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Choosing new PSU to power HD5770

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November 20, 2011 2:36:02 PM

HI Guys
I recently posted a thread PSU Not working after clicking sound: http://www.tomshardware.co.uk/forum/318777-10-working-c..., it seems my PSU is dead so i need to purchase a new PSU

old PSU (not working/dead): Alpine 600W, :http://www.tekheads.co.uk/product/600Watt-PSU-120mm-Red...

new PSU Choices

(1) Alpine 650w PSU: http://www.dabs.com/products/best-value-alpine-650w-psu...

(2) Ace 650w PSU: http://www.ksn-online.co.uk/components-power-supply-uni...

specs of 2nd PSU :
+3.3V +5V +12V1 +12V2 -12V +5VSB
26A 28A 18A 18A 0.3A 2A
650W

which PSU is better? as i need a new PSU which can power: XFX/ATI Radeon HD5770 (Reference Model),as I will also be upgrading my onboard Graphics to this dedicated Graphics card.

XFX/ATI Radeon HD5770 (Reference Model)
http://www.google.co.uk/imgres?q=xfx+hd5770&num=10&um=1...

any answers/opinions would be greatly appreciated :) .
November 20, 2011 3:00:53 PM

could you recommend a good psu?.....
Related resources
November 20, 2011 3:03:00 PM

its recommended that you post full specs of your system.
5770 isn't a demanding card , consumes under 100 W on full load.

problem with second link is it doesn't like specs of PSU i.e. current on different voltage rails.
P.S. i wouldn't recommend either of two because
a) I'm not familiar with brands
b) 14~20 pounds for 650W PSU? i have not heard of such
November 20, 2011 3:08:25 PM

Specs

Packard bell Ixrtreme X5620 (M3720)

Core 2 Quad Q8300 2.5GHz

4GB RAM

640GB WD Caviar Blue

Broken/Dead 600w Alpine PSU

motherbaord with Onboard Nvidia Geforce 7100 Graphics (Upgrading to XFX/ATI Radeon HD5770)
November 20, 2011 3:37:08 PM

any more suggestions for PSU's as i need a good PSU around £35-£40
a c 273 ) Power supply
a b U Graphics card
November 20, 2011 4:48:32 PM

Stick with brand names that have a 3yr warranty.
Any one i suggested will power your specs just fine and are well-known and reviewed units.
Cheap brands that boast 650W seldom can deliver a 350W continous load.
I noticed the unit you link includes no details = red flag!
a b U Graphics card
November 20, 2011 4:58:34 PM

Every PSU that wasn't linked by you in this thread will rn that HD 5770, if you low on cash you can get sometime like this CoolerMaster GX-450 80Plus Bronze PSU which supplies more power than the Corsair CX500V2 and has a 5 year warranty vs the (3)? of the CX500.
a b ) Power supply
a b U Graphics card
November 20, 2011 5:58:29 PM

yummerzzz said:
Every PSU that wasn't linked by you in this thread will rn that HD 5770, if you low on cash you can get sometime like this CoolerMaster GX-450 80Plus Bronze PSU which supplies more power than the Corsair CX500V2 and has a 5 year warranty vs the (3)? of the CX500.


in north america (could be different in the UK) the CX has a one year warranty and the CX v2 comes with a three year.

frankly an antec earthwatt 380w would power a system with a 5770 with no issue

some other budget series besides the earhtwatt and corsair CX

antec neo eco
antec HCG
ocz modstream
ocz ZS

November 20, 2011 6:43:27 PM

lost_in said:
its recommended that you post full specs of your system.
5770 isn't a demanding card , consumes under 100 W on full load.

problem with second link is it doesn't like specs of PSU i.e. current on different voltage rails.
P.S. i wouldn't recommend either of two because
a) I'm not familiar with brands
b) 14~20 pounds for 650W PSU? i have not heard of such


2nd link specs

http://www.ksn-online.co.uk/components-power-supply-uni...

+3.3V +5V +12V1 +12V2 -12V +5VSB
26A 28A 18A 18A 0.3A 2A
650W
November 20, 2011 7:02:46 PM



Thanks for suggestions on those two PSU I'll have a good look at them, also for that PSU I stated above i should use roughly

95W core 2 Quad Q8300 95w=7.9A
ATI HD5770 (100W)/108W=9.0A
others: (Motherboard, RAM, Hard drive etc) 3-4A

Total=19.9A/20.9A

Graphics card 9.0A
95w core 2 Quad Q8300 7.9A =16.9 on one 18A Rail (1st Rail=1.1A spare)

others: (Motherboard, RAM, Hard drive etc) use 3.0-4.0A one 18A Rail (2nd Rail=14-15A spare)


1st Rail= 18A
2nd Rail=18A
Total (each) 18A= Shared 36A



this is what i worked out (roughly)
a b ) Power supply
a b U Graphics card
November 20, 2011 7:28:39 PM

pb18 said:
Thanks for suggestions on those two PSU I'll have a good look at them, also for that PSU I stated above i should use roughly

95W core 2 Quad Q8300 95w=7.9A
ATI HD5770 (100W)/108W=9.0A
others: (Motherboard, RAM, Hard drive etc) 3-4A

Total=19.9A/20.9A

Graphics card 9.0A
95w core 2 Quad Q8300 7.9A =16.9 on one 18A Rail (1st Rail=1.1A spare)

others: (Motherboard, RAM, Hard drive etc) use 3.0-4.0A one 18A Rail (2nd Rail=14-15A spare)


1st Rail= 18A
2nd Rail=18A
Total (each) 18A= Shared 36A



this is what i worked out (roughly)


Even though with your system you should be around 250w during gaming, it's doubtful the PSU you linked can provide stable power on it's 12v rail. I doubt that unit can provide 300-400w power. A solid 650w PSU will provide 50a+ on its 12v rail. On that unit, the 12v rail (its one rail with a split) is highly underpowered which is a dead give away of a bad (and dangerous )PSU. here are some articles that may help you.

difference between three units with the same "stated" power
http://www.anandtech.com/show/3985/three-550w-psus-for-...

review of the antec 380w
http://www.anandtech.com/show/3902/antec-earthwatts-ea-...
November 20, 2011 7:40:48 PM

dirtyferret said:
Even though with your system you should be around 250w during gaming, it's doubtful the PSU you linked can provide stable power on it's 12v rail. I doubt that unit can provide 300-400w power. A solid 650w PSU will provide 50a+ on its 12v rail. On that unit, the 12v rail (its one rail with a split) is highly underpowered which is a dead give away of a bad (and dangerous )PSU. here are some articles that may help you.

difference between three units with the same "stated" power
http://www.anandtech.com/show/3985/three-550w-psus-for-...

review of the antec 380w
http://www.anandtech.com/show/3902/antec-earthwatts-ea-...


@ dirtyferret thanks for the links

im quite new to working out PSU specs such as 12A Rails ect, but i think im now getting the hang of working out all this stuff :D  also those links you provided are really useful & also get that cheaper psu's wont always supply the full 600watts such as a proper quality PSU maybe 400watts or so

the reason im quite new to working out PSU specs is because i just had normal desktops and didn't have to consider the Power requirements for Graphics cards ect :) 

thanks
November 20, 2011 11:07:29 PM

What about this PSU: Coolermaster eXtreme Power Plus 500W

http://www.coolermaster.com/product.php?product_id=3738

http://www.ebay.co.uk/itm/NEW-ATX-COOLERMASTER-EXTREME-...

(1) only £35.00
(2) 70% efficiency at full load (not quite 80% efficency/80+ but its pretty good 70%?)
(3) Good brand name of Coolermaster
(4) Two year warranty
(5) As its a good brand should deliver full 500 watts
(6) also states: With a life-time of 100,000 hours and protection for OVP/OCP/OPP/SCP, these power units are made to last

is this a good PSU to power XFX/ATI Radeon HD5770?
November 20, 2011 11:11:13 PM

davcon said:
Stick with brand names that have a 3yr warranty.
Any one i suggested will power your specs just fine and are well-known and reviewed units.
Cheap brands that boast 650W seldom can deliver a 350W continous load.
I noticed the unit you link includes no details = red flag!


What about this PSU: Coolermaster eXtreme Power Plus 500W

http://www.coolermaster.com/produc [...] ct_id=3738

http://www.ebay.co.uk/itm/NEW-ATX- [...] 235wt_1002

(1) only £35.00
(2) 70% efficiency at full load (not quite 80% efficency/80+ but its pretty good 70%?)
(3) Good brand name of Coolermaster
(4) Two year warranty
(5) As its a good brand should deliver full 500 watts
(6) also states: With a life-time of 100,000 hours and protection for OVP/OCP/OPP/SCP, these power units are made to last

is this a good PSU to power XFX/ATI Radeon HD5770?
a b ) Power supply
a b U Graphics card
November 20, 2011 11:45:15 PM

you won't get a good PSU under the price of the antec i linked, including that CM 500w for $35 and 70% efficiency is rather bad. Also, CM makes plenty of crap along with their decent PSU.

if you simply want to but a cheap junk PSU then go ahead, it's your PC
November 21, 2011 4:05:26 PM

Hey i know CoolerMaster may not be the best when it comes to Manafacturing best quality PSU's But why are they a Crap brand, they make good cases e.g. HAF X & also make some very good case fans

what makes you say its junk?, anyway i think i know all i need to buy a good psu ;) 
November 22, 2011 9:55:23 AM

ok thanks for the link now i understand why not to buy that psu :) 
a b ) Power supply
a b U Graphics card
November 22, 2011 11:04:55 AM

the xfx is a reliable PSU with plenty of power
July 5, 2012 10:21:45 PM

.

!