was wondering if
OCZ Platinum 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500)
http://www.newegg.com/Product/Produc...82E16820227298

Will work okay with:
ASUS P5N-D LGA 775 NVIDIA nForce 750i SLI ATX Intel Motherboard
http://www.newegg.com/Product/Produc...82E16813131232

And if this power supply will be okay with it?
Thermaltake TR2 W0070RUC 430W ATX Power Supply 115/ 230 V
http://www.newegg.com/Product/Produc...82E16817153023

Your links don't work. For the power supply, you need to list the rest of your system and let us know if you'll be overclocking. For the memory, be sure it has a lifetime warranty; alot of memory sticks in various brands have been failing lately. I use samsung, crucial, or corsair.

Like o1die says, we need specs, and I think you need a more powerful PSU.
The TR2 has only an 18 amp 12 volt rail.

Unless you are going with a low end video card and you are not going to OC, you need a more powerful PSU.

Your PSU choice (and its price) suggests that you are on a tight budget. Well, if you are not prepared to get 650 - 700 watt PSU, forget about SLI. In that case, you do not need the nForce board. Get something like a Gigabyte P35-DS3L. Then you can take the money you save and get a better PSU and perhaps video card.

This power supply i had listed above is just one i have here, if i need to upgrade it to be able to run the system better thats fine. I found a atec, you think this one will be able to do the job?
Antec NeoPower 650 Blue 650W ATX12V / EPS12V Power Supply - Retail
http://www.newegg.com/Product/Prod [...] 6817371010

The ram is
http://www.newegg.com/Product/Prod [...] 6820227298

And with this board
http://www.newegg.com/Product/Prod [...] 6813131232

I use antec; it should work fine. Check asus website and see if any ocz is on their recommended list for your board. I'm with the previous poster on the motherboard. Unless you know you'll use the sli feature, I'd go for a p45 single video card board.