@limhongwoon

both are of high quality products,however for what usage do you need a 1kW psu for

if that then even a 750w psu would be more than enough,hdd never consume more than 15w each

effeciency is like this

your pc wants x watts,so the 80%efficiency psu will take 1.2 x from the wall socket to give to your pc

what card do you want to cf actually?assuming it's hd4870\4890,a 650w psu should be fine.but then again,i don't know what's the continuous power\true power the gigabyte psu can supply

JoBigShow,

the cm psu is capable of supplying more than 400w continuously [more than 460w actually,see hardwaresecrets]].that's a large headroom for even a 4890 [even a 5870 can run]

and why is a 600w psu minimum when the pc doesn't use more than 400w?care to explain?

This post has been edited by Racerx: Sep 14 2009, 04:20 PM

abubin,the 80% efficiency is the amount of wattage supplied to the parts compared to the amount of wattage taken by the psu from the power outlet
eg.a psu takes 500w from the mains,give 400w to the components and waste 100w as heat [400/500*100=80% efficiency]

that's way the psu is labeled true power ie.able to supply the rated power at the rated efficiency in this case at 80% efficiency.

don't believe me?ask others or open up the form 5 physics text book

and how much do you think a fan uses?120w?it's less than 10w tops

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Added on September 14, 2009, 7:04 pmsee here
http://www.xbitlabs.com/articles/coolers/d...-wattage_7.html
read that ,a i7 + gtx260+ consumes only 370w full load prime 95 and furmark [not that games go to such extends too]

see here for gtx295\i7 920
http://www.xbitlabs.com/articles/coolers/d...ge_8.html#sect0
..............

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Added on September 14, 2009, 7:11 pmand overclocking doesn't add 300w to the power consumption either

see here
http://www.tomshardware.com/reviews/overcl...i7,2268-10.html
computer parts are also getting more power efficient day by day not the other way around

my point is,why waste money on something that you won't need?

This post has been edited by Racerx: Sep 14 2009, 07:11 PM

yeah,you'll be fine with the psu.if some one comes saying the psu will blow,yes it will but at loads far beyond what you'll pull out of your hardware full load.[it doesn't really blow,just a burst capacitor most of the time]

assuming the hd5870x2 consumes as much power as a gtx295,a 650w psu is enough. i recommend the xigmatek 650w modular psu which costs rm350-380 only.it can and will do the job fine

the strider is not ok price performance ratio wise.you can buy the same psu but cheaper with other brands

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Added on September 15, 2009, 6:12 pmon the other hand,it can also serve your purpose fine

This post has been edited by Racerx: Sep 15 2009, 06:12 PM

here's the review for the psu i recommended [it's manufactured by cwt]
http://www.anandtech.com/casecoolingpsus/s...spx?i=3231&p=10

the only modular psu that i can find in that price range is the silvrestone you mentioned.that is a good psu btw,should be fine for a single high end gpu+quad core cpu

a 400w psu can do it actually,i believe your original psu still can support it.if there's not enough power it'll shut down

still,if you want to change psu,a xigmatek nrp-pc502 500w rm220 should do the job fine

if you are still afraid,you can get the hd4770 rm350-390.it is pretty much as fast as a hd4850 yet uses just a bit more power than your hd3650 under full load

bAsed on reviews,the the hd5850 uses less than 350w under full load.it's safe to say the hd5850 will be fine with the 550w odin
[iinm goldfries even use it for a gtx295+oced e7200 folding,no problems]

m3ow

option 1 300w enough
opyion 2 550w enough

btw m3ow,imo the cm 550w extreme psu will run your i5 pc based on reviews and here
http://www.extreme.outervision.com/PSUEngine

i suggest the silverstone st56f,should cost below 300 right now

i can't find any other 550w true power psus for your budget.try searching around garage sales,maybe you can get a corsair 450w psu there [labeled at 450w yet can supply more than 570w]

personally i'd take the st56f because iinm it has fully sleeved cables.btw the st56f can actually supply around 570w too based on reviews

for 750W the Gigabyte Odin 800W is the best,it costs RM500