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Which power supply? Need quick reply thanks

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June 27, 2010 9:28:47 AM

Hi guys, I've built PC's before but never paid any attention to the power supply because I've never built one with high consumption components before.
I need to know which wattage to choose for my power supply.

I've already chosen which one: OCZ ModXStream Pro
http://www.overclockers.co.uk/showproduct.php?prodid=CA... - 500w
http://www.overclockers.co.uk/showproduct.php?prodid=CA... - 600w
http://www.overclockers.co.uk/showproduct.php?prodid=CA... - 700w

I have no idea wether or not I need to spend more money on one of the bigger ones or not for this system. Here is a list of other components it will be powering.

Asus M4A79XTD Evo - http://www.overclockers.co.uk/showproduct.php?prodid=MB...
AMD Athlon II X4 Quad Core 635 2.90GHz - http://www.overclockers.co.uk/showproduct.php?prodid=CP...
GTS 250
4GB of PC3-12800C8 1600MHz RAM
1TB Hard Drive
+ the usual stuff

I really need help here, all answer are VERY MUCH appreciated, thanks a lot guys.
June 27, 2010 9:30:41 AM

Also I forgot to mention, I'm pretty tight on cash now so please don't just say to get the 700w. If I can get by without getting the 700w then please do say.
a c 90 ) Power supply
June 27, 2010 12:21:03 PM

A 600 Watts PSU will meet your needs as stated and also provide for some modest upgrades. The specs on the one you selected claims 80%-plus efficiency, which is good.

Alternatives would be a Corsair PSU between 600 and 650 Watts.

A good, relaible PSU is very important. Just like a good engine in a car.
Related resources
June 27, 2010 12:25:45 PM

Ubrales said:
A 600 Watts PSU will meet your needs as stated and also provide for some modest upgrades. The specs on the one you selected claims 80%-plus efficiency, which is good.

Alternatives would be a Corsair PSU between 600 and 650 Watts.

A good, relaible PSU is very important. Just like a good engine in a car.



Thanks for the reply, but I also forgot to mention that because my mobo has 2 PCI 2.0 slots, I will probably be getting another GTS 250 eventually. And I'll also be getting another 2 sticks of that RAM to fill up all 4 slots. Would this mean that I'd have to get the 700w or would the 600w still be sufficient?

Also I'd much appreciate it if you (or someone else) told me how to figure this out for myself for next time I build a PC. Thanks again
a b ) Power supply
June 27, 2010 12:25:52 PM

A quality 450W PSU is enough if you are thinking about NOT doing SLI.

Here you have some good options:

CORSAIR VX450 450W (by Seasonic)----64
http://www.overclockers.co.uk/showproduct.php?prodid=CA...

COOLER MASTER Silent Pro M 500W (by Enhance Electronics)...67
http://www.overclockers.co.uk/showproduct.php?prodid=CA...

ANTEC TruePower New 550W (by Seasonic)...70
http://www.overclockers.co.uk/showproduct.php?prodid=CA...

I recommend you to go for the ANTEC TruePower New 550 due to its affordable price and great performance.

As I can read, you want to do SLI in the future. I would go for these ones:

COOLER MASTER Silent Pro M 600W (by Enhance Electronics)...78
http://www.overclockers.co.uk/showproduct.php?prodid=CA...

ANTEC TruePower New 650W (by Seasonic)...85
http://www.overclockers.co.uk/showproduct.php?prodid=CA...

The ANTEC TruePower New 650W would be my choice.
a b ) Power supply
June 27, 2010 12:34:12 PM

basically, for your average video card (the 250 is about average) you need 450-500 watts for 1 card and some room for oc'ing. you need a 750 watt for 2 cards and oc'ing, and you need 1000 watts for either 2 dual gpu cards, or 3 single gpu cards. for this, you need a good quality 500 watt psu, and this is a good one like:

http://www.overclockers.co.uk/showproduct.php?prodid=CA...

http://www.overclockers.co.uk/showproduct.php?prodid=CA...

http://www.overclockers.co.uk/showproduct.php?prodid=CA...
a c 90 ) Power supply
June 27, 2010 12:47:04 PM

sOul rEapER 13 said:
Thanks for the reply, but I also forgot to mention that because my mobo has 2 PCI 2.0 slots, I will probably be getting another GTS 250 eventually. And I'll also be getting another 2 sticks of that RAM to fill up all 4 slots. Would this mean that I'd have to get the 700w or would the 600w still be sufficient?

Also I'd much appreciate it if you (or someone else) told me how to figure this out for myself for next time I build a PC. Thanks again


Here is a handy tool for calculating PSU requirements future use: http://www.corsair.com/psufinder/default.aspx

And yes, the 600Watts PSU that you selected will handle your future upgrades as you mentioned.

And now get ready to watch the World Cup game and best of luck to the English team (my neighbor is from England)
a b ) Power supply
June 27, 2010 12:49:58 PM

GO ENGLAND!!!!!! :D 
a c 90 ) Power supply
June 27, 2010 12:55:06 PM

Time to chill the cider!
June 27, 2010 1:00:27 PM

ares1214 said:
basically, for your average video card (the 250 is about average) you need 450-500 watts for 1 card and some room for oc'ing. you need a 750 watt for 2 cards and oc'ing, and you need 1000 watts for either 2 dual gpu cards, or 3 single gpu cards. for this, you need a good quality 500 watt psu, and this is a good one like:

http://www.overclockers.co.uk/showproduct.php?prodid=CA...

http://www.overclockers.co.uk/showproduct.php?prodid=CA...

http://www.overclockers.co.uk/showproduct.php?prodid=CA...



Well that helps, but theres a couple of little things I need to know about what you said (and also you and "Ubrales" are on a COMPLETELY different level when it comes to this and I don't know who to believe). Honestly I trust Ubrales more simply because it makes more sense, but please do prove me wrong.

First of all, the PSU I talked about originally, it seems pretty good to me, OCZ is a good brand, It says it does the same thing as the rest but slightly cheaper, so what is wrong with it? Also why do I need 750w for dual cards when any PSU over 500w says its SLI compatible?

And by the way you said you would sell the 250 and get the 465, but you see the thing is it's easy to say that and don't you think that if I had the money I would have thought about getting a card that is a whole £150 more expensive than the one I have? Lol
a b ) Power supply
June 27, 2010 1:07:46 PM

well ocz is good, but the psus are mediocre. the wattage isnt what is most important, its the amps per rail, and number of rails, as well as efficiency. for example, the ocz you linked, has 4 rails, with 18 amps a rail, thats pretty weak. the corsair, has 1 rail with 60 amps. you might think, well 4 is better than 1, and 4x18>60, but it doesnt really work that way. also, most of the psu i liked were more efficient, which means they are better with the ac dc conversion.
a c 90 ) Power supply
June 27, 2010 1:16:29 PM

I would recommend Corsair PSUs because:

1. Corsair PSUs are single rail (the multi rail is old technology).
2. Most Corsairs are 80+ efficiency.
3. Rock solid
4. Top notch tech support (I called them on some extra cables, not tech difficulties)
5. Corsairs come in a nice velvet bag! I would buy it just for the bag. LOL
a b ) Power supply
June 27, 2010 1:18:09 PM

corsair is great, but the best companies are corsair, antec, silverstone, ocz, and some EXTREMELY MASSIVE ones like seasonic. Seasonic is so big, it makes the sun cry, and without seasonic, corsair and a bunch of others wouldnt have nearly as good psu, ENTIRELY changing the WHOLE psu market. pretty much NEVER buy a psu from any other company.
a b ) Power supply
June 27, 2010 1:22:33 PM

Ubrales said:
I would recommend Corsair PSUs because:

1. Corsair PSUs are single rail (the multi rail is old technology).
2. Most Corsairs are 80+ efficiency.
3. Rock solid
4. Top notch tech support (I called them on some extra cables, not tech difficulties)
5. Corsairs come in a nice velvet bag! I would but it just for the bag. LOL


Incredible... :lol:  You are really funny.
June 27, 2010 1:24:22 PM

Ubrales said:
I would recommend Corsair PSUs because:

1. Corsair PSUs are single rail (the multi rail is old technology).
2. Most Corsairs are 80+ efficiency.
3. Rock solid
4. Top notch tech support (I called them on some extra cables, not tech difficulties)
5. Corsairs come in a nice velvet bag! I would but it just for the bag. LOL




6. They are about 20% more expensive than anything else...
a b ) Power supply
June 27, 2010 1:26:50 PM

that is true, but the psu is one thing u do NOT want to skimp out on and buy the cheapest one. basically, for xfire, get the cheapest antec, corsair, or silvestone 750 watt psu, and by cheap i just mean not the super high end versions.
June 27, 2010 1:29:44 PM

ares1214 said:
that is true, but the psu is one thing u do NOT want to skimp out on and buy the cheapest one. basically, for xfire, get the cheapest antec, corsair, or silvestone 750 watt psu, and by cheap i just mean not the super high end versions.


Ok now I'm getting confused, because the Antec ones are all 4 rail (at least in this price range), so does 1 rail or 4 rail REALLY make that big a difference?
a b ) Power supply
June 27, 2010 1:33:13 PM

no, no, no, it is just a different way of approaching it. think of it like this, you have a quad core at 3 GHz, and a single core at 12 GHz. it just a way of spreading it out for added protection *IF IMPLEMENTED CORRECTLY. one isnt better than the other, in most cases. the way they do it is the single rail ones are usually more powerful, but the multi rail ones are safer, and give over voltage protection, but it doesnt really matter either way.
a b ) Power supply
June 27, 2010 1:39:24 PM

Ubrales said:
1. Corsair PSUs are single rail (the multi rail is old technology).


Somebody should tell to Enermax, Seasonic or Delta Electronics that they are making old technology PSUs as soon as possible.

Ubrales said:
2. Most Corsairs are 80+ efficiency.


Nowadays most PSUs are 80+ certified (at least), not only the PSUs from Corsair.

Ubrales said:
Corsairs come in a nice velvet bag!


No comments...
Toxic. [:henry chinaski:5]
June 27, 2010 1:43:04 PM

ares1214 said:
no, no, no, it is just a different way of approaching it. think of it like this, you have a quad core at 3 GHz, and a single core at 12 GHz. it just a way of spreading it out for added protection *IF IMPLEMENTED CORRECTLY. one isnt better than the other, in most cases. the way they do it is the single rail ones are usually more powerful, but the multi rail ones are safer, and give over voltage protection, but it doesnt really matter either way.


Ok well going by what you guys have said, and my price range, this is what I've come up with. Let me know what you think.

http://www.overclockers.co.uk/showproduct.php?prodid=CA...
My original choice and still think it's a good one now I know the number of rails make no difference

http://www.overclockers.co.uk/showproduct.php?prodid=CA...
Found for £82, I think it's good, single rail too, but not modular. So far its either this sacrifice, or the 1st one

http://www.overclockers.co.uk/showproduct.php?prodid=CA...
I really don't see any reason to fork out an extra £23 for this. It does what the 1st two do, but for £23 more. Efficiency is more or less the same too.

The Corsair from this range has 99% the same specs as my second choice, but £30 more. So big fat NO there.

So, 1st or 2nd one? Or give me a very good reason to fork out the extra £23 for the 3rd one. Thanks ^^
a b ) Power supply
June 27, 2010 1:46:34 PM

easily the 2nd one, first one is mediocre at best, 3rd one is too expensive. also, in the good list of psu companies, i forgot enermax and cooler master (most of the time).
June 27, 2010 1:49:14 PM

ares1214 said:
easily the 2nd one, first one is mediocre at best, 3rd one is too expensive. also, in the good list of psu companies, i forgot enermax and cooler master (most of the time).


Ok time to bug you some more xD

Why is it mediocre? It actually has 1% better efficiency than your choice.

Also I thought you said OCZ was good? So which models were you talking about?
a b ) Power supply
June 27, 2010 1:57:49 PM

its mediocre because it is very underpowered, and not as high build quality as antec, corsair, and silverstone.
a b ) Power supply
June 27, 2010 2:17:52 PM

hmmm, yeah that seems fine, the gts 250 isnt a very power hungry card, and that should be enough for sli.
a c 90 ) Power supply
June 27, 2010 2:51:07 PM

sOul rEapER 13 said:
6. They are about 20% more expensive than anything else...


We have two old expressions here:

"If you want good oats, you have to pay a good price; oats that have already passed through the horse are a little cheaper!"

AND

"The bitter taste of poor product remains long after the sweetness of low price is gone!"


The PSU is the engine that powers the system. That's why I chose Corsair.
a c 90 ) Power supply
June 27, 2010 2:54:22 PM

2130288,20,594663 said:
Somebody should tell to Enermax, Seasonic or Delta Electronics that they are making old technology PSUs as soon as possible. ]

Yes, somebody should tell - TIME WILL TELL!
a b ) Power supply
June 27, 2010 3:58:58 PM

Ubrales said:
2130288,20,594663 said:
Somebody should tell to Enermax, Seasonic or Delta Electronics that they are making old technology PSUs as soon as possible. ]

Yes, somebody should tell - TIME WILL TELL!
said:


Since you have told it to them, thanks god, they know it now. [:henry chinaski:2]

Seriously, some statements that are made in the forums are really toxic.
a c 90 ) Power supply
June 27, 2010 4:15:42 PM

Henry Chinaski said:
Since you have told it to them, thanks god, they know it now. [:henry chinaski:2]

Seriously, some statements that are made in the forums are really toxic.


Henry, nothing personal, but in my experience I have seen some instances of technical practices (by Siemens AG) that were totally contradictory to good manufacturing technology. I, single handedly changed some of those technical procedures through technical analysis, data, and solutions. Everything was documented in Siemen's Technical Reviews and my recommendations were adopted.

Same situation with a specialty machine manufacturer in Rockford, IL. They told my boss that they had been designing their machines for over 20 years their way without a good technical explanation as to why, and hands-down accepted my recommendations which were totally different from what they had been doing for over 20 years.

Therefore, I am NOT hesitant to analyze a technical situation if it affects me, and I don't care about which company is doing what, or how large the company is. Period.

Sometimes, companies, and people, are so ingrained in their manufacturing practices that they cannot easily change.
a c 243 ) Power supply
June 27, 2010 4:26:13 PM

Henry Chinaski said:

Seriously, some statements that are made in the forums are really toxic.

Don't know about toxic, but certainly amusing.
Like this one;
"corsair is great, but the best companies are corsair, antec, silverstone, ocz, and some minor ones like seasonic"
a b ) Power supply
June 27, 2010 4:30:39 PM

seasonic isnt as well known as corsair, antec, silverstone, and ocz, but are still good, so hows that amusing? :heink: 
a c 243 ) Power supply
June 27, 2010 4:51:33 PM

ares1214 said:
seasonic isnt as well known as corsair, antec, silverstone, and ocz, but are still good, so hows that amusing? :heink: 

They are fairly well known and provide the oem platform for a number of Corsairs and Antecs, among others.
a b ) Power supply
June 27, 2010 4:56:26 PM

right, but not AS well known, they are more considered minor...
a c 164 ) Power supply
June 27, 2010 5:00:19 PM

delluser1 said:
Don't know about toxic, but certainly amusing.
Like this one;
"corsair is great, but the best companies are corsair, antec, silverstone, ocz, and some minor ones like seasonic"


hopefully one day seasonic can build PSU as well as antec and corsair.....

PS. the best PSU is Broadway! $15 for a PSU power cord and a free paper weight!!

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
a c 164 ) Power supply
June 27, 2010 5:01:39 PM

ares1214 said:
seasonic isnt as well known as corsair, antec, silverstone, and ocz, but are still good, so hows that amusing? :heink: 


because corsair, antec, ocz are just names on the box. they don't actually build the PSU as seasonic does and makes them for antec, corsair, xfx, among others.
a c 164 ) Power supply
June 27, 2010 5:02:23 PM

ares1214 said:
right, but not AS well known, they are more considered minor...


by who? they are major player in computer PSU
a b ) Power supply
June 27, 2010 5:04:03 PM

yes, i realize that, but they are not considered major by most people. go ahead, start a poll asking people who they think are the major psu suppliers, a lot of people wont even know who seasonic is, unfortunately considering they make the psus that the major companies use.
a c 164 ) Power supply
June 27, 2010 5:10:46 PM

ares1214 said:
yes, i realize that, but they are not considered major by most people. go ahead, start a poll asking people who they think are the major psu suppliers, a lot of people wont even know who seasonic is, unfortunately considering they make the psus that the major companies use.



done

http://www.tomshardware.com/forum/284764-28-seasonic-mi...
a b ) Power supply
June 27, 2010 5:14:04 PM

thats not biased or anything :pfff:  thats like me saying "you guys havent heard of seasonic, right?"
a b ) Power supply
June 27, 2010 5:19:35 PM

and hearing about is a lot different than purchasing from, thats what determines your position in the market. ive heard of palit, doesnt mean ive ever bought from them, and if a lot of people havent, then palit is a minor player.
June 27, 2010 5:19:48 PM

This conversation is bloody mervelous ;) 
a b ) Power supply
June 27, 2010 5:22:39 PM

haha, but also very, very, very pointless. would it make everybody feel better if i took out the minor, and put in "so massive they almost have a monopoly on the market!"? :lol:  i dont see why any of this matters anyway, its so far off topic, minor, major, if they make good psus, then its a good company, thats all that matters.
June 27, 2010 5:27:29 PM

ares1214 said:
haha, but also very, very, very pointless. would it make everybody feel better if i took out the minor, and put in "so massive they almost have a monopoly on the market!"? :lol:  i dont see why any of this matters anyway, its so far off topic, minor, major, if they make good psus, then its a good company, thats all that matters.


And 1 point goes to the blue team! Now all you other fools just shush :D 
a b ) Power supply
June 27, 2010 5:31:09 PM

hahaha, im i the blue team?
June 27, 2010 5:32:35 PM

ares1214 said:
hahaha, im i the blue team?


Yep and you have team mates :pt1cable: 

Man this is the most off topic thread ever...
a b ) Power supply
June 27, 2010 5:42:07 PM

yeah, back on topic everybody! O BUTTERFLY! :lol: 
a c 164 ) Power supply
June 27, 2010 7:45:21 PM

ares1214 said:
and hearing about is a lot different than purchasing from, thats what determines your position in the market. ive heard of palit, doesnt mean ive ever bought from them, and if a lot of people havent, then palit is a minor player.


lol you don't think people will purchase a seasonic PSU?
a c 90 ) Power supply
June 27, 2010 8:41:14 PM

sOul rEapER 13 said:
Yep and you have team mates :pt1cable: 

Man this is the most off topic thread ever...


Back to cider!
a b ) Power supply
June 27, 2010 9:30:34 PM

ct1615 said:
lol you don't think people will purchase a seasonic PSU?


i said not as many people do!
!