Hello,
I'd like to know if I can install a HD 5870 (TDP 192W) in my pc without having to upgrade the 460W PSU. If I have to upgrade the PSU I won't buy the 5870, so I'm happy to approach safe wattage limits if needed.
My 460W PSU(link)
An online PSU calculator says I am currently using 290W with the system I have below:
Core2Duo E6550 2.33GHz
4GB DDR2 RAM
HIS Radeon HD 4850 (147 Watt) - (45W less than the 5870)
Everything else, 3 Hard Drives etc
Is it true that the 5870 requires 40 amps on the 12 volt rails? I've heard people say this is ridiculous as it would equate to a very high wattage, when it's rated at only 192W. Could someone clarify this point please?
Will my PSU support the HD 5870?
I'd like to know if I can install a HD 5870 (TDP 192W) in my pc without having to upgrade the 460W PSU. If I have to upgrade the PSU I won't buy the 5870, so I'm happy to approach safe wattage limits if needed.
My 460W PSU(link)

An online PSU calculator says I am currently using 290W with the system I have below:
Core2Duo E6550 2.33GHz
4GB DDR2 RAM
HIS Radeon HD 4850 (147 Watt) - (45W less than the 5870)
Everything else, 3 Hard Drives etc
Is it true that the 5870 requires 40 amps on the 12 volt rails? I've heard people say this is ridiculous as it would equate to a very high wattage, when it's rated at only 192W. Could someone clarify this point please?
Will my PSU support the HD 5870?