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PowerColor Radeon HD 5870 LCS: The GHz Limit, Broken

Benchmark Results: 3DMark Vantage And Crysis

As always, we begin with our only synthetic benchmark, 3DMark Vantage:

The Radeon HD 4890 cards in CrossFire easily best the stock clocks of PowerColor's Radeon HD 5870 LCS, but when it's overclocked, the tables are turned. It looks like the higher core clock of the modified BIOS bests the higher memory clock of the PowerColor-supplied BIOS, but not by a huge amount.

Crysis shows us that, even with an extreme Radeon HD 5870 overclock, this title usually prefers two Radeon HD 4890s in CrossFire. In fact, our overclock does not offer much of an advantage over the stock speeds at all.