Weeks ahead of launch, Sapphire's Radeon HD 4890 graphics accelerator has already started to to get listed on online stores, not concentrated in a particular region. The HD 4890 is characterized by the upcoming RV790 graphics processor, it is a current-generation successor to the HD 4870 accelerator. Its specifications are unclear, though most sources in the industry and press have so far revealed it not to be much of a featureset expansion over the RV770.

Dutch retailer Salland Automatisering BV has listed the Sapphire-made accelerator for € 253.95 inclusive of VAT (€ 218.95 excluding it). Another retailer, PB Technologies Auckland (New Zealand), has listed it for NZ $613.97 (325 USD), including applicable taxes. The Dutch retailer went on to list some of the card's specifications. It features 1 GB of GDDR5 memory clocked at 3.90 GHz (975 MHz actual). Its core is clocked at 850 MHz. No pictures, or information about the GPU's internals (such as stream processor count, TMU/ROP counts) were provided. Both retailers have put the product on pre-order. AMD is expected to release the card on April 8, 2009.