3870x2 wont start

[lgs7]

Before 10 days i bought the asus hd3870x2.When i installed the card correctly(2x6pin cables,i dont have a 8pin.the card normally requires one 6pin and one 8pin)and started up my computer,when it booted the screen showed something like when the tv doesnt have good signal.i tried the other video exit and when it booted,it was like standby mode

my psu is the problem?i was thinking to buy a new adaptor for the card.sorry for my bad english

my pc:Intel PentiumD925 3.0GHz

3gb ram

400watt psu no name

500gb hdd

[CommanderCrazy]

PSU. You need a new one at my guess.

You could try an adaptor, but I dont know if it would have enough power output.

[nosisab]

I wonder why?

 

Beyond the wrong connector, that noname PSU can be bellow the specification for that card, you must verify the 12V rail amperage and even that may not be enough if the stated potency value is not true RMS, as sadly 'artificial' potency measures were a common practice with PSUs just like with audio amplifiers.

 

PS: Better not trying to run that high end dual card (for it's generation) with anything less than a 500W, reliable PSU, from a reputed manufacturer.

[JimboUK]

You need something like this, then cross your fingers and hope that your PSU is up to it and that you've not damaged the card.

[Paxan_1]

Hi lgs7,

 

i think the PSU could be a problem.

You can calculate it here:

 

http://www.be-quiet.net/be-quiet.net/?StoryID=1&websiteLang=en

 

go to the PSU Calculator tab on top of the page and have a check with your built in components.

[nosisab]

I want to point, again, to the 'problem' that plagued PSUs like does until today with sound amplifiers.

 

The point is the stated amperage on the rails can't be relied. The Watts could not be RMS. All those artifacts to tell a product is more than it really is.

 

Notice that does not means a lie, just the truth is not said. Most of times the high potency advertised means the PSU can keep it for a few seconds (transient) before going down, sometimes corrupting data in HDs or seriously compromising hardware integrity.

 

The OP should seriously consider buying a new PSU, preferably one that would allow eventual CPU upgrade too. Those around and bellow 400W almost certain are from that time where advertising high potency was more important than delivering TRUE potency.

 

PS: It's important to notice the OS being able to start and some applications to run without problems does not mean the PSU will cope with the demand on high demanding applications, like games for example. Worse yet, it may do for some appls and for others for some time, but when the issue manifests it can do a greater harm.

[bben46]

One of the sites that tests computer components posted a test of power supplies last year. (I forget which one) Their findings were that many power supplies were over rated and could not put out the claimed power at all. Some by as much as 30%. The no name supplies were some of the worst with several actually blowing filter capacitors when loaded to near full rating, and others overheating (fire hazard) then failing. The cheap ones also had no protection circuitry which will cause a lot of damage to other computer parts when they fail - motherboard, video cards, audio cards, hard drives etc. A good name brand supply will protect your investment while a cheap no name supply can destroy your computer.

 

When selecting a new power supply be sure to look at the Continuous rating and NOT at the peak rating. As the cheap supplies will put the peak (which it can only supply for a very short time before failing) in large type, and the continuous in small or hidden in a paragraph of small print.

[lgs7]

Yes i know that my psu is bad,i will buy a good 550-600watt psu.When i say adaptor,i mean the adaptor that does the dvi to normal.But i wonder how my psu worked 100% with the radeon hd 4870.Did i burned the card?

[CommanderCrazy]

"Reliable PSU, from a reputed manufacturer."

 

Antec is definitely one of those. I recommend.