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800 watt+ PSU recommendations?

post #1 of 12
Thread Starter 
Im looking for a very powerful PSU to replace the one i have now. . . i used the calculator and got it around 800 watts using the specs i intend on having (less overclock and i used 2x7900's instead of 2xDX10 cards). Size really doesnt matter as im putting it in a big azz case. . . but i would like to keep it under or around 300.

Thanks for the help.
 
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post #2 of 12
The Tagan TG900-U95 900 Watt ActivePFC should be around below $300. But maybe there is something better for that price, not sure.
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post #3 of 12
Your sig rig? Don't trust the calculators too much. You really don't need 800W.

My best bet would be the PC Power & Cooling Silencer 750W for $199.99, which has a single 12V rail of 60A. That should be more than enough.

Again, I run my rig of an FSP Epsilon 700W, and mine seems to draw more power than yours.

And if you include two high-end DX10 cards.... there simply is NO PSU right now (including the 1KW units) that can handle a pair of 250W GPUs are the moment. The pair would require 500W, all on the 12V rail. That's 42A on the 12V rail, and even the PC Power & Cooling 1KW Unit does NOT deliver that on the rail dedicated to graphics (which is 36A)

The best solution is the 750W, single rail PSU, and simply add a second PSU, also single rail with about 25A or so, for the second video card./

This all assuming the DX10 cards actually draw from the PSU. I've heard things about exterrnal power and so on.
    
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post #4 of 12
Quote:
Originally Posted by Chozart
The pair would require 500W, all on the 12V rail. That's 42A on the 12V rail.
Hey Choz, how do you know that 500W of power drawn is gonna be 42A? I am not saying your wrong, I am just courios as to know how you calculated it

ty
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post #5 of 12
PC power cooling 750w will be more than enough power! Even a FSP/gamextreme 700w will supply plenty of power.
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post #6 of 12
Quote:
run my rig of an FSP Epsilon 700W, and mine seems to draw more power than yours.
this is the power supply i have and its been great for about a year now and it works without any fluctuation on any rails, very good for the price imo
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post #7 of 12
Quote:
Originally Posted by OCZedd
Hey Choz, how do you know that 500W of power drawn is gonna be 42A? I am not saying your wrong, I am just courios as to know how you calculated it

ty
GPU power is all from the 12V rails.

Since Watt = Volt x Amperes, and we know Watt and Volt, we can easily calculate the Amperes. Outcome: 41.666666, rounded to 42A
    
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post #8 of 12
Top Seasonic M12
post #9 of 12
Looking nice. 700W, 56A.. Nearly same specs as the FSP Epsilon/OCZ GameXStream.

Now, personally I don't like modular, but that's a matter of preference.

My first pick is still the PC Power & Cooling, also because of the fact it has a single rail (which is beneficial with those DX10 monters on the horizon. The power draw of those cards exceed the specs of most (if not all) rails on multiple rail PSUs)
    
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N/A Corsair HX520 Coolermaster Cavalier N/A 
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E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
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250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
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post #10 of 12
Thread Starter 
well it is my sig rig but im planning for the future as well . . next winter im looking into K8l (pending testing results) and right now i also have 5 HDs i want to hook up (three storage and two raptors system) and would like to do an eventual upgrade to 4x raptors. thats a lot of HD's. . . i have 2xoptical bays (DVDRW that i use frequently for backups as well. . . .plus i like to be overpowered a lil. . .

>> Ive never heard of Tagan . . are they any good? . . i was looking at PCPower and cooliong and silverstone primarily . . and OZ but i dont think they have anything that high
 
ESXi Server
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HTPC
(13 items)
 
CPUMotherboardGraphicsRAM
i7-4790K Asus Sabertooth Mark 2 Radeon HD 6950 GSkill Sniper Series 
Hard DriveCoolingOSMonitor
Samsung XP941 Noctura NH-D14 8.1 Pro QNIX 27" @ 1440, AOC 27" @ 1080, Dell 24" @ 1080 
KeyboardPowerCaseMouse
Corsair K95 PC&P 750 NZXT H2 Logitech G500s 
CPUHard DriveHard DriveHard Drive
Phenom II x4 965 WE Red Seagate Intel SSD 
Hard DriveCoolingOSOS
WR Raptor  Silenx Fans x2 120mm Win 7 x2 Unraid 
OSCase
pfsense Rackmount 16 bay hot-swap 
CPUMotherboardGraphicsRAM
i3 2100t Gigabyte integrated 2x 8GB GSkill 
Hard DriveCoolingOSMonitor
OCZ SSD Stock Win7 - Plex Shell Sony XBR2 
PowerCase
Generic 350 watt Repurposed Vidabox 
  hide details  
Reply
 
ESXi Server
(10 items)
 
HTPC
(13 items)
 
CPUMotherboardGraphicsRAM
i7-4790K Asus Sabertooth Mark 2 Radeon HD 6950 GSkill Sniper Series 
Hard DriveCoolingOSMonitor
Samsung XP941 Noctura NH-D14 8.1 Pro QNIX 27" @ 1440, AOC 27" @ 1080, Dell 24" @ 1080 
KeyboardPowerCaseMouse
Corsair K95 PC&P 750 NZXT H2 Logitech G500s 
CPUHard DriveHard DriveHard Drive
Phenom II x4 965 WE Red Seagate Intel SSD 
Hard DriveCoolingOSOS
WR Raptor  Silenx Fans x2 120mm Win 7 x2 Unraid 
OSCase
pfsense Rackmount 16 bay hot-swap 
CPUMotherboardGraphicsRAM
i3 2100t Gigabyte integrated 2x 8GB GSkill 
Hard DriveCoolingOSMonitor
OCZ SSD Stock Win7 - Plex Shell Sony XBR2 
PowerCase
Generic 350 watt Repurposed Vidabox 
  hide details  
Reply
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