Kingston HyperX: What is "second revision"?

[IlyaK]

Hello.

I read my MB manual and it says "KHX1333C7D3K2" is recommended memory.
But I was able to find only "KHX1333C7AD3K2".

Difference is letter "A".

Kingston decoder told me "A" means "second revision".

What is "2nd revision"? Some bugs were fixed?

Can I install it to my MB?

I know some people do not really pay attention on RAM recommendations in mother board manual, but I want my PC to be configured as "right" as possible.

By the way, there are several other recommended memories, but all of them have 9 CAS latency while memory I chose has 7.
Is 7 really much better than 9 on 1333 freq?

And also Kingston has ValueRam and HyperX. I chose HyperX, but what is the real difference?

 

[miimario221]

Im not much into RAM but I can tell you that the HyperX have a increased performance and duration and the ValueRam are economic for basic things.
2nd revision is a background test of the RAM.
Ill look further into the CAS Latency

Good Luck!

 

[TenPc]

The HyperX has a heat sink on the ram and the ValueRam has no heat sink.

The KHX1333C7D3K2 is 1.7 volts where as the KHX1333C7AD3K2 is 1.5 volts