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Is 450w enough for 4850+E8400

Last response: in Components
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August 23, 2009 1:20:52 PM

Hey everyone,

I wanted to add the 4850 to my computer, and i was wondering if a 450w is enough

My rig is

Asus p5q se plus
E8400 3.0ghz
4 gb pc6400 ddr800
500 gb sata hdd
17" ace power 450W case

I dont really know much about psu's, but im assuming that the 450w is not a good one. Do you guys think the 450w will be sufficient for the 4850??

Your help is much appreciated :hello: 

More about : 450w 4850 e8400

a c 144 ) Power supply
August 23, 2009 1:35:33 PM

If it's something like a 450 watt Corsair, yes. If it's something like an inexpensive (OK, cheap) generic 450 watt PSU, probably not.
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a b ) Power supply
August 23, 2009 3:42:46 PM

The total watts doesn't matter nearly as much as the 12V amps. How many does your PSU have, and does it have a PCIe connector?
August 24, 2009 7:12:49 AM

im not sure if its a 12v amp, how do you check.
i think its one that came with the case, and i dont think it has PCIe connector
all i know is that its a probably not a good psu thats why i`m worried it wont work
August 24, 2009 7:15:17 AM

my rig is new and i havent even finished assembling it yet, i got a 4830 and im going to return it for the 4850 because there was a 25% off deal
even with my 450w im pretty sure it may not even be able to run the 4830 because on the ATI site it says it recommends 450w for both 4830 and 4850. But im just worried because the PSU is probably not good
August 24, 2009 7:42:39 AM

State the PSU's brand/model. Hopefully it isn't a C4 camuoflage in a form of PSU.
August 24, 2009 8:14:12 AM

theAnimal said:
The total watts doesn't matter nearly as much as the 12V amps. How many does your PSU have, and does it have a PCIe connector?



I just found the PSU

http://genericcomputer.com/i-1312-acepower_ACE450W___Po...

Do you think it`ll work on for the 4850 and my CPU the E8400 3.0 ghz
Thanks for your help so far
August 24, 2009 8:35:51 AM

That won't do. Get something like vx450 or a cx400 as a minimum.
August 24, 2009 8:52:35 AM

masterjaw said:
That won't do. Get something like vx450 or a cx400 as a minimum.



I don`t get why the cx400 would work and my current psu won`t because the the cx400 is 400w and the 4850 recommends 450W, as stated on the ati site
Sorry for pestering you guys so much

Your input has been much appreciated, thank you :D 
August 24, 2009 9:06:34 AM

Because your PSU, though it is rated as 450w, isn't performing the way a 450w PSU should do. Your PSU has 19A max at 12v rail (just like a 300w psu) where it should deliver at least 33A of 12v wattage (in case of vx450). The cx400, even though just a 400w can deliver 30A at 12v rail which is still way better than yours.
August 24, 2009 12:36:25 PM

It should work. If I can work on Delta psu 400wat in PEAK with e4700@3.47ghz on 1.42V and 3870 and run OCCTP Power Supply then you will be fine.
a c 243 ) Power supply
August 24, 2009 1:16:59 PM

szymek said:
It should work. If I can work on Delta psu 400wat in PEAK with e4700@3.47ghz on 1.42V and 3870 and run OCCTP Power Supply then you will be fine.

Why would you tell him that ?

400 watt Delta's generally have a 30 amp combined 12 volt output on dual 16 amp max rated rails, his 450 is rated at peak ( is actually only a 400 ) and has a single 15 amp ( normal ? )16 amp ( max ) 19 amp ( peak ) 12v rail, you really can't compare them.
Anonymous
August 24, 2009 6:44:17 PM

I would err on the side of caution (after seeing the damage a popped cheap power supply can do) and get a known good brand psu with 20% mor power than you need, which will result in a very stable PSu as it will not be running near or on its maximum and yuo have a little more room for future GPU or HDD or Memory upgrade!!

PSU is one of the least looked at and most important pieces of hardware in your system and one that you should not skimp on at all..
!