
(19 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 DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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It's a computer!
(19 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 DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #3 of 13
SeaSonic X750. Was recommened to me.

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post #4 of 13
Thread Starter 
I plan to spend between $130 - $200.00, I want to make sure I have a solid psu to power my investment. Doesn't make any sense to by a cheap psu at this point.
Citadel
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 930 OC'd (3.75) Asus P6T-SE X58 EVGA GTX590 Classified Kingston DDR3-SDRAM PC3-10700)6gigs 
Hard DriveOptical DriveOSMonitor
1xHitachi 1Tb/1TB WD LG Blueray rewritable Windows 7 Ultimate 64bit Samsung 24" 1920x1080 
KeyboardPowerCaseMouse
Razer Lycosa SeaSonic 850 X-Series Antec 193 Performance Razer "Death Adder" 
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EVGA Classified Asus Xonar D2  
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Citadel
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 930 OC'd (3.75) Asus P6T-SE X58 EVGA GTX590 Classified Kingston DDR3-SDRAM PC3-10700)6gigs 
Hard DriveOptical DriveOSMonitor
1xHitachi 1Tb/1TB WD LG Blueray rewritable Windows 7 Ultimate 64bit Samsung 24" 1920x1080 
KeyboardPowerCaseMouse
Razer Lycosa SeaSonic 850 X-Series Antec 193 Performance Razer "Death Adder" 
Mouse PadAudio
EVGA Classified Asus Xonar D2  
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post #5 of 13
Quote:
Originally Posted by sarojz View Post
I plan to spend between $130 - $200.00, I want to make sure I have a solid psu to power my investment. Doesn't make any sense to by a cheap psu at this point.
Does it ever make sense to buy a cheap PSU?

Anyway, if you can afford the SeaSonic X-650 or 750, then go for it. These are the best of the best 650W and 750W power supplies right now. Plus, they are fully modular. Power supplies like the TruePower New are partially modular while units like the Corsair HX650 are just... modular ("normally modular", perhaps), but the X-Series by SeaSonic are fully modular.

Fortunately, both of these models are in your price range! The X-750 at Newegg is $150.99 + $5.99 shipping while the X-650 is $134.99 + 4.99 shipping. So I say that if you can afford it, then go for it!

Here's an excerpt from a power supply article here on OCN called "On SeaSonic" (meaning, this is is article on SeaSonic):

Quote:
Originally Posted by Phaedrus2129 View Post

SeaSonic X - When someone says "SeaSonic makes the best power supplies", this is what they're thinking of. The SeaSonic X-650 and X-750 are the best 650W and 750W power supplies are on the market. Their voltage regulation is amazingly good, they are 80+ Gold certified, they have ridiculously low noise/ripple levels, are fanless up to 20% of their load level, and are fully modular to boot. The only downside is their price tag: $170 and $180 respectively. Why the 750W only costs $10 more I don't know, but hey.

Further Reading

Edited by TwoCables - 1/6/11 at 2:09am
It's a computer!
(19 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 DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
  hide details  
Reply
It's a computer!
(19 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 DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
  hide details  
Reply
post #6 of 13
Thread Starter 
@TwoCables

OK, sounds like you recommend the Antec 750watt true power psu and sy it's more than enough but I have the Antec 650 already, that doesn't seem to be much of a jump in power. The Antec Power supply Calculator recommends a 1335 continuous watt PSU. I seem to remember Enermax being the top of the line power supply but they cost an arm & leg.
Citadel
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 930 OC'd (3.75) Asus P6T-SE X58 EVGA GTX590 Classified Kingston DDR3-SDRAM PC3-10700)6gigs 
Hard DriveOptical DriveOSMonitor
1xHitachi 1Tb/1TB WD LG Blueray rewritable Windows 7 Ultimate 64bit Samsung 24" 1920x1080 
KeyboardPowerCaseMouse
Razer Lycosa SeaSonic 850 X-Series Antec 193 Performance Razer "Death Adder" 
Mouse PadAudio
EVGA Classified Asus Xonar D2  
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Citadel
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 930 OC'd (3.75) Asus P6T-SE X58 EVGA GTX590 Classified Kingston DDR3-SDRAM PC3-10700)6gigs 
Hard DriveOptical DriveOSMonitor
1xHitachi 1Tb/1TB WD LG Blueray rewritable Windows 7 Ultimate 64bit Samsung 24" 1920x1080 
KeyboardPowerCaseMouse
Razer Lycosa SeaSonic 850 X-Series Antec 193 Performance Razer "Death Adder" 
Mouse PadAudio
EVGA Classified Asus Xonar D2  
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post #7 of 13
Quote:
Originally Posted by sarojz View Post
@TwoCables

OK, sounds like you recommend the Antec 750watt true power psu and sy it's more than enough but I have the Antec 650 already, that doesn't seem to be much of a jump in power. The Antec Power supply Calculator recommends a 1335 continuous watt PSU. I seem to remember Enermax being the top of the line power supply but they cost an arm & leg.
1335W would power your rig with about four GTX 580s in it, overclocked.

Now generally speaking, PSUs that only show the Continuous rating are better than PSUs that only show a Peak rating.

Anyway, I have something to say regarding the PSU calculator: try to avoid using any PSU calculator on the internet because you have Overclock.net at your disposal.

But if you insist on using one, then be absolutely sure to use the following settings (choosing other settings could result in grossly incorrect results):
  • System Type: - 1 physical CPU (it does not matter how many cores there are)
  • Motherboard: - High End - Desktop
  • CPU Utilization (TDP): - Leave this at 90% because anything above this is unrealistic, even for overclocking and stress testing.
  • Overclock my CPU! - If you choose this, then consult Overclock.net for voltage values first.
  • RAM: - 3 Sticks DDR3 SDRAM
  • FB DIMMs: - You don't have FB DIMMs
  • Video Type: - Crossfire
  • Hard Drives: - Choose 3 "Regular SATA" HDDs
  • PCI Cards: Choose "Sound Blaster - All Models" because there isn't much of a difference in power draw.
  • Additional PCI Card (avg): - Only select this if you have some type of PCI card that is not mentioned in this PSU calculator. It looks to me like you have none, so don't choose anything here.
  • Additional PCI Express Cards: -Don't choose anything here unless you have some kind of PCI-E card that's not mentioned in this PSU calculator (this has nothing to do with video cards or sound cards).
  • External Devices: -
    • USB: This one has nothing to do with the keyboard and mouse. It can only apply to devices that draw power, such as maybe charging up a cell phone on the USB port.
    • FireWire: Same as above: it must draw power from the system.
  • Power Supply Adjustments
    • System Load: - Unless you're folding on both the CPU and the graphics card(s) at the same time, set this to 75% or 80%. "System Load" refers to every single part of the system, right down to the smallest detail. It includes all drives, all cards, memory, CPU, fans.... just everything.
    • Capacitor Aging:: If you choose anything, then choose 10%.


Even though PSU calculators are never accurate, it is still critical that you are careful with all of the above settings as well as the rest.
Edited by TwoCables - 1/6/11 at 10:37am
It's a computer!
(19 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 DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
  hide details  
Reply
It's a computer!
(19 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 DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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Reply
post #8 of 13
I don't know how you managed to get 1335W from Antec's power supply calculator (which by the way is basically the same as http://extreme.outervision.com/psucalculatorlite.jsp) but that's totally ridiculous. Your system would run great on a good 750W unit.

Please ignore the whole continuous/peak terminology. A good PSU rated for x amount of watts will be able to put out about that amount of power continuously. Peak is a bull**** marketing term that should raise a red flag.
post #9 of 13
Thread Starter 
Well I have to admit I set the Antec calculator incorrectly after looking at TwoCables recommendation for the power calculator, that may explain why I got that wacky reading. Thank you for the calc settings especially the "system Load", I do in fact have Einstein@home and Gpugrid running on my system. Because of this and future considerations I will purchase an Antec 850 new.

Again thank you TwoCables and overClockers.net for the great website and priceless advice I find here.
Citadel
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 930 OC'd (3.75) Asus P6T-SE X58 EVGA GTX590 Classified Kingston DDR3-SDRAM PC3-10700)6gigs 
Hard DriveOptical DriveOSMonitor
1xHitachi 1Tb/1TB WD LG Blueray rewritable Windows 7 Ultimate 64bit Samsung 24" 1920x1080 
KeyboardPowerCaseMouse
Razer Lycosa SeaSonic 850 X-Series Antec 193 Performance Razer "Death Adder" 
Mouse PadAudio
EVGA Classified Asus Xonar D2  
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Citadel
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 930 OC'd (3.75) Asus P6T-SE X58 EVGA GTX590 Classified Kingston DDR3-SDRAM PC3-10700)6gigs 
Hard DriveOptical DriveOSMonitor
1xHitachi 1Tb/1TB WD LG Blueray rewritable Windows 7 Ultimate 64bit Samsung 24" 1920x1080 
KeyboardPowerCaseMouse
Razer Lycosa SeaSonic 850 X-Series Antec 193 Performance Razer "Death Adder" 
Mouse PadAudio
EVGA Classified Asus Xonar D2  
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post #10 of 13
I heard many good things about seasonic, so I say seasonic too.
    
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Intel i3 540 P7H55M-Pro XFX 6770 OCZ Platinum 
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OCZ Vertex 2E  Samsung F4 Maxtor DiamondMax 23 LG Super-multi Drive 
CoolingOSMonitorKeyboard
Coolermaster Hyper212+ Microsoft Windows 7 Professional 64-bit LG W2361V Razer Tarantula 
PowerCaseMouseMouse Pad
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