Techpowerup writes about a new non-reference Radeon HD 4870 graphics card from ASUS with enhanced power circuitry:
The card uses a 4 phase vGPU power circuit along with a 2 phase vMem circuit, making it similar to that of the PowerColor HD 4870 PCS+, while the reference design uses 3 + 2 phases. The PCB uses a 100% conductive polymer capacitor design. The same Qimonda memory chips as those used on reference design boards rounds up the card.
The card runs at reference speeds of 750 MHz Core / 900 MHz Memory. ASUS used its signature Glaciator Fansink cooler for the GPU, which can already be found on many of their other cards but decided to leave the memory chips without active or passive cooling.