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Power supply question

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Will 480W be enough?

Total: 26 votes (1 blank vote)

  • Yes
  • 60 %
  • No
  • 24 %
  • Close enough ;)
  • 16 %
January 23, 2006 11:49:20 AM

Hi, im planning to put together a new pc i was wondering if this (Thermaltake Purepower 480W) power suply would be enough to work with these parts that I will be buying soon, here are the components:

- Asus P5WD2-E Premium motherboard
-Intel Pentium 4 640 Preocessor (its a 3.2)
-ATI A-I-W Radeon x1900
-1 or 2 Gigs of DDR2 ram (im stil thinkink if i should get 2 gigs or 1 will be enough)
- 2 hard drives
- 2 optical drives ( a DVD drive and a CD-RW drive)
- 1 floppy rdive
- a Thermaltake case with 7*80mm fans, and 2*60mm fans (in a HD cooling bay)

Will the 480W power supply be enough to power this system? it has a absolute peak output of 550W , but just looking at 480W will it be enough?

Thank You for reading my post, and thx for replies in advance.

More about : power supply question

January 24, 2006 11:11:49 AM

thx, Iv checked that site before, some information is quite outdated thou
but thx
Related resources
March 18, 2006 9:40:39 PM

i did change the 1800 series to 1900 (atleast thats what i want to buy)
will the power supply(480W) be enought for this system?
thank You
March 18, 2006 10:11:05 PM

o man i wouldnt risk it

get an Antec 550w TruePower 2.0 (90 bucks) much better and that will be enough
March 18, 2006 10:34:39 PM

Yes, 480W will be enough but with seven small fans, I hope you don't mind a noisy case. lol
March 18, 2006 10:38:54 PM

what Tt case u gettin?
March 18, 2006 10:57:26 PM

I love the Gigabyte 3D Aurora! Choice of left panel mesh screen or window and some bling with quiet cooling with three 120mm blue LED fans. It also has a feature where you can project your name or logo instead of Gigabyte's. Excellent reviews, ie. xbitlabs, hothardware, tweaktown, etc. And, it's geared for water-cooling if you want to go that route now or later. This baby is going to house my build in Q3.
March 19, 2006 1:34:57 AM

I have the thermaltake xaser III series blue i had it for a while, and i like it so far;)

ill be replacing the inerds;) a new mobo, ram, cpu, vid card, the 2 hd, and 2 optical drives, control bay/fans, and the antec hsf cooling bay, PSU(if itll be enough) will be the same, i thought the PSU is good;) its nice and cold all the time, so i guess that litle bust from new parts will not take much from it;) hopefully


btw does anyone know maby what Watage would this system use(listed above?) just aout curiosity ;) 

thx, much oblidged:) 
March 19, 2006 1:39:22 AM

i think each fan uses 1 or 2 W and they are not so laud, the psu (2 fans inside) are loudest, but they have a manual speed controler, as the otehr 7 do ;)  (in the bay, i think it is a canoo design;)
March 19, 2006 4:57:04 PM

thx, i used that site to calculate it (yesterday) and it all came out to be 377W (i used a radeon x19xtx instead of the 1900aiw, which was not available there, and just to be safe;)) so i think (if the calculations are corrct, and precise) that that almost 103W of overhead with my 480W psu is good:)  and I believe that i can use it for my future rig :)  cool:) 

just im a bit woried about the (i found this on a retailers site) 30A on a 12v rail requirement, i think i have nly 18A, will that be very bad? i checked some new psu and they has simmilar amperage, does it mean its 18A on only one rail, and the "combined" amperage is more? hm...does a rail mean that one string of 12v molex cables? (just asking to be shoor) ;) 

Thank You all for the assistance once again. :) 
March 19, 2006 7:01:01 PM

Manufacturers frequently overstate the power requirements of their cards just in case someone has an inordinate number of power consuming components in their system. However, it's a long way from 30A to 18A.

With multiple +12V rail psu's take the total wattage shown for the combined +12V rails and divide by 12 to get the total amps for the +12V rail. You can't simply total the rails. For example, a psu with three +12V rails and 18A on each doesn't necessarily give you 54A. If the combined +12V wattage is say 504W, dividing by 12 shows you getting 42A from the +12V rails. Still an awful lot! This is a real world example using the Antec NeoHE 550.

The X1900XTX is the most power hungry card around so even though your psu might have enough watts it may not have enough amps for it.
March 19, 2006 7:59:40 PM

thx for the info so if i did calculate it right i have 40A (480W/12v)

and in redards to 1900xtx im not planning to buy it i just did input it just to check the Watage (supposable max;) power usage) im planning to get a ATI 1900 A-I-W (with the above other parts) so i think (hope) it will be enough,

btw in regards to that 18A information, how do companies state the Amperage? by rails or total Amperage on the lets say 12v?

btw just out of curiosity what might happen if the psu is 2 weak for components that need more power, would it hm...explode, fry the parts or just not work, just curious ;) ......this will be my first pc that i would put together from scratch, (i did upgrade my ram, vid card, case, psu thou, and rep[laced 3 hd's, and 1 cdrw drive...so hopefully it wont be sho problematic to hm..."start from scratch";)
March 19, 2006 8:58:00 PM

Quote:
btw just out of curiosity what might happen if the psu is 2 weak for components that need more power, would it hm...explode, fry the parts or just not work, just curious ;) ......this will be my first pc that i would put together from scratch, (i did upgrade my ram, vid card, case, psu thou, and rep[laced 3 hd's, and 1 cdrw drive...so hopefully it wont be sho problematic to hm..."start from scratch";)


I would say... instability problems (shutdowns, freezes, BSOD, ect). leading to PSU failing, which could take out something on the motherboard, if it doesn't regulate the voltage properly. And the least thing expected.. power spikes or surges can really cause some unexepected headaches.
March 19, 2006 9:24:09 PM

lol...not so nice:(  ;) 
its good atleast that i have the whole pc connected to a "cyber power 1000AVR backup power with automatic voltage regulator" lol, so the spikes are reduced to almost none, or atleast they say so;)....but honestly those back up bateries are good:)  lol during those blackouts during summers ;) 
thx for the info.....so i guess if the calculations above are correct the psu would be strong enough Watage, and Amperage wise;) :) ....hopefully
March 19, 2006 9:24:32 PM

Sorry, you did it wrong. Every psu has a power label. Yours show just one +12V rail so there is nothing to calulate. http://www.newegg.com/Product/ShowImage.asp?image=17-15...
It provides 18 amperes. This is an example of what I was talking about with respect to multiple +12V rails. http://www.thinkcomputers.org/reviews/antec_Neo_HE/tn_a...(8).JPG
It shows three +12V rails. Some have four.

If you don't have enough power nothing will fry or explode. Some cards will give an error message saying it's not getting enough power. Some games might freeze on you or throw you back to your desktop, BSOD, rebooting. If you do not have enough power for your card/system you will find out pretty quickly without anything dire happening.
March 20, 2006 12:05:46 AM

ok thx for the info, aprecieate it, my psu ia a W0011 model ( a bit older) but ill have to check it lol 2 bad its on the other side(the sticker) so ill have to take the cpu out ....:(  ...somehow;)...or maby ill just slide a mirror there;) ...somehow thx again
March 20, 2006 12:22:28 AM

i found it here is the psu i have:

http://www.thermaltake.com/purepower/W001011.htm

will it have enough power? it is only 18A on the 12V :( 
it has the same specs as teh one You posted (thermaltake)

and the
http://www.thinkcomputers.org/reviews/antec_Neo_HE/tn_a...(8).JPG
http://www.thinkcomputers.org/beta/home.php?x=reviews&i... <----thats the one i have


it is weird or not, but there are atleast 2 long main 12 "wires" going from teh psu, and only 1 is listed on my sticker...nevermind maby i got rails confused with the separate cables:( 
March 20, 2006 5:14:07 AM

you should be fine, I have a W0009R / TT420-AD (the cheaper one) powering my son's PC, an Athlon64 3400 / vnf3-250 / 1Gb (2 x 512) / BFG6800GT / 4 IDE HDDs / SCSI DVD & CD / 4 80mm fans, and I used it in a dual PIII server for a few months and no issues... it is just over a year old.
March 20, 2006 6:19:06 AM

Quote:
The Thermaltake Purepower 480W is an excellent PSU.
Yes, 480W is enough.

http://www.newegg.com/Product/Product.asp?Item=N82E1681...
OMGWTFBBQ ONLY 480WATTS? YOU NEED 1000 THATS JUST NOT ENOUGH111one111!
Just kidding. 480 Thermaltake is plenty.
Also, why are you getting the Intel 640? Get a 641, it will run cooler and overclock MUCH better.
March 20, 2006 10:03:25 AM

40A 5V, and 18A 12 volt, that indicates an older design of PSU, for P3's and Athlons (Not AMD64's), where the CPU used to draw from the 5V rail.

P4's and AMD64's draw from 12V, so need a higher rated 12v rail. It wouldnt surprise me if your system could overload the 12v line if its only 18 amps.

Of course when AGP cards ran off the motherboard, they would draw power from the 5V rail, but all the big powerfull cards now use an extra power connector, and draw heavily from 12V rails.

Many of the watt calculators seem to be made by companies who sell large PSU's, even quite high end computers often sit well below 300w total power. However P4+Power Hungry GPU's could draw a large percentage of the total power, and 18A@12V only gives you 216W to play with, and I would suggest that is insuffficient.

I would strongly consider a more balanced designed powersupply, which will be able to supply your computers demands for 12V power.

That said, just throwing in a 680W PSU is not always the best plan, all PSU's are only efficient to a point, most PSU's seem to be best around 70% load. Lightly loaded, you may find the big PSU will draw more power from the mains supply than you actually need to run the computer, and all the 'extra' power will be converted to heat. If your computers load is around the 350W mark, then a properly designed 480W PSU with multiple 12v rails, or a single high current rail, will probably be the best choice.
March 20, 2006 1:34:14 PM

Quote:
If you don't have enough power nothing will fry or explode. Some cards will give an error message saying it's not getting enough power. Some games might freeze on you or throw you back to your desktop, BSOD, rebooting. If you do not have enough power for your card/system you will find out pretty quickly without anything dire happening.


Thats not entirely true.

I have witness a PSU under allot stress. To give you an example, I remember the day where we only had 250W PSU.

The system had 4 SCSI 10K-RPM drives, SCSI Tape Backup, 1 IDE CDROM, *Can't remember how much ram, but all 4 banks were used, and it was a dual slot PII 450 system, nic card, ect.. full load system.

Now.. the system didn't power up at times. The only impression I can give you to mimmic this is.. when it power button was press, we got.. "I think I can... I think I can.. I thin... x.X"

And I do remember touching the top of the case where the PSU was. This is on the outside of the case... it was HOT. You prolly could fry an egg on it. Something will give and break when under stress.

So it is always best to consider how much power your system is going to need, especially when todays systems are under full load.
March 20, 2006 4:24:21 PM

Of course it is always best to calculate what your system's power requirements are and build some overhead. When a psu is running at 100% it will get HOT. When you push it far enough over 100% it will shut down. This is what Over Voltage Protection does. :wink:

Corsair probably knows a thing or two about highend gaming systems so this is a good article for those recommending 600W - 700W psu's. :p  They build a system with two of everything, including 7800GTX, overclock it and power it all with a 480W psu...that's not even SLI-certified. :lol: 
http://sysbuild.corsairmemory.com/report.aspx?id=2.
March 20, 2006 5:00:23 PM

Heh.. that is why I said... that is not entirely true.

Hence, back in the day... 250W PSU. And besides.. it wouldn't start up because of the over voltage protection it had.

I understand about the Over Voltage Protection these days (should have got better, I don't see a amp fuse in mine). I was just giving an example that you can fry something.

But... in my opinion, sometimes you really can't trust some features. The quality of the products these days are questionable.

Though, I see you have a valid point on not frying things, but I still wonder if a PSU will over volt things if it is under too much stress, and harm the MB components.. <capacitors, coils, etc>

It really doesn't take much time to do that.
March 20, 2006 8:29:15 PM

I totally agree with you that the quality of products these days are questionable. Everybody and his brother makes psu's nowadays because the margins are so high. Some brands even try to squeeze a few more $ out of a model by skimping on quality. Folks really need to do their due diligence on components, particulary psu's.
March 20, 2006 8:31:59 PM

thx to all...now im really confused;) lol
i checked and it stated on the psu's site, and box(lol i still have it;)) that the peak output is 550W so i think think that is quite good considering that the psu is a 480W psu, and i think its 65% efficient...to be honest i never ever had noticed that the psu was hot, even after hm...playing some games for hours(2, 3...lol that was my max once;)) the psu itselfe, 9i touched the back of it) was rather ...cold, even the air coming out of it was cool, buth just for comparisment the 2 fans below it (cpu exhaust back fans) were warm (i would say even hot)

i tried to calculate the overall max power usage as i think stated somewhere above, and Watage wise i think ill be safe...hopefully, just for now im begining to worry about the amperage :(  , ati themselves state that a 450W psu is needed for a fully loaded system(mine is 480W so i think im ok there);)....and thanks the majority of Your suggestions...i think it should be ok;)...hopefully;)....jusst now im woried about the Amperage, i think i have 3 separate 12v "cables" going out of the psu, dont know if that helps in any way in the calculations...(but if it states 18A ) what can i do :( 

btw to the replay regarding the 640 vs 641 I was actualy thinking of geting the 641...just so far i have not done so much research into it...yet
March 20, 2006 8:46:32 PM

Quote:
thx to all...now im really confused;) lol
i checked and it stated on the psu's site, and box(lol i still have it;)) that the peak output is 550W so i think think that is quite good considering that the psu is a 480W psu, and i think its 65% efficient...to be honest i never ever had noticed that the psu was hot, even after hm...playing some games for hours(2, 3...lol that was my max once;)) the psu itselfe, 9i touched the back of it) was rather ...cold, even the air coming out of it was cool, buth just for comparisment the 2 fans below it (cpu exhaust back fans) were warm (i would say even hot)

i tried to calculate the overall max power usage as i think stated somewhere above, and Watage wise i think ill be safe...hopefully, just for now im begining to worry about the amperage :(  , ati themselves state that a 450W psu is needed for a fully loaded system(mine is 480W so i think im ok there);)....and thanks the majority of Your suggestions...i think it should be ok;)...hopefully;)....jusst now im woried about the Amperage, i think i have 3 separate 12v "cables" going out of the psu, dont know if that helps in any way in the calculations...(but if it states 18A ) what can i do :( 

btw to the replay regarding the 640 vs 641 I was actualy thinking of geting the 641...just so far i have not done so much research into it...yet

The 641 is in every way superior to the 640, get that.
March 20, 2006 9:06:44 PM

that was what i thought of doing after i "discovered it" i heard it uses less power, and is cooler, and has the same specs, and other "functions" as the 640 im still not shoor if it has the stepping technology, i think that one is quite useful, as i said i have to "research " it a bit more...i just found out about it hm...2 days ago...and i was going for a 640 because the price, and performance, and overal good reviews on it, so far i think the dual cores are a bit too expensive for me at the moment (considering that ill be building a new comp almost from scratch) and i think having a faster single core with HT is a bit beter than a slower dual core (2.8 or 2.6 pricewise) ...and i do not do much of multitasking....relatively not much.
March 20, 2006 9:39:34 PM

BTW when you get the 641, you are going to overclock and send me your results -.-
March 20, 2006 11:58:40 PM

I saw a 631 on a TT Big Typhoon for cooling doing 4.9 stable :o 
March 21, 2006 4:41:01 PM

realy???? 8O wow more thatn a 55% overclock lol thats just crazy lol , and to think i would oc a 3.2 maby max 30% lol;), so i guess i will seriously consider geting the 641 instead the 640 :) , i heard good things about it from others onthis forum, and im begining to get convinced, althou more people do say that a dual core is beter(i know lol) but i m geting a bew system and if it would be just a cpu then i might get a dualcore;)....a bit limited by $$...and the anoying fact is that i have to buy windows xp ....darn it ( i have a oem that came with my sony vaio...it used to be a sony vaio lol now its like frankenstinvaio lol ) and to be honest i do not want to waste that $200 on a new os knowing vista is comming out this year(i think) , and on the other hnd i dont really want to wait till the end of the year to get parts, just to get it with vista os...decisions...decisions...decisions :(  lol.

..btw will al software be able to run on vista that is will it all be compatible like older software with xp?
a c 158 ) Power supply
March 22, 2006 12:08:49 PM

Got a link for that or screenshots? Boot to BIOS or windows? Any benchies?
March 25, 2006 3:09:19 PM

nice :) ....lol i c this went off topic by a bit lol lol
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