Sign in with
Sign up | Sign in
Your question

Another needs help choosing Power Supply

Last response: in Components
Share
June 6, 2011 11:27:01 AM

I would welcome some help folks:

I have just upgraded my home Desktop PC from it's 2006 delivery state of:Foxconn 945G7MA Motherboard. Intel P4, GeForce 7600GT, CDDVDRW, Floppy drive, 80GB Hard Drive, simple speakers, normal keyboard and mouse - all run from a Proline 350W with 16A on Single +12V Rail. All worked fine.

I now have:
MSI GT31TM - P35 Motherboard.
Core2 Q8200
ATI Sapphire HD 3840 (requiring 26V on the +12V Rail I am told). It also has a 6 pin input - served now by adapter.
Additional 500GB WD 7200 Hard Drive.
Same other bits.

The HD 3870 starts well for a few seconds under test then sulks to a fps of half what my 7600GT was giving on MS FSX.

I understand clearly that I need a better power supply. But I am totally bemused by the various sources of advice I have found or have been given. Many contradict each other in respect of the importance of Wattage, one or more rails, actual Amperage per rail, etc, etc,. Also, finding specs that give all the info I am supposed to check is proving just too much for my overloaded brain!

I would be very grateful if I could be directed at specific PSUs that would be suitable. I have limited funds - don't we all - and other than some Flight Simulator games, use the PC only for normal domestic use. I live in South Africa but most makes are available to us here.

If you have read this far-Thanks

IPW






More about : choosing power supply

a b ) Power supply
June 6, 2011 11:34:58 AM

If you are looking for a long term solution, like covering future upgrades get a big one from Antec, Seasonic, Corsair and you wont go wrong. Other than that for this one I would think a good 400W-450W from any of these brands would solve the problem.
a b ) Power supply
June 6, 2011 11:42:10 AM

Whazzup fellow countryman!

This is a link to a very useful PSU calculator:

http://www.antec.outervision.com/

It's quite important that you verify whether your GPU is is the standard 3870 or the 3870X2. The power requirements are vastly different.

Either way, a solid 500-550W should be all that's required. Stick with known quality brands such as Antec, Corsair, CoolerMaster, Gigabyte, etc. Do not buy any no-name cheapies.
Related resources
June 6, 2011 11:45:07 AM

Thanks - what is a big one??

A local source has just sent me details on this 600W Isonic:

+3.3v +5v +12v1 +12v2
16A 17A 18A 19A

Reasonable price but will it do??
a b ) Power supply
June 6, 2011 11:52:41 AM

Isonic? Never heard of it. So i would not say go for it. By big one's, i mean higher wattage one's. Like 700W and above.
a b ) Power supply
June 6, 2011 11:53:18 AM

Herr_Koos said:
Whazzup fellow countryman!

You mean me or IPW? :) 
June 6, 2011 11:55:31 AM

I am in South Africa.

I AM A Highland SCOT :-)
a b ) Power supply
June 6, 2011 11:57:01 AM

Then i think he meant you! :) 

I am not from South Africa! But i am a big fan of Jacques Kallis!
June 6, 2011 12:17:42 PM

It is a single HD 3870.

I have some other ISONIC bits and they seem OK.

But what about the 12v Rails - will that do?
a b ) Power supply
June 6, 2011 12:22:37 PM

It is ok. But the question is will it be able to deliver the rated capacity for long? That is why PSU with reputed brand names is key. They at least provide what they write.
June 6, 2011 2:09:00 PM

Thanks, understand. Isonic is a new brand that is being marketed here in a huge range of PC and general electronic devices.

I did the Antec power requirement test and it came up at 395W.
I suppose even a not top grade 600W PSU will crack that easily?

I don't anticipate upgrading anything more for years....

a b ) Power supply
June 6, 2011 2:56:20 PM

IPW said:
I am in South Africa.

I AM A Highland SCOT :-)



If you stay within these here borders, you become an honorary Saffer, finish and klaar. :-)
a b ) Power supply
June 6, 2011 2:58:53 PM

IPW said:
Thanks, understand. Isonic is a new brand that is being marketed here in a huge range of PC and general electronic devices.

I did the Antec power requirement test and it came up at 395W.
I suppose even a not top grade 600W PSU will crack that easily?

I don't anticipate upgrading anything more for years....


Never heard of them before; so I'm a bit sceptical. PSU tests have proven that poor quality units a) deliver a very dirty and unstable supply, which could damage your other components, and b) fail at much lower load than what they are supposedly rated for, sometimes catastrophically.
a b ) Power supply
June 6, 2011 3:00:01 PM

hell_storm2004 said:

I am not from South Africa! But i am a big fan of Jacques Kallis!


Excellent taste, my good man. Whatta playa!
a b ) Power supply
June 6, 2011 3:06:17 PM

He is probably the best all rounder that i would see in my lifetime!
a b ) Power supply
June 6, 2011 3:07:48 PM

hell_storm2004 said:
He is probably the best all rounder that i would see in my lifetime!


Can't fault that logic. Where are you from, by the way?
a b ) Power supply
June 6, 2011 3:10:25 PM

I am from India. Where cricket is a religion! But it certainly is not mine. But i do love some quality cricket every once in a while!

I am more into soccer! :) 
June 6, 2011 3:26:31 PM

I too was a cricketer a long time ago - Associate ICC standard :-)

Last 'proper' match against Sri Lanka in 1981.

Was coached by a guy called Rohan Kanhai - perhaps you should 'Google' him... :-)

a b ) Power supply
June 6, 2011 3:30:44 PM

Not needed. I am pretty good with Cricket history! :) 

He finished his career just in the midst of West Indies' domination of world cricket! My dad watched him play in India! :) 
June 6, 2011 3:44:45 PM

Absolutely correct.

As a 13 year old, in a friendly match in Aberdeenshire (before he went to Warwickshire) we share an opening partnership of about 130 - I scored 7!
a b ) Power supply
June 7, 2011 7:45:44 AM

Awesome story! Honoured to make your acquaintance.
June 7, 2011 10:37:36 AM

Thanks - but well beyond my budget :-(
a b ) Power supply
June 7, 2011 10:41:12 AM

What is your budget?
a b ) Power supply
June 7, 2011 10:44:41 AM

I see that the link from Herr_Koos is a whole lot cheaper. Around 400 Rands! :) 

That should be fine right?
a b ) Power supply
June 7, 2011 10:46:34 AM

Take 2 have a very nice selection of components. I was actually very surprised, since most other online retailers like Kalahari are INCREDIBLY expensive when it comes to electronics.

They stock Antec, CoolerMaster and Thermaltake as well.
a b ) Power supply
June 7, 2011 10:48:40 AM

In general are the prices in South Africa expensive or relatively ok as compared to the US?

For us in India, products normally do cost a whole lot more. A $200 GPU would cost something around $250 here!
a b ) Power supply
June 7, 2011 10:51:11 AM

Hard to say for sure. If you compare R to $, SA is much more expensive in most cases, probably by 20-30%. I assume this is because of import tax, local profit margins, etc etc.
June 8, 2011 5:35:58 PM

hi there
alot of costly psu out there but the best price performance ratio would be FSP.. they sell at a reasonable price but same quality and performance to those
hyped psu like corsair and antec.
just get the FSP Everest 600w, true 600w power, modular, and it can handle your system very well.

this is the review, see how it beat a well known silverstone brand in performance price ratio.
http://vr-zone.com/articles/practical-power-silverstone...


June 9, 2011 10:44:32 AM

Thank you.

Have bought the Corsair 600CX.

Meets just about everone's advice.

Thanks to all.
a b ) Power supply
June 9, 2011 10:48:24 AM

Awesome, glad to hear it.
!