Samsung clocks GDDR4 at 4 GHz

Samsung has presented new GDDR4 memory chips at the ISSCC event. The new chips are clocked at 4 GHz, more than 40% faster than the original frequencies that Samsung was aiming at. The 512 Mbit (64 MB) chips are manufactured in a 80 nm proces and require a voltage between 1.4 and 2.1 Volt. Samsung used 2.0 Volt to run the chips stable at 4.0 Ghz.

GDDR4 at 4 GHz delivers a bandwidth of 16 GB/s. With 256 bit memory controllers on video cards the new memory will result in an astounding bandwith of 128 GB/s. Originally GDDR4 was planned to scale up to 2.8 GHz in 2007, while GDDR5 was planned to go beyond 3.5 GHz. With Samsung new chips it seems that the life cycle of GDDR4 will be much longer.

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