Windows 7: Will AMD Radeon HD 6450 work on my PC?

The only way to be sure would be to purchase that card or borrow one from someone, and try it.

I wouldn't doubt that you could possibly run that card with a 200W PSU, but IMHO I think you will be disappointed.

A minimum of 400W is AMD's recommendation.


Source of snip: AMD Radeon


PSU's from your link. I would stay with Seasonic or Corsair.
PC-komponentit / Virtalähteet - Jimms.fi



120W to 500W: PC-komponentit / Virtalähteet / ATX 120W - 500W - Jimms.fi

520W to 775W: PC-komponentit / Virtalähteet / ATX 520W - 775W - Jimms.fi

Leave your present machine as it is, and save your markka's or Euro's for your new dream machine.

You're most welcome. Glad I could help although the news was not what you were hoping for.

Stephen

Well anyways i bought this HD 3850 1gb DDR3 so i won't have to go later buy it.
I set the card in the right slot (fan did run so it worked) and after turning my PC on, there came only beep beeping sounds and won't start up. Is it because of the power supply?

Possibly. We need to know how many beeps there were to diagnose the issue but the PSU is probably the culprit

It was like Beep Beeep (wfhhhhhhhhhh (graphic card fan) whz....) Beep Beep, then i turned off my computer. My friend told me to buy motherboard and case.
But i also think that i should buy case & PSU
CoolerMaster Elite 430 ATX-kotelo, musta | 59.00e - Jimms.fi
Corsair 600W CX V2 Builder Series, ATX-virtalähde, 80Plus | 65.00e - Jimms.fi
So we both agree each other. I really appreciate of this help i get And i hope i won't break my computer after putting those in my new case etc...

Hmmmmmmm. As no other hardware has been changed apart from the graphics card that is causing the issue or the PSU. Some times the computer will issue specific beep codes when they perform POST (power on self test) to give a hint on the issue. Can you either, boot with the intergrated graphics/old gfx card or boot into the BIOS?

Stephen

I'm not sure if i get this right...When i boot my pc with the intergrated (old gfx) It gives always one beep at start. But this 3850 it gives this voice: Beep Beeep (wfhhhhhhhhhh (graphic card fan) whz....) Beep Beep and repeating it. (black screen)

Not even close. Might want to divide that number by about 10 and then you'll be close to what that card uses,

AMD Radeon HD 6450 512 MB Review | techPowerUp

6W at idle, and a whole 24W average. The reason that AMD and Nvidia overstate PSU requirements is to avoid people from using the cards in just this situation. And here is a very good example of why they state what they do,

Small wonder that it won't work with that card, as the 3850 users about 3x what the 6450 does,

Video Card Comparison - GPUReview.com

The HD 6450 will likely work just fine on a 220W power supply as long as it is of decent quality and not some no name piece of junk. The HD 3850, no way will it run on a 220W power supply.

Apologies for confusing you. I'll try again

Sometimes motherboard give out certain patterns of beeps when the computer has an issue. It might go for example 1 beep, pause, 2 beeps, pause, 1 beep. Let it finish beeping unless it is one constant beep. If it gives out a detectable sequence, report it back.

If no beep pattern is recognisable, remove the card and install the old one back in. Can you boot again. If you can, put the new one in and try again. It might work. If not, can you boot into the BIOS? This is usually done by pressing Delete, F2 or F1 when the computer first starts, before going into windows. If yes, report back.

Hope this is clearer.
Stephen

As Tekno Venus said, try booting without the new card. If the computer boots with the old hardware configuration, chances are the graphics card can't run with the current power supply. I would go aheard and get the 600 watt PSU you linked to if I were you. If it can fit in the old case, I wouldn't worry about getting a new one too much. I definitely don't see how a new motherboard would help, but I might be missing something.