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Is 450w enough for 4850+E8400

Forum CPU & Components : Power Supplies, PC Cases & Case Mods - Is 450w enough for 4850+E8400

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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:

Add a reply

Yes ... barely.

Talk to the graphics guys below ... they will probably suggest a better PSU.

Here is something similar.

http://www.tomshardware.com/forum/ [...] ply-issues

------------------------------ Great spirits have always encountered violent opposition from mediocre minds

Reply to reynod

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.

Reply to jsc

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?

Message quoted 1 times

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

Reply to b3nanas

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

Message edited by b3nanas on 08-24-2009 at 09:18:05 AM

Reply to b3nanas

State the PSU's brand/model. Hopefully it isn't a C4 camuoflage in a form of PSU.

Reply to masterjaw

theAnimal wrote :

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- [...] upply.html

Do you think it`ll work on for the 4850 and my CPU the E8400 3.0 ghz
Thanks for your help so far

Reply to b3nanas

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

Message quoted 1 times

Reply to masterjaw

masterjaw wrote :

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

Reply to b3nanas

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.

Reply to masterjaw

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.

Message quoted 1 times

Reply to szymek

szymek wrote :

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.

------------------------------ q9650 @ 4.050 | Asus Rampage Formula | 2x2 & 2x1 Corsair Dominators | WD Black 640 x2
EVGA GTX260 Core216 @ 686/1479/1103 | Antec TPN 750

Reply to Delluser1

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..

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