Council for RAM on Asus P5K

[Baazigar]

I have the PC with config as below and I would like to increase the ram. Do you think I should add some more ram modules? Take directly a set 2 x 2 1066MHz (4GB) or a 2x2 to 800MHz and adds them to those who already have flights to 6GB? What interests me is a good compromise between performance and amount of RAM (I'm on Windows 7 Ultimate 64bit) for 3D, After Effects, but also gaming.

There are known issues with the P5K RAM? That is, if I take the lanes are identical to those signed (only online but also find a good price that is 2x2 at around 3k) you can mix easily with other ram?

But I will observe greater improvement with 6GB of RAM at 800MHz or 1066MHz with 4GB though?

Config:

Intel Core 2 Duo E6750 (2666Mhz) 4MB L2 boxed FSB1333, Asus P5K, Corsair TWIN2X kit 2x1GB PC6400 800Mhz-444 XMS2 EPP, Nvidia 8600GT 256MB GDDR3 DVI + HDMI PoV PCIE, Western Digital 500GB SATAII 7200rpm 16MB, Maxtor 200GB IDE 7200rpm, LC Power 550W SATA silent giant rev.2 14cm fan green power, Pioneer DVR-212D-BK Black SATA, Enermax Chakra con monster fan 25cm. Samsung Syncmaster 931bw.

[Terrextre]

Hello, I think the better is the RAM the faster is your computer. If you get 6 GB RAM then you do not need anything but still 4 is enough. I say this because I had spoken to a friend who had even at risk of slowing down. In my case, I have 3 GB at 667 and I am fine.

[Baazigar]

Hello, do you think that 6 GB of RAM is enough for after effects? I mean I have never used it but I want to know if I could get it and I think you are better than me who knows this concept very well.

[Terrextre]

I do not understand a lot in hardware and that is why I am here to know things. But I told you because I had a friend who knows a lot more than me and he told me that something better will be helpful providing more speed to the user.

[Nutty]

The system will take time and frequency reference. The RAM is less been so. Needless to 1066 ram then take them if you live with your xms.

Moreover, if a different brand, look for some good voltage stability of ram that would be worth for you to take. If not mistaken, your cl4 want to know about 2.1-2.2 volts.