4GB Phone Memory Now A Possibility – LPDDR4

Posted Dec 30, 2013
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Samsung has developed the industry’s first LPDDR4 memory chip of 8Gb capacity. LPDDR4 is a low powered version of DDR4 ( Double Data Rate Four). Even now 3GB of memory is not very uncommon in smartphone, Galaxy Note 3 anyone?

Industry’s First 8Gb LPDDR4 Mobile DRAM

If u don’t know, Gigabits is the norm for measuring chip capacity, but in devices such as a smartphone, memory is measured in Gigabytes. 1 byte = 8 bits so four 8 Gb LPDDR4 chips will enable mobile manufacturers to install this magnanimous amount of RAM in a phone. ( Not that its actually very necessary).

LPDDR4

Technically the new chips will provide 50% better performance over the existing LPDDR3 solutions. While doing this, they will also consume 40% less power. According to Samsung, the new  LPDDR4 chips are manufactured using 20nm fabrication technology and this yields one Gigabyte on a single die, the highest in the industry.

Normally you would trade off performance for power consumption, or vice versa. This time around because of the jump from DDR3 to DDR4 the performance is also doubled and the operating voltage is also reduced as per the the cycle, just like in desktop DRAM.

 

DRAM Type Operating Voltage
DDR 2.5
DDR2 1.8
DDR3 1.5
DDR4 1.2

 

It is only logical for Samsung to develop 4GB memory chips. With the Exynos 5 pitted to release soon and other 64 bit enabled chipsets inbound, Samsung will fulfill the growing demand of RAM from smartphone manufacturers( Except Apple).

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