Can 450W PSU handle HD 6850??

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shreejan86

shreejan86

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May 24, 2010
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I ordered Sapphire Radeon HD 6850 from Amazon which has not yet been delivered. The issue is currently i only have a 450W PSU (Cooler Master) and the recommended is 500W. So will the card work and will i have any problems??

And, i have read reviews about the Sapphire HD 6850 on Newegg and Amazon. There were a number of reviews claiming PC crashing with this card installed. Any one of you had such issue?
 
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If your PSU were a Seasonic or Antec, I'd say you were safe; but it's a Coolermaster, and an old one at that. I wouldn't expect more that 26A out of those combined +12V rails, and even that may not be clean. Yes, the label is a lie, and no, the parasites don't do much about this sort of consumer fraud.
 
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Have you seen that or just repeat something you heard?

For that to happen need:
a) The AC Fuses not to cut the current.
b) PLL locks in oscilators to fail "somehow". Their timings windows are narrow.
c) The MoBo electronics do not react fast enuff to the lack of Power_OK Signal
d) The voltage sensors of the CPU fail. If a CPU do not like their supply they just beep (LONG beep, PAUSE, LONG beep. repeat)


Have not happend to me in over 15 years arround hundreds computers. Either just a urban mith or faulty components but that happend for all brands and rated capacities and at any time.

And the least probable time to do is at power up. If they do is plain bad luck.
 
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So it didnt happen to you so its a Myth :pfff: Anything else not happen to you ? I bet there is lots so they must all be myths as well then.
Please learn of what you speak before making stupid statements.

Mactronix :)
 
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I will do when you showme your degree at electronics and know what are you talking about.

Else go and grab a soldering Iron and get some REAL WORLD experience before repeating someting said it happend to someone friend.

That´s the real stupidity
 
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Mamailo, you are wrong. It is as simple as that. If you want to learn enough electronics to understand why, check out the tutorials at HardwareSecrets, then read some of their reviews of cheap PSUs. Then go read some of the reviews of cheap PSUs at jonnyguru; they aren't the only site which has lost test equipment when a cheap PSU detonated.
 
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As I said i can speak for myself and for nobody else.

Even the cheapest PSU need to be comercialized and the UL basic test includes overcurrent parameters. If they do not pass then can not be sold.

If a PSU fails is because is faulty and that happen to ANY brand or rated capacities at any time.

The original poster implies His/ Her PSU is OK there is NO reason to extrapolate a failure.
 
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Are you that naive? The PSU could have a liar label, the UL number could refer to another unit or be outright bogus; there are any number of dishonest things the company may have done, however because the "right" parasites have been paid (typically indirectly), the government does not see fit to do its job to protect the rights of consumers.
 
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Can't remember what psu it was but i looked for a review of this typical low priced peace of crap psu ( not the one from this thread ) and it was really funny ;
It was from a guy who bought it and while being in the bathroom heard loud crackling sounds like fireworks going off. He quickly went to his bedroom and saw all smoke and sparks gomming out of his pc which was on at the time he went in the bathroom. Pulled out the power cord and had a totally burned through peace of modern art.
This guy was so happy he was home at the time, otherwise it could have taken the house with it he stated . . .
Review on Newegg, could be urban myth though.
I do agree this was a faulty one but there were quite a few bad reviews about that one so there really is a difference between quality and cheap junk, also with the protection stuff.

Also ; i rather have my advice from guys in the field than someone who thinks he knows it all because he has a degree . . .
 
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UL sticks faked from Cooler Master?.
NO WAY. I mean is not Thermaltake but is not a basament based operation.

"Are you that naive?"

What I am is experimented.

I live in a third world country an see all kinds of SG6105DZ or derivatives based desings in average every 4 days. Those come from oriental countries under all kind of brands.Cooler master have a better desing.

In the bad old days (Grossly old PSUs of 145,200, 300 and some 350 watts) the PWM, linear regulators and voltage supervisors came in discrete chips.

Modern Chips are monolithic. Even if a sneaky manofacturer wanna save cost, the chips will not work. The PLL won´t engage if the voltage supervisor is not working.

So I stand on my word. A modern, healty PSU will refuse to start or shutdown.

Even when I have to check a ridiculous overloaded or close to fail system from a customer; one or more of this things will happen (in no particulary order):

a) The MoBo Beeps (CPU undervoltage)
b) Some leds try to turn on, drives may try spin (power_good handshake failure)
c) Fan of the PSU kinda try to move but it won´t start (PLL did not lock)
d) BIOS report "Could not change the CPU clock" or message like that (MoBo undervoltage)

e) At incresed load, a HALT state is induced in the CPU. Know by many as BSODs (undervoltage/under current). In some MoBos design also trigger a watchdog circuit will send the shutdown order to windows.

f) AC fuse will blow

I agree is stupid to test a suspicious PSU on a live system, there are tools for that like my termaltake PSU checker.

But in THIS Thread the PSU is considered "OK" and I can say to "shreejan86" from the bottom of my heart :

If your PSU can´t feed the video card the system will not boot or will give you HALT states when increased load.

There are thosands millions of systems in the world wich I have saw a few hundreds of them. All have reacted the same way.

Thats all I have saw.

But If ONE cathastropic fail in a million is repeated a million times is considered true by becoming a Myth. Even If the other 999,999 cases is false.

SO:

"i rather have my advice from guys in the field than someone who thinks he knows it all because all because he has a degree . . ."
Or read inet or watch youtube for giving advice.

I can not agree more. Said from someone who has been in the field for the last 15 years.
 
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You are obviously quoting from websites and have no real experience of value yourself or else you would not have posted what you did.
You do realise that in all probability everyone who is trying to correct you knows what you posted before you went and edited them all to make it sound like you know what you are talking about [:mousemonkey:5]

In all honesty I really couldn't care less for myself, what I dislike is when someone who by their own admission has not had any experience of these issues feels it sensible to give out advice on the subject.

Hopefully the OP will weigh the balance of opinion here and come to the sensible conclusion to ignore whatever you post.

Mactronix :)
 
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What is supposed to happen and what does happen are often not the same thing. Mamailo, have you seen what the output waveform looks like on a cheap PSU that is being stressed, or on one with a bad filter capacitor? The voltage may (still) be "ok," but the noise and ripple will be way out of spec, enough to be dangerous.
 
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