Excerpt: Finally we have the Smart Switch, which controls the dual BIOS that Palit has used with this card. In "normal" mode, the card operates at 750 MHz core / 950 MHz memory. When "turbo" mode is engaged, the card is overclocked to 775 MHz core / 1000 MHz memory - talk about user friendly overclocking!
Palit Radeon HD 4870 Sonic Dual Edition - Overclocked Goodness
14 June 2011
Conclusion: Looking at our data, we can also deduce that increasing memory clock speeds on the Radeon HD 4870 is neither a very efficient nor wise way to squeeze out more performance. Core speed is key, and clearly, the extra 25MHz that the Turbo mode gives on the Palit Radeon HD 4870 Sonic Dual is not enough to give us any notable increase in performance.
Palit Radeon HD 4870 Sonic Dual Edition Video Card Review
29 May 2009
Conclusion: In the past, we have seen pre-overclocked graphics cards blaze through tests their stock-clocked forefathers would have downright choked on. However, the never-ending question with these types of cards has always been whether they provide enough performance over reference-based products to justify their price premium.
Palit Radeon HD4870 Sonic Dual Edition Graphic Card
18 September 2008
Conclusion: T he Palit HD4870 Sonic Dual Edition is a great card, not just on performance but also on price, it competes even with the top end Nvidia GPU at the moment pretty well for a much lower price. I have long been a fan of both nVidia and ATI, but with the 4870 series of cards, ATI has really upped their game and this version of the card from Palit also helps out with a much improved fan over the reference board as well as the easy option of slightly overclocking the card...
Pros: Great Value, DirectX 10.1 Support, Plays all the latest titles, Easy overclocking button
Cons: S, till some driver issues, Games not fully DirectX 10 optimised yet