Sign in with
Sign up | Sign in
Your question

how much watts is enough

Last response: in Components
Share
November 7, 2006 1:52:06 AM

i have been planning on upgrading my psu. the one i'm using now is a cheap 600w, under full load i'm getting large voltage fluctuations so i'm thinking about getting more watts and a better brand. i'm running a lot of fans 6-120mm, 2-80mm, and 2-40mm fans also 2 hdd's, 7800gtxoc and a waterpump. there are 3 brands i've been looking at and just want to get some input on which would be the best buy for the brand-price and wattage. the ocz is looking pretty good right now or should i sacrafice the extra $50 for the other brands with 700w's or is 700w's enough.

ocz... http://www.newegg.com/Product/Product.asp?Item=N82E1681...

seasonic... http://www.newegg.com/Product/Product.asp?Item=N82E1681... or http://www.newegg.com/Product/Product.asp?Item=N82E1681...

silvestone... http://www.newegg.com/Product/Product.asp?Item=N82E1681...

More about : watts

November 7, 2006 2:16:59 AM

Just put your stuff in this link and calculate how much power you need yourself, you lazy b$*@t#!d! :p 

Power Supply Calculator

I doubt you will need 700W!
November 7, 2006 2:26:54 AM

thanks for the link i never new there was such a thing. but from the info i put in its calling for 880w's now i'm going to have a really long talk with my wallet and hear what it gots to say about it.
Related resources
a b ) Power supply
November 7, 2006 2:30:31 AM

You don't need a more powerful PSU. You need a better quality PSU.

The Seasonic S12 500 should be more than enough for you. If you plan on being an early adoptor of DX10 cards like the 8800GTX then get the S12 600 since you have ten fans in your case. Your case must be pretty loud.
November 7, 2006 2:34:54 AM

it was quiet until a added 2 high cfm 40mm fans. the psu you recommended is it 20a on a 12v rail. also i wanted to have a little extra power just in case. i'm still just on one vga.
November 7, 2006 2:45:02 AM

Quote:
If you plan on being an early adoptor of DX10


after what i paid for my 7800gtx just a little over a year ago its going to be with me for a while unless it breaks.
November 7, 2006 2:53:46 AM

Quote:
You don't need a more powerful PSU. You need a better quality PSU.


No, what he really needs is a better cooled case if he's using 10 freakin' fans!!! :lol: 
November 7, 2006 2:56:42 AM

ha ha you're funny. all the fans are not in the case, there on radiators.
November 7, 2006 3:13:21 AM

On radiator?! What are you talking about?
November 7, 2006 3:16:51 AM

[/img][/img]2 radiators one for the cpu and one for the gpu

a b ) Power supply
November 7, 2006 3:21:45 AM

Quote:
it was quiet until a added 2 high cfm 40mm fans. the psu you recommended is it 20a on a 12v rail. also i wanted to have a little extra power just in case. i'm still just on one vga.


The Seasonic S12 500 provide 33amps on the 12v rails, or 396w total.

November 7, 2006 3:26:07 AM

Quote:
You don't need a more powerful PSU. You need a better quality PSU.

The Seasonic S12 500 should be more than enough for you. If you plan on being an early adoptor of DX10 cards like the 8800GTX then get the S12 600 since you have ten fans in your case. Your case must be pretty loud.


What he said....

Quality beats quantity any day. Any of the purepower or other quality PSU's above 450 W will make you very happy.

Rude to ask for 800+ watts when not needed.

I ran a 3.2 p4, 1.5 DDR ram, 2 SATA HD, x1900xtx, 2 dvdrw, 1 floppy, sound card and extras on a 430 Thermaltake purepower 430 for 7 months. 5 case fans too!

The 12 v rail is important though, find a psu with at least 20 A on it, the new 8800 GTX will require the 2.2 version, which gives you the 2x 6 pin connectors for the vid card.
November 7, 2006 3:35:03 AM

even with 20a on the 12v rail. with so many other components pump fans etc, going for more watts on a good brand psu. would be the best bet. stock settings its fine but overclocked under load is where i see a voltage problem.
November 7, 2006 3:39:19 AM

Cartman, his computer is water-cooled. As to having 10 fans or so running on a 600w PSU...if you have more than one GPU and an overclocked CPU I'd recommend at least a 620w, but you might as well splurge and get that 170 buck 700 or 750w Thermaltake PSU. As it is, I'm running an Athlon X2 about 8 fans, and an X1900 on an Enermax Liberty and I'm pretty sure I'm using most of the juice I've got. This system cranks out a LOT of heat. What are the amps on your 12v rail? Do you have dual rails or just one? If you're planning on running SLI or Crossfire or quad core in the near future and don't want to end up buying yet another PSI I'd say go for a 700w+ PSU. I'd drop good money into a slightly higher wattage than necessary PSU everytime you go to buy one. It allows for future upgrades, ensures good power, and chances are that your system and PSU will last just a bit longer. You don't want to have to concern yourself with it, but at the same time you don't want to be powering a much larger PSU than you'll need.

Edit: I'd say 30amps, not 20 on the 12v. Especially with all those fans.
November 7, 2006 3:43:43 AM

how is enermax i didn't check that brand out. how many watts are you using with the 8 fans.
November 7, 2006 3:46:45 AM

Quote:
I'd say 30amps, not 20 on the 12v. Especially with all those fans


is there 30a on 12v rail available, who makes it.
November 7, 2006 3:55:04 AM

Quote:
What are the amps on your 12v rail?


it says it 18a but i'm not sure if i can trust it. its a cheap psu.
November 7, 2006 3:58:51 AM

this is an old case with new insides. the radi inside i didn't want to leave it sitting around so i used it. the psu i have now only has 2 12v rails.
November 7, 2006 4:05:05 AM

That power supply calculator is handy!!!

My power supply is fantastic, long connectors, lots of plugs, exceptionally quiet.

Thermaltake Purepower 680w and its pretty good price too. I like the design with the dual fans, it helps to pull hot air out of my case.
November 7, 2006 4:14:38 AM

so seasonic sounds like the best choice. the feeling is mutual about having to much power its better to have more, than to come up short. (measure twice cut once). i like the thought of a second pump also
November 7, 2006 4:22:50 AM

right now at stock 2.4 settings i'm getting 25c which is also room temp. and overclocked i'm still within safe operating temps. but it gets unstable after 3.72 with 1.625v when i monitored the voltage under load it was fluctuating up and down by about .0300v's which led me to consider the psu.
November 7, 2006 4:28:25 AM

every time the iterations start paging in orthos it fluxs down by about .0300, but never up by more than .0100
November 7, 2006 4:56:42 AM

yeah you might be right. i've been trying to squeeze every last mhz out of it, and was just not happy with 3.7. i really was looking to get 3.8, i get there but its just not stable. in a couple weeks i'm going to try a better psu. the psu i'm using now is from when pci-e and the 24pin boards just came out so there wasn't many choices at the time. well there were a few good brands but the prices were through the roof. if the new psu doesn't help well a least i'll know i got a good psu for later components. your advice was helpful and i will take everything you said in consideration thanks.
!