HIS today unveiled low-profile graphics cards based on the Radeon HD 5550 and Radeon HD 5570 that make use of GDDR5 memory that doubles the memory bandwidth available to the GPU. The cards come in both 512 MB and 1 GB variants. Both have memory operating at 1000 MHz (4 GHz effective). Based on the 40 nm Redwood core, the HD 5550 card has 320 stream processors, is DirectX 11 compliant, and has a 128-bit wide memory interface that normally holds GDDR3 or DDR2 memory for the HD 5500 series SKUs. HIS went beyond the specs, using GDDR5 (which the GPU supports in its HD 5600 series SKUs). The HD 5570 has 400 stream processors, with the GPU operating at 650 MHz, while on the HD 5550, it runs at 550 MHz. The low-profile cards are also silent, with a passive cooler that occupies a single expansion slot doing the job of cooling the memory and GPU. The HD 5550 512 MB GDDR5 card goes for 89 EUR, while the 1 GB variant at 99 EUR. Pricing of the HD 5570 cards are yet to be known.