upgrading ram a good investment for my build?

[joeylutskus]

I have an E6600 overclocked to 3.0ghz(334x9) with 2GB (1GBx2) of Mushkin DDR2 667 Ram(ram is running at 668 mhz). http://www.newegg.com/Product/Product.asp?Item=N82E16820146111
I am building a computer for my father and for building it, he said he would get me 2 sticks (1GBx2) of DDR2 800. My Mushkin ram is currently running a 1:1 divider with my overclock of the E6600. My main question is, will I see an increase in performance(ie. better overclocking, etc.) in my system by moving to DDR2 800. Will I be able to push the E6600 higher, or should I stick with my current ram? If i should upgrade, could you point me in the right direction on some good DDR2800. I am currently looking at these:
http://www.newegg.com/Product/CustratingReview.asp?Item=N82E16820227120
http://www.newegg.com/Product/Product.asp?Item=N82E16820146118
http://www.newegg.com/Product/Product.asp?Item=N82E16820150054
http://www.newegg.com/Product/Product.asp?Item=N82E16820145034.

Thanks for your help.

Joey

PS: My system specs are ASUS P5B board, E6600, Zalman CNPS9500 cooler, Mushkin 2GB (2x1GB),Gigabyte 7600 GT (NO interest in upgrading graphics, I don't game), 250 x 2 WD hard drives, ASUS DVD player, ASUS DVD Burner

 

[shata]

Well you want memory that has the tighest timings for ddr800.
For example for ddr1 you want 2-2-2-5 so you can loosen timings and up the clock speed of the memory.

 

[Anoobis]

Which P5B do you have? The Buffalo looks good on paper but requires 2.1v. I believe some of the P5Bs max out at that voltage.

 

[Doughbuy]

You would be able to see better OC'ing, but whether the rest of your system could handle it, I'm not sure (heat wise). Thing is, how high of an OC are you going for? The OC you have now already seems fairly decent, see no need to keep pushing.

Out of that list though, I would go with the Corsair, than Firsestix, than OCZ. Although you could save some money and get some G.Skill, which is pretty much equivalent to Corsair and quite a bit cheaper.

 

[joeylutskus]

I just said hell with it and decided to go with 2GB of G.Skill DDR2 800 F2-6400PHU2-2GBHZ and also decided to upgrade my graphics card, even though I don't game, but one day I might ,although I do dabble in video editing and movies. I went with the Sapphire X1900XTX 512mb graphics card to round my rig out. I had pretty good components, but I wanted to kick it up an extra notch. I've personally had great experience with NVIDIA, but I've read so many good things about this card, I had to try it out (although it was a tough decision). Do you think I made wise decisions? Thanks for your input.

Joey

PS: My board is a plain jane P5B.

 

[rwaritsdario]

Well you want memory that has the tighest timings for ddr800.

Not true. DDR2 CL4 will go to 500+Mhz CL5 @2.2v but CL5 will conk out at 510Mhz. Works the same for all DDR2.