Hello,

can anyone here help me,

what is the minimum power do i need to run 2 x HD 5770?

how can i choose my psu?

thank you!

This link; provided by LowYat should be useful.

http://www.extreme.outervision.com/psucalculator.jsp

This post has been edited by Agnaem: Jun 22 2010, 02:45 AM

i believe a good 650w psu would do

Yea,650W real power should be ok...
Same as 2 HD4850..

This website is very good!
tQ Agnaem..


From the calculation above, i shud get minimum of 460W psu.
but the recommended psu is above 500W.
tQ metsatsu..


tQ rxy..

always get a higher power psu to avoid the psu working at 100% full load la.
and the extra head room can be used for future upgrade.

i want to buy Cooler Master Real Power Pro 750W.
What do you think? Cooler Master is a good psu or not?

not sure about this model ler.
but here is the another model, Cooler Master Real Power Pro 850 W Power Supply Review:
http://www.hardwaresecrets.com/article/Coo...pply-Review/538

i thing cooler master real power 750w can handle this...

got cheap sale in garage sales.
http://forum.lowyat.net/topic/1449434

Can recommend the CM GX 650W PSU.
Has 80% Bronze Power Efficiency rating.
Has (2+6pin) x2 power cable for power hungry graphic card.
Price between RM350 - RM400.

LINK

On the box it says minimun req 500w psu for dual crossfire

500watt real is enough bro...but ur psu must have 80% efficiency

yea, get a branded psu with at least 80% efficiency.
most 80+ certify psu should have at least 80% efficiency.


This post has been edited by saturn85: Aug 22 2010, 06:44 PM

thread moved to hardware Q&A section

I've tested with my rig, a good 600W 80+ PSU like my PSU is more than enuff for 5770 CF

I got mine running on 500W PSU, it works fine.

if u get 650w 80+ gold certified,u can even CF 5870..

No lar. 5770 use a lot less power than 4850. 500W True Power should be sufficient.

efficiency has nothing to do with this....
and to cf 2 hd5870,a 600w psu is enough.[ati recommends 600w only,and the y always recommend more than enough aka lots of headroom]

i know its not related coz 80+ is related with power efficiency..save home electric bill..

just wanna give a TS an idea,650 is enuff for CF 5870..

550W is enough.
Avoid getting CM GX series power supply.
They can't stand together with other brand's power supply. (Quality is not so good)
You can get Xigmatek NRP-PC602 600W for RM319.

Source of CM GX series complain/rant/problem please?

I don't know why everybody is boycotting CM's PSU. I've used a few CM's PSUs and no problem before.

Not complaining/problem, but the build quality is not so good.
If you wanted to find out more, you can google, most of the sites didn't give it award in the comparison, while the competitors is being gave award.

Seyz who?? My CM Extreme power 400W can power my 4850 + 4 hard disks with no problem nearly 2 years.

Here's some GX reviews
GX 550W review
More reviews of GX 550W
Review from Indonesia forum pun ada...
A nice review in PDF format

And if there's no complaints/problems/rants...how do you defined "quality not so good"? One look at it with your x-ray vision you know is it? Your myth has been debunked again.

This post has been edited by Matrix: Aug 23 2010, 07:39 PM

matrix,the reviews that you posted aren't good psu reviews.
bearing in mind that most psus in a single range is a modification of a single design,here's the review for the 750w unit.
http://www.hardwaresecrets.com/article/Coo...y-Review/917/10

as you can see there's too much ripple and noise.if it's a cheap unit like the cm epp,then it's a given but on units with such price you can get better ones like this one
http://www.hardwaresecrets.com/article/Sea...y-Review/954/10

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Added on August 23, 2010, 8:10 pmstill,that's not to say it's a bad unit,it's just that for the price you can get better ones.

This post has been edited by Racerx: Aug 23 2010, 08:10 PM

true power?

Ya lor.. o_0
CM PSU is a good PSU what(for me, bcuz i never have any problem with it)

Exactly. This thing I already posted last time too.
Actually, one should know that CM GX is APFC and 80+ but they're cheaper than CM Real Power(also APFC and 80+). So, you know...(quality and performance) I think I no need to explain further already.

For me, when choosing PSU, I would avoid CoolerMaster Brand(even some of it's models are great).
Corsair will be avoided too due to overprice.

and the choice left for silverstone and seasonic..

Yeah

I feel you man. Other brands also have disadvantages lah, but banning CM PSU just for some cases is nothing more than fanboyism that many people hate to admit to be one

What about FSP everst 600W 85+ Real power?????

i have other stuff running also
3 hard disk
7 12 cm fan

can it run with CF 5770???

I didn't boycott all those CM PSU at all.
Just that, some of the models/series are bad. Real Power and Silence Pro Series will always be my choice if their price is as cheap as the other brands.
FYI, I hate Corsair more due to it's stupid overprice.

IIANM skip the FSP Everest 600W i read it has a few probs, if u want FSP brand try looking for FSP Epsilon 600W instead, it is better than the Everest
And yes they can run CF 5770, even SLI GTX460

save the reading, i had one FSP everest 600w, it lasted for 1yr+ before it died out... day by day it is proving harder to turn on, and i hardly press the "power" button for my pc as it is up most of the time. i'd probably blame the power trips for shortening my fsp's life

sucky thing is i only have a 2 year warranty for FSP.

i wont recommend running SLI gtx460 on a 600w psu even on true power, as each card is like 160watts max power consumption... that leaves around 300 watts for your motherboard, processor, hard disks etc etc etc

And that 300w is not enough for motherboard, CPU and HDD? Your GC won't always be operating at peak load.

depending on what motherboard, processor you're using. using low end pentium dual core with regular p43 chipset mobo of course is probably not gonna reach 300w, but if you're talking about 130w stock rated i7 processors which are overclocked and high end motherboards that support 2 way/3way sli and uses multiple 4pin pwm fans and 24pin + 8 pin mobo, then i'd get more watts just to be safe.

although your gc wont always be operating at peak load, no one will be happy when they're having fun playing their games at max settings and OMFG their pc just restarted out of no where.

if you don't care about having the risk of experiencing sudden restarts, then sure, you may SLI gtx460 with 600w rated psu.

Well i thing my system don't eat that much power, i"m running AMD Phenom2x3 710 with 770 c45 mobo

well about the FSP Everest, so far i have use for 6 month, not having any problem just something have thos funny sound like ZZZZZZZZZ

Did u plug in the power cable correctly? In some cases the buzzing noise from psu came from the power connector not connected properly

The sound dose not come from the power plug, is like some from my PSU well not all the time, is like when i im gaming den started to have that wierd sound but just last for 10 sec or so
humm should i bring my PSU for warrently claime

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Added on August 24, 2010, 10:08 pmfor that problem did you off you PSU switch before you main power switch, if im not wrong it affect abit???

This post has been edited by markoton1: Aug 24 2010, 10:08 PM

My friend runs 5830CF + 955BE + 2 HDDs + fancy fans around 4 pieces and a pair of CCFL tubes on Vantec 600W, no problem at all. Mind you gtx460 consumes considerably lesser power than 5830. About the CPU, it's the same case, the CPU is not going to be peaking all the time. It might pose some risks back in a few years ago, but as of the smaller dye fabrication now it's no biggie, as both CPU and GC are the two hardwares that feed on power in a system mostly.

I have never heard of that, but I think many people will not believe it, or the truth is only grain-sized as I bet 95% of people here have never actually switched off the PSU itself for as long as their occupation on computers.

Want to know how much power your rig consumes ? Get a power meter ...

It's a totally useless idea for someone who wanted to buy a rig.

I bought one power meter...hehe...my main rig < 200W on load with SC2 and 3DMark06...(E5400@4Ghz@1.4v and 5750 1GB OCed).

My new download rig is only 70W to 80W ...and can go down to 6xW. (E5300 with EG45M-DS2H integrated X4500HD...). Should have dumped my turtle ATOM 330 rig long ago...I guess the ATOM use 40W or so.

BTW, i never switched off my PSU. Ever. And i haven't have one burned PSU yet.

This post has been edited by Matrix: Aug 25 2010, 09:39 AM

me use 5770cf with unlock 555x2 to x4 oc 3.8ghz/1.45v with acbel 510w..until now no prob stable..i try measure using power meter total under load my pc consume 510w from soket.

it was a power trip, not that i switch off the plug before properly shutting down, heck i never power down my pc unless i wanna add in hard disks... i couldn't have predicted power trips

and, slight buzzing sound coming from your psu could be the active pfc that's kicking in... if your psu has it that is...

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Added on August 25, 2010, 11:21 amhow long has your friend been using the pc? how long does your friend play games in a day? if its all about being idle most of the time, 600w is more than enough, in fact you can try to add in another card on idle mode. if its constant 8~12 hours gaming a day and that your gc and proc are at full load, especially for gc, i'll be surprised that the psu can still last after a year, and that your friend didn't experience any sudden restart within that 1 year period.

i have few cases of my own where i get sudden restarts just from 3dmark vantage/furmark on a 4850cf, but at that time i was having like 8 sanyo denki 103cfm fans running at full speed as well and my proc oc'ed to 4ghz @ 1.3v. i managed to finish the test after i plugged out some fans, and i was running on a 600w at that time. consumption wise, 4850 is more or less like 5770, and my proc's power consumption matches the current i7 @ 130w or more due to oc state. i also have a friend who's on 450w and is complaining about his pc suddenly restarting whenever he plays game for few minutes, especially on intense action areas, and he's using p5q3 and c2q with a 4850oc.

but i also have a friend whos on the same 450w model psu but on a p7p55 and i7 860 with a hd4850oc and experiences no sudden restarts. but i wont be surprised he'll get it once he upgraded his mobo to a maximus 3 formula

This post has been edited by x-1o8-x: Aug 25 2010, 11:21 AM

i would only suggest pc power & cooling psu......

why? suggest to google it

1 month post the release of 5830, now it's time to wait for a few more months for the 'symptom' to kick in?. Heh don't talk about PSU lasting yada yada to me man. Do I need to tell you how my CM EPP 500W still alive and kicking after 2 years powering OCed E8400 to 3.8Ghz + OCed GTX260+? Many called that as impossible, my PSU was gonna explode ohnoeez, but it didn't. Most 80+% PSUs are designed to maintain operating consistency well far above the commonly believed 'ideal' load of 50%. GCs and CPUs power consumption are decreasing, and surprisingly I noted a stupid thing like the standard of required power consumption for a rig with a GC is changing, i.e increasing. And you should correct the info you stated, 5770 consumes relatively around 9600GT, not 4850 which is backed up by the need of only one PCIE connector. With all the HD4000 series you mentioned in your friends' cases, I wouldn't be surprised. Back then nvidia GT9000 range was better at power consumption if compared to the direct competition of HD4000 series. But like I said, things have changed for the better, GTX460 consumes somewhere between a 5770 and 5830. If it is already proven that a 600W could power up 5830CF safely, then why not the lesser GC? OC opportunity? That's why it is a must for a TS to state whether he/she would be OCing his/her rig, then only people here would recommend what wattage is deemed necessary, we don't just simply go straight to the point simply by looking at the GC + CPU

that info is very helpful indeed, and i thank you for that. my info is probably not that accurate as i have no friends that are using hd5000 series atm. 1 month after 5830 releases is not that long, but i believe if problems were to occur, it would have occurred sooner or later. E8400 oc to 3.8ghz with a gtx260+ oc'ed doesn't sound as much as a GTX460 SLi with oc'ed 3.8ghz i7, but you are right, we should consider whether TS will be overclocking his proc/gc and also what type of proc he's using.

Err no, it was done on CM EPP 500W, the PSU that many people were skeptical before With only roughly 420W stable power produced, it is certainly more than enough to power up the combo I mentioned, plus the PSU survival up until now (around 2 years already) should give you the idea that reviews are not everything once you ahve experienced it yourself

510W!!! Cannot be lar...even CF, maybe 300 to 400W only. Are u sure u read correctly? Using the PowerLink Plus? There are a few readings by pressing the 'Func' key. It should be the 3rd one.

erm... im stating based on experience, not reviews

i wont really be skeptical even if its on EPP 500w as the proc you oc'ed is a c2d, which iirc requires lesser voltage to pump for 3.8ghz compared to quaddies for most batches. if you're using quaddie and you pumped more than 1.3v for 3.8ghz, i'd be skeptical then

I wasn't saying at you lah, my point was to inform people that don't take reviews 100% as they are Dual core or quad core, even hexacore it doesn't matter much. I blew a duallie before for pumping over 1.45v so I know how serious it was to play with voltage, the best thing is to avoid vcore tweak unless you are equipped with proper coolant.