Does the second stick have to be from the same company?

It's better to keep the same memory on each channel.
You can mix on different channels.

You can mix on the same channel but the result will be the memory running at the lowest speed of the two.

You didnt read my question at all.. :roll:

The speed will be the same. The company wont.
Is that OK or must i have two sticks of the same maker?
 
He did read your question (or I misread it as well). most modern motherboards come with 4 slots, 2 slots per channel. for best results, keep the two sticks channel isolated to keep potential problems a minimum. while the memory sticks may talk at the same speed, and talk the same to the memory controller, they might not like talking to each other. 😀 even if they are the same speed, the latencies might not match either, and you will be going with the slowest of them.

For best results depending on your system, if you have the 2 memory channels, get a seocnd stick from each company that matches. you will get better performance and better compatability.

If not, then it still might work, but it isnt 100% that you wont have problems...
 
are the timings the same too? thats a speed too.....

it should work on most new chipsets.....but there is no way to promise it....as you are asking it to treat 2 different stick as identical....

no one can give a definitive answer to that....
 
Alright. Sorry if I was harsh earlier.. I just hate it when people answer a question they have not read.

How do I tell what the latency of the exsisting memory stick is?