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both have same bus speed, no need to worry.<br />
the difference is in batch number or part number i guess.
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both have same bus speed, no need to worry.
the difference is in batch number or part number i guess.

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Hynix HMT451S6AFR8A-PB 4GB PC3-12800 11 - 13 -B4 1600 Mhz is made in chaina.....Hynix HMT451S6AFR8A-PB 4GB PC3-12800 11 - 12 -B4 1600 Mhz made in korea
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Hynix HMT451S6AFR8A-PB 4GB PC3-12800 11 - 13 -B4 1600 Mhz is made in chaina.....Hynix HMT451S6AFR8A-PB 4GB PC3-12800 11 - 12 -B4 1600 Mhz made in korea

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I want to buy a ram..my existing ram is &nbsp;Hynix HMT451S6AFR8A-PB 4GB PC3-12800 11 - 13 -B4 1600 Mhz....but i odered &nbsp;Hynix HMT451S6AFR8A-PB 4GB PC3-12800 11- 12- B4 1600 Mhz.......i donot understand the difference between them??when my installed memory and ordered memory &nbsp;is a little bit different from each other......should i go for ordered memory??is it suitable or harmful for my laptop ???????????????help me
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I want to buy a ram..my existing ram is  Hynix HMT451S6AFR8A-PB 4GB PC3-12800 11 - 13 -B4 1600 Mhz....but i odered  Hynix HMT451S6AFR8A-PB 4GB PC3-12800 11- 12- B4 1600 Mhz.......i donot understand the difference between them??when my installed memory and ordered memory  is a little bit different from each other......should i go for ordered memory??is it suitable or harmful for my laptop ???????????????help me

RAM PROBLEM

Hardware includes cell phones and other digital living devices, tablets, computers, servers, peripherals and components, printers and scanners, gaming consoles, networking hardware such as routers, hubs, switches and modems, storage devices and security equipment such as firewalls and other appliances.