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Visiontek Radeon HD4870 Overclocking ATi reference design calls for 750MHz on the core and 1900MHz on the GDDR5 memory clock. Using the Catalyst Overdrive panel we played around until we found the stable ceiling of our test card. Playing hit and miss of finding the sweet spot we all love so much. We found a maximum overclock of 780MHz and 4280MHz (1070x4) on the core and memory respectively. Let's load Crysis back up to see what this does for our frame rates.
Not much of a practical increase I'm sorry to say as you can see above. Image Quality Beauty is in the eye of the beholder. Below are screen shots from Assassin's Creed and Crysis below. Assassin's creed was at max settings with screen resolution to 1920 x 1440. Crysis had all its settings changed to 'very high' and screen resolution kicked up to 1600 x 1200. Not that this was playable in Crysis mind you; I just want to give you an idea of the caliber of eye candy that is available.
Conclusion The HD4870 is a fine card and Visiontek brings it to market for less than its competitors. As we have seen in Crysis and UT3, the HD4800 series holds its ground very well. The HD4870 fell behind the dual processor HD3870x2 in Assassin's Creed but was far from sluggish as you saw. The HD4870 brings modern DVI, HDMI, Blu-Ray and the option of running two cards in CrossfireX to the table at a price that isn't frightening. ATi has scored a big hit here and deserves all the accolades it is now getting. Raw muscle is here in plenty as is image quality. Priced at $285, the Visiontek HD4870 is a hard card to say no to for your next upgrade. I think the only thing that may be more tempting would be a pair of HD4850 cards running in CrossFireX for $100 more. Other than that, a worth while product well worth consideration for your next upgrade. Pros
Cons
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Introduction
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