Overclock.net › Forums › Components › Power Supplies › Need some advice- Seasonic G Series?
New Posts  All Forums:Forum Nav:

Need some advice- Seasonic G Series?

post #1 of 4
Thread Starter 
Hi, I'm totally new to power supplies and I could do with some advice. I'm purchasing a Coolermaster CM690 ii Black and white case and I will also purchase a Gigabyte Z77x UD5h motherboard, a Core i53570k or Core i53470 and a GTX 670 graphic card. For now I will not go SLI but would like that expansion option in the future, I may also overclock at some point if i purchase the Core i53570k.


I have looked at the SeasonicG Series 550W, semi mod, Gold psu and it has had an excellent review from Johny guru.com, I can purchase it for £82 from Overclockers, UK.
Also I have looked at many other psu's. Is the Seasonic G Series 550W suitable and capable of providing all the power requirements for this system if in the future I use two GTX 670 in SLI mode? I ask this question because I read conflicting advice from different sources and opinion. Some say you need over 650W at least and others say you don't need as much as long as the psu is a quality piece.

Is it suitable? If not what would you advise me? My limit is £100 but I would like to see if I can purchase an excellent psu for less than £90. Modular, semi modular with the right amount of connections for a future SLI set-up. Preferably Gold efficiency. My head is spinning, I am a newb. That is why I am here. Could someone spare me a few minutes. If you were purchasing from the Uk today and had a budget of £80, maximum at a push £100 what would you choose and why?

Thanks in advance.
post #2 of 4

It's plenty:

 

http://www.guru3d.com/articles_pages/geforce_gtx_670_2_and_3way_sli_review,4.html

 

With two GTX 670s under full load in their system, their PSU pulled 433W from the wall outlet.  Their CPU was idling, so I'll add 150W for a 3570K overclocked to 5 GHz (I can prove it).  This would then make the PSU pulling 583W from the wall outlet.  This means that if the PSU is 85% efficient while pulling 583W from the wall outlet, then the system would be pulling about 495W from the PSU.  This is an unrealistically high power draw because I'm saying the 670s and the 3570K are completely maxed out simultaneously.  Your actual gaming power draw will be closer to about 400-425W.

 

So, the 550W G Series is the perfect 'size'.  It's in the "sweet spot" in terms of maximizing your average efficiency.

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... 
  hide details  
Reply
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... 
  hide details  
Reply
post #3 of 4
Thread Starter 
Thank-you Two Cables, from all my reading and previous estimation of power needed I felt that a quality Psu rated at 550W should be enough but then doubt crept in when I read opinions that stated 650W+ were crucial. I'm very inexperienced and there is a lot of information out there and often it can be conflicting.
Thanks for your advice.
post #4 of 4

You're welcome!

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... 
  hide details  
Reply
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... 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Power Supplies
Overclock.net › Forums › Components › Power Supplies › Need some advice- Seasonic G Series?