Samsung has started mass production of new 50nm GDDR5 memory chip that support memory clock speed of up to 7GHz and provides peak bandwidth of 448GB/s. Samsung says that by using the new 50nm process technology they have been able to increase clock speed while cutting down the power requirement for the new memory.
The new GDDR5 chips can reach peak bandwidth of 448GB/s at 7GHz memory clock speed using the 512-bit memory bus interface. The 50nm GDDR5 memory uses 20 percent less power than GDDR4 memory, as it requires just 1.35v compared to 1.8v required by GDDR4 to function. Samsung expects that many new graphics cards will start using GDDR5 memory in coming months. They will ship GDDR5 chips in 32Mb x32 and also 64Mb x16 configurations (for 128MB capacity on single chip).