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How big of a power supply would I need?

Forum CPU & Components : Power Supplies, PC Cases & Case Mods - How big of a power supply would I need?

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stonezippy   07-27-2008 at 10:08:01 PM

This is what i'm using right now

http://www.newegg.com/Product/Prod [...] 6817371011

I just put a 9450 intel quad core in, 2x2gb ocz ram, visiontek 4870, also have 1 dvd-burner, 250gb hd, 74gb raptor in my system.

What would I need to get upto 4x2gb ram, another 4870 xfired?

850watt or higher, I believe 650w is too low for what i want to do eventually.

Since the 4870s seems to max out at 285w by itself under load.

Thanks!

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cmichael258   07-27-2008 at 10:38:00 PM
- 0 +

[url]http://educations.newegg.com/tool/psucalc/index.html

Message quoted 1 times
Reply to cmichael258
The_Blood_Raven   07-27-2008 at 11:38:41 PM
- 0 +

A good 750w PSU will be plenty, I recommend the PC Power and Cooling 750w, it is the absolute BEST 750w PSU when it comes to stability and quality.

Message quoted 1 times
Reply to The_Blood_Raven
stonezippy   07-28-2008 at 03:06:43 AM
- 0 +

cmichael258 wrote :

[url]http://educations.newegg.com/tool/psucalc/index.html



The_Blood_Raven wrote :

A good 750w PSU will be plenty, I recommend the PC Power and Cooling 750w, it is the absolute BEST 750w PSU when it comes to stability and quality.



jpbg wrote :

http://www.newegg.com/Product/Prod [...] 6817139006 same as the pc power and cooling but cheaper^



TY! I did not know that psu calc existed. :D

Reply to stonezippy
invisik   07-28-2008 at 04:35:40 AM
- 0 +

do u plan to upgrade ur system in the future?

Message quoted 1 times
------------------------------ intel core 2 quad q6600 @3.2ghz msi p6n diamond (X-FI Extreme sound) 6gig of OCZ+CoRSAIR oc 900mhz Nvidia gtx 260 sli @ 730/1465/1250
Lite-On Blue-ray Western Digital 7200rpm 500gb Antec 500 Earthwatt Window vista 64-bit
Reply to invisik
stonezippy   07-28-2008 at 05:37:21 AM
- 0 +

invisik wrote :

do u plan to upgrade ur system in the future?


It just depends. If I added another 4870 and 4 more gbs of ram, i'd be maxing out my system. I want this rig to last around 2.5-3 years.

It depends on what the prices do of those 2 items.

Reply to stonezippy
IH8U   07-28-2008 at 05:45:19 AM
- 0 +

I've got the Zalman 750 (yes a 750 should be plenty)(I just hate the blue LED's), and I'm using a 9850 (high wattage) it runs my system fine. Just get a good quality PSU, and it should last you through a few builds.


P.S. Modular cabling is a plus

Reply to IH8U
ksweitz   08-02-2008 at 03:06:03 PM
- 0 +

[quotemsg=1843761,7,55670]Another, slightly different approach to PSU selection,
is to look at their graphs of efficiency vs. load.

Then, pick a point on that graph where efficiency
is highest: in that way, you'll minimize power
consumption in the long run.

Whenever in doubt, a good rule of thumb is
to utilize 50% of the rated capacity of any given PSU.

...

Interesting... when looking at the Corsair efficiency for a 650 W supply:
<http://www.corsairmicro.com/_images/charts/tx650w_efficiency.jpg>

The 230 Vac curve is 2% higher than the 115 Vac... Perhaps I should consider running a 230 Vac line to my server to get the better efficiency! Has anyone else out there considered this?

Reply to ksweitz
invisik   08-02-2008 at 08:14:05 PM
- 0 +

okay so i would suggest a good 600watt. im running a q6600 oc @ 3.0ghz and 2 gtx 260 in sli oc running on a 500w! just to be safe i would recommend 600w if ur gonna oc alot or if u add any extra hardrive, fans etc..
anything above 700w is just overkill.

------------------------------ intel core 2 quad q6600 @3.2ghz msi p6n diamond (X-FI Extreme sound) 6gig of OCZ+CoRSAIR oc 900mhz Nvidia gtx 260 sli @ 730/1465/1250
Lite-On Blue-ray Western Digital 7200rpm 500gb Antec 500 Earthwatt Window vista 64-bit
Reply to invisik
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