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Should be more than fine with four 7870 cards in CrossFireX. The AMD Radeon HD 7870 GHz edition has a typical board power of 175W, so 175W x 4 = 700W. That loosely gives you 550W for the rest of your system, which is a fair amount for the CPU and storage drives.hercules71185 wrote:Do you think it'll handle it or shoukd I settle for 3 cards? I understand 3 cards is still overkill. But the only question I have is will it work or die and take everything with it.
Those cards shouldn't kill anything and your PSU should have no issues.