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Power I need,,,,,,,,,,,,

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August 2, 2010 10:58:09 PM

How much power I need for a computer with these specs

I will use this com for gaming.

Case-CM Elite 310
Processor-Intel I3-550
Motherboard- Asus P7P55D-EVO
Graphics Card-Sapphire 5850 1GB
Ram-2X Corsair XMS 1333mhz 240 pin DDR3
Psu-Corsair modular HX 620
Optical Drive-Lite-on 24x
Sound Card-Creative labs X-FI titanium
Hard Drive-2x WD 500gb 7200rpm sata
HD monitor-BenQ V2220

So..in a case where I dun overclock a power of 620 is enough?While if I want to overclock the CPU and Graphics card the PSU may need about 1000 watts?

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a c 243 ) Power supply
August 2, 2010 11:42:01 PM

Overclock all you want, you have plenty of power with the HX 620.
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August 3, 2010 12:05:04 AM

delluser1 said:
Overclock all you want, you have plenty of power with the HX 620.



Then why is it some people need to use until a 750 watts for computer with an older specs than my.And nowadays some people even used a 1250 watts PSU?
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a c 139 ) Power supply
August 3, 2010 12:36:23 AM

They might be using 2 video cards?
Having a 1250watt PSU installed isn't the same thing as having a system that uses that much. They might actually be using about 600watts.
Some think their 'powerful computer' can't be so 'wimpy' as to only need a 600w PSU.
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August 3, 2010 12:44:55 AM

WR2 said:
They might be using 2 video cards?
Having a 1250watt PSU installed isn't the same thing as having a system that uses that much. They might actually be using about 600watts.
Some think their 'powerful computer' can't be so 'wimpy' as to only need a 600w PSU.




Hmmm its my classmate that want to use 1000watts or something. Hmmm so if I add neons in how much watts is needed?
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a c 243 ) Power supply
August 3, 2010 1:15:06 AM

WR2 said:

Some think their 'powerful computer' can't be so 'wimpy' as to only need a 600w PSU.

Well said.
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a c 139 ) Power supply
August 3, 2010 2:41:11 AM

You can use one of the Power Supply Calculators like: http://extreme.outervision.com/psucalculatorlite.jsp
or http://www.antec.outervision.com/
These calculators recommend the size of PSU - not the actual power consumption of the system.

I gave it a shot using a few tricks. Like using a 5870 in place of 5850 to simulate an OC'd 5850.
Since the i3 550 isn't listed yet I used an OC'd i3 540 @4.2Ghz. Added a few extra HDDs/SSD, another optical drive, 3 CCF lights, a few extra fans, etc. Ended up with a 600W PSU. For 2x OC'd HD 5850's it was 750W.
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a c 139 ) Power supply
August 3, 2010 2:52:24 AM

And that 600W recommendation would be an 'average' 600W PSU.
That Corsair 620HX is a fair bit above an 'average' 600W PSU I would say.
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August 3, 2010 3:00:43 AM

WR2 said:
And that 600W recommendation would be an 'average' 600W PSU.
That Corsair 620HX is a fair bit above an 'average' 600W PSU I would say.



Hmmmmm maybe I would go for 650 watts. or even 750
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a c 139 ) Power supply
August 3, 2010 3:02:46 AM

Do you already own the 620HX? Think of it as a 650W PSU.
If not, and you're still shopping around you can ask for some recommendations.
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August 3, 2010 4:17:23 AM

WR2 said:
Do you already own the 620HX? Think of it as a 650W PSU.
If not, and you're still shopping around you can ask for some recommendations.


No I dun not own a HX 620 yet.What do you mean by think of it as a 650w PSU?
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August 3, 2010 5:20:03 AM

WR2 said:
The +12v rail is what feeds the biggest power using parts in a system: video card, CPU, case fans, HDDs, etc.

Corsair HX620W Power Supply Review has up to 50amps +12v power. And as the review says it can handle loads up above it's actual rated power.

Here is an average 650W PSU: Rosewill Libertas 650W Modular, 80 Plus Bronze PSU It has 50amps +12v power.

A budget 750W PSU: COOLMAX CUL-750B 750W with 50amps +12v power.


What about the Corsair HX 750? If I want that will it be ok?
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a c 144 ) Power supply
August 3, 2010 3:53:44 PM

A 5850 needs about 10 amps. If you do not go into the GPU BIOS to increase core volts, I doubt if current demand will increase by more than 10%.

An overclocked i3-550 won't pull more that 8 amps - with the GPU, that's 240 watts, max
4 GB RAM - no more than 8 amps at 3.3 volts and probably less - 30 watts.
Two HD's and an optical - about 50 watts.
Motherboard, maybe 50 watts.
Audio card - maybe 10 - 15 watts.

Worst case, that's about 400 watts or less.

And an HX-620 will be more than enough.

Corsair PSU's are popular because of their conservative ratings. They are generally operating within their specifications at 15% to 20% over their ratings.

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a c 243 ) Power supply
August 3, 2010 4:06:37 PM

progunnerboi said:
No I dun not own a HX 620 yet.

Don't own one ? Your first post made it seem to me like you did.
Great power supplies, getting hard to find because they've been discontinued and there are better options available now.
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a b ) Power supply
August 3, 2010 4:20:23 PM

How much power I need for a computer with these specs

I will use this com for gaming.

Case-CM Elite 310 not too bad but not too good either,have a look at the antec 300 still the best budget case out today
Processor-Intel I3-550 things are moving faster and faster to multithreaded applications dual cores seem to be getting long in the tooth these days,ideally you want a quad core but amd has found a foothold with triple cores
Motherboard- Asus P7P55D-EVO very good
Graphics Card-Sapphire 5850 1GB excellent
Ram-2X Corsair XMS 1333mhz 240 pin DDR3 you could get better for the price like g.skill,team group,crucial
Psu-Corsair modular HX 620 very good choice getting harder to find lately,was replaced by the hx65o not too long ago which will be replaced by the ax650 next month,but you can have a look at the antec true power new series,seasonic X series(best currently available),xfx but either way you'll be set.you can even run crosfire 5850 on a good 600-650 watts
Optical Drive-Lite-on 24x good
Sound Card-Creative labs X-FI titanium never got the appeal
Hard Drive-2x WD 500gb 7200rpm sata the samsung f3 series are much faster and cheaper
HD monitor-BenQ V2220goodvalue in this

So..in a case where I dun overclock a power of 620 is enough?While if I want to overclock the CPU and Graphics card the PSU may need about 1000 watts?
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August 3, 2010 10:59:51 PM

delluser1 said:
Don't own one ? Your first post made it seem to me like you did.
Great power supplies, getting hard to find because they've been discontinued and there are better options available now.


Sry -.- I havent build this com yet I am just planning to build it with that specs.
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August 4, 2010 12:21:47 AM

obsidian86 said:
How much power I need for a computer with these specs

I will use this com for gaming.

Case-CM Elite 310 not too bad but not too good either,have a look at the antec 300 still the best budget case out today
Processor-Intel I3-550 things are moving faster and faster to multithreaded applications dual cores seem to be getting long in the tooth these days,ideally you want a quad core but amd has found a foothold with triple cores
Motherboard- Asus P7P55D-EVO very good
Graphics Card-Sapphire 5850 1GB excellent
Ram-2X Corsair XMS 1333mhz 240 pin DDR3 you could get better for the price like g.skill,team group,crucial
Psu-Corsair modular HX 620 very good choice getting harder to find lately,was replaced by the hx65o not too long ago which will be replaced by the ax650 next month,but you can have a look at the antec true power new series,seasonic X series(best currently available),xfx but either way you'll be set.you can even run crosfire 5850 on a good 600-650 watts
Optical Drive-Lite-on 24x good
Sound Card-Creative labs X-FI titanium never got the appeal
Hard Drive-2x WD 500gb 7200rpm sata the samsung f3 series are much faster and cheaper
HD monitor-BenQ V2220goodvalue in this

So..in a case where I dun overclock a power of 620 is enough?While if I want to overclock the CPU and Graphics card the PSU may need about 1000 watts?


I dun have a budget to buy a I5 or I7 processor.Then again I am a new in this kind of stuff so I dun really know about AMD much....more on INTEL.And i can still find the corsair HX 650 at shops.
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a c 139 ) Power supply
August 4, 2010 12:25:23 AM

What shops are you looking at?
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August 4, 2010 12:52:29 AM

WR2 said:
What shops are you looking at?


er I am not from the US.But theres a place where the whole building sells all the computer parts.So they may have old stocks and other stuff.
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