1 X4GB means there are 1 pieces ram ,each ram is 4GB, total 4GB

2 X4GB means there are 2 pieces ram ,each ram is 4GB, total 8GB

2 X8GB means there are 2 pieces ram ,each ram is 8GB, total 16GB

This memory is fully compatible memory. It can be used on AMD, Intel ordinary desktop motherboards. Can also be used for server motherboards such as X79 X58. Two different types of memory generally cannot be used on the same motherboard

1. For example, G41, P41, N68, P55 and 775 interface motherboards cannot use any 8GB memory model of this link

2. For example, H61, H55, G61 and 1155 1156 interface motherboards cannot use the 8GB memory model of 1RX8 (single-sided 8 chips), they can use the 8GB memory model of 2RX8 (double-sided, 8 chips per side, total 16 chips).

3.The reason is that some motherboards cannot read some chips with too large a capacity. For example, an 8GB single-sided memory, a total of 8 chips, each chip contains 1GB capacity, some older motherboards (such as H55) cannot read it. But, an 8GB two-sides memory which is total 16 chips, each chip is 512MB can be read.

4.Regarding the memory frequency was originally 1600mhz, but the memory you received can only be read at 1333mhz. Most of the time, it is not a memory problem, but the motherboard and processor are not strong enough to read so much memory. For example, the maximum supported frequency of a motherboard or processor is 1333mhz, even if the memory with a higher frequency is installed, this motherboard can only read 1333mhz

5. If you are not sure about the computer model, you can install CPU-Z to detect the computer's motherboard and processor model, then take a screenshot and leave me a message. I will recommend the most suitable memory.

One year Warranty

New brand with box

Pass the comprehensive test before leaving the factory, the quality is stable