memory - Will I perceive speed improvement with more RAM?

I have a Toshiba Satellite L855-S5240.

The current specs are:

Intel® Core™ i5-2450M Processor2.5 GHz, (3.1 GHz with Turbo Boost
Technology 2.0), 3MB L3 Cache

Mobile Intel® HM76 Express Chipset

Mobile Intel®HD graphics with shared graphics memory

Configured with 6GB DDR3 1333MHz (max 16GB) 2 main memory slots. Both
memory slots occupied

I have ordered a 8GB stick and intend to replace the current 2GB stick.. bringing me to 12GB total.

This is the stick: Amazon Link

Will I notice a benefit? Particularly working with virtual machines and overall system performance?

Answer

Upgrading RAM to improve performance?

Ultimately this comes down to what you are trying to use your Laptop for.

You have mentioned that you are working with virtual machines, so we'll use that as a starting point. You currently have 6GB RAM.

What will upgrading my RAM allow you to do?

1. Allocate more memory to current VM's, requiring less writes to HDD


2. Create more VM's, as there is more memory to allocate


3. Allow the host (Your Laptop's OS) to keep more memory free, again requiring less writes to HDD

So, why is writing to HDD bad?

In short, it's not ... It's just slower (Debatable, but not with a laptop)

So what happens if you're still experiencing slow performance after the upgrade?

This will most likely be caused by your processor. You currently have an Intel Dual core processor, which with hyper-threading creates 4 virtual cores.

This means that you would realistically only be able to run 3 virtual machines simultaneously with relative ease.

On a last note, and possibly the most overlooked performance issue with laptops, is air flow. To put this into perspective, I can't play 'Heros of the storm' without performance lag. Once I put it on a laptop cooling base, it runs perfectly.