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How important is power unit? - Page 2

post #11 of 39
Yeah, a generic psu will def. kill your OC.
     
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post #12 of 39
You seriously need to get ASUS P5WD2 Premium or ASUS P5WD2-E Premium
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post #13 of 39
Your power supply needs to be on the level of the performance of the rig you intend on using. You dont put 86 octane fuel into a race car.

Also make sure that you have clean voltage. I have heard of issues where people have motors (fridge, blender, etc) where it can add noise to the voltage as well.
post #14 of 39
Quote:
Originally Posted by Dom.Gilberto
but ive seen people oc on same motherboard to insane clocks... so obviously its possible...
I guess that depends on what you consider insane. The most I can remember someone getting on a SLI board was, I think, 260 FSB.

That's good, don't get me wrong, but it's not the 285FSB I am running on my P5WD2-Premium (and I am only stopped there due to heat). Nor the 300FSB+ pauldovi is running on his E-Premium.

Do you need a good PSU?

Yes.

Will a bad PSU hold you back?

Yes.


But the best PSU in the world will not help if the CPU and/or the board isn't up to the job.


Not that I am recomending throwing away your system and starting from scratch. Get a good, high quality PSU, it needs to deliver solid power on the rails and should be at least 450-500w(depending on how many HDs, the type of video card, fans, lights, ect you run in your system). Upgrade your PSU, see how far you can get, if you decided to upgrade your board later, you can still use that solid PSU.

But just buying a PSU that puts out 500w isn't enough, have to look at the specs on HOW it delivers that 500w.

Xion PowerReal XON-600F14T-201

That's the PSU I have, notice the output specs where it rates the amps on each rail.

Quote:
Output: +3.3V@35A, +5V@53A, +12V1@22A, +12V2@22A, -5V@0.5A, -12V@0.8A, +5VSB@2.5A

That's a $100 PSU ($90 after rebate).

Now look at this....

ASPIRE ATX-CW500WP4

That's a $40 PSU.....and look at it's ouput specs....

Quote:
+3.3V@17A, +5V@25A, +12V1@16A, +12V2@18A, -5V@0.5A, -12V@0.8A, +5VSB@3.0A

See the difference? Almost similar wattage rating, but a big difference in amprege delivered. The 500w version of my PSU has slightly lower amprege rating on the 12v lines than the 600w, 18 and 20 respectivly.......but still better than the $40 one. The minimum you really want is 18 IMHO, but the more you get, the more room you have to grow.
post #15 of 39
Thread Starter 
wow thanks thumper. Thats helped me alot. To be fair i do know a fair alot about computers but nothing to do with psu`s lol. Obviously i know i have to have a good one but ive never got around to doing it. First off i was thinking of buying either the seasonic 600 watt, which can be found herehttp://www.overclockers.co.uk/acatalog/Seasonic.html, or secondly this one, the Enermax Liberty 620 watt, http://www.overclockers.co.uk/acatal...ermax_111.html. I can give you all the specs of my generic psu atm... which is here:

Magna-500watt
+3.3v-28A +5V-40A +12v-17A -12v-0.8A -5V-0.5A

If there is something ive missed in this description that you may like to know about my psu just let me know. Another thing is, on my old non nforce4 with same cpu chip i clocked it stable at 3.8?...Now with this darn mobo i cant put it stable anywhere....and like ive said i have changed the mobo version from 0802- 0905 however i am not sure whether this 0905 is actuall that good or if it is this version playing up....either way i would like to get to the bottom of this on top of i am upgrading PSU anyway...just want to know about this now because im afraid of buying new psu and not sorting why i cannot oc... Thanks
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post #16 of 39
Thread Starter 
Comparing mine to your psu now... i wouldnt have thought mine would no way be restricting me this badly...would you? I think it looks like not so much my psu but something else... although it is playing the biggest part im sure there is something else im doing wrong...what do you think?
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post #17 of 39
Man, I had this post done and the server died LOL



The trouble here is that we've already identified the weak spot of your OC, and it's your motherboard. So while I am sure you would be better served with a better PSU, I can't offer any hope your OC will change. You are only as good as your worst part.

Put another way, I have my 920 running at 3.93 stable on my system. if I were to take your board and keep all my other parts the same, I doubt I could OC as high as I am now. With my better PSU and everything.


As I stated before, rarely do we get everything we want in life, and often there are tough chocies to make. If SLI is that important to you, then you will have to accept lower overclocks. If overclocking is more important, you will have to give up SLI.

My personal opinion, for what it's worth, is that unless you are using your system for just hardcore gaming, and have a 24" plasma display running your games at 100% settings with 1900x1600 resolution.....SLI is just something to brag about having.
post #18 of 39
Thread Starter 
yeah that is so true about SLI, but why is it that other people can oc other than me... and lets not just say with all do respect "well you cant have averything in life.." because to be quite frank your right but in this scenario...no thats total crap. How is it people can oc with there rigs on same damn motherboard and i cant its just outrageous.... there must be settings im doing wrong or havnt got the hang of the divider or do i have to put a divider on or can i just put my own clock speeds in manually instead... i cant get my head round it and i would love to speak to somone who had this motherboard and got a way around ocing it! thanks for your help so far im still interested in your tips there really helpful... thanks

EDIT- what du think about me getting same motherboard as you then... and not getting new psu instead...with the specs of my wattage i would say its fine to oc...:S
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post #19 of 39
It's importiant to a certain extent... I mean you want a good power supply but you don't need a PCP&C 1KW just to power your grandmas celeron. Just make sure it's a brand name and has the ammount of amps on the 12V line that you will need.
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post #20 of 39
Thread Starter 
thanks fishie. So do you think my specs with my power supply is ok then? Because i have checked up about it and thie psu shouldnt be holding me back that much...only when i hit high clocks but i mean i cant even pull of 3.2 and even if i did thats crud and i need higher... specs are posted just above this one with the amps and voltages...
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