Should I upgrade with 1-2Gb or 2X1Gb

Adding a single stick of RAM will force your system to operate in single channel mode vs. dual channel mode. Not a huge difference in performance, but such a config with have a small negative impact. Install in pairs is the best way to go, all matching is preferable.

Good luck!

If you already have a 2x1Gb setup, I'd just go with another 2x1Gb setup. It'll save you money anyhow.

Thanks!
Wont I also have a negative impact if im running 2 sticks with heatsink with 2 sticks with no heatsink.

If the chips got that hot, the manufacturer would have put heat sinks on them. As long as the voltage and speed settings are similar it should work.

Most memory heatsinks are actually for show more than for actual cooling. You should be fine either way.

Kingston Value Ram here I come  

What if i get a single 2Gb now and a similar one later.
Will I still get dual channel if the sizes are different?

Yes, but you can'tt have dual channel with an odd number of memory sticks.

It is more likely to not work as you intend. Mixing brands in a single pair is not a good idea. If you are very careful to match the memory, down to the actual chips used, for example, it can be done. I do not recommend this course of action.

http://www.newegg.com/Product/ProductList.aspx?Submit=E...
Which of these Rams should I get? Will it make a difference if i get kingston value ram or the corsair xms
I'm pairing it with 2-1gb 1.5V 9-9-9 latency Patriot

What speed (not just the 9-9-9 info) is your current Patriot memory rated for? Also, do you simply have the option (afford) to go with 2x2GB vice the 4x1GB route you are on?

If you can't go the 2x2GB route, I would go with these:

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

G.Skill makes very good memory and it should cooperate nicely with the Patriot memory you already have. Last, not to insult, but make sure you have DDR3 memory installed (and not DDR2). You can't mix DDR2 and DDR3 memory.

its I think 1333 mhz
All the sticks seem to all be the same speed
Its just the g skill says 1.5-1.65V as opposed to just 1.5

Will having a total of 6Gb be any significant better than 4Gb?
I have x64 win7
Gts 250 512mb video card
AthlonIIX3 unlocked to x4 cpu, I think its called B40
Main game I play is Battlefield Bad company 2

Not a significant difference (4GB vs. 6GB). Was really looking at you going with only 4GB (2x2GB) now and possibly to 8GB (4x2GB) later. 8GB is where many gaming rigs start these days. 6GB in the interim will be some improvement.

BTW, the memory voltage range is not an issue. It just means the memory is more flexible in that regard. You mobo will manage this for you.

If i put 2 more 1Gb sticks ill have all 4 slots full. I just cant seem to decide what memory sticks to get to avoid any sort of problems. I had some serious voltage issues when I first built this rig.
I had to manually adjust the voltages or else I would keep getting bsod

What voltage settings did you have to change? Memory or CPU? That could be a symptom of unlocking the 4th core on your CPU.

Are your current memory settings set to AUTO or default in your BIOS?

Right now the system works fine, I lowered the memory voltages down to 1.5 manually because it defaulted/ automatic was set 1.64 too high for my stick which says 1.5V on it, I know right the bios can be lame.
Anyways, I dont know what memory to upgrade now. There are single 4gb sticks for $30, and theres 2Gb Dual Channel sticks for $27.
My main uses are battlefield bad company 2, Video card is gts 250 512mb
Would there be any point to getting 6 Gb total or should i try to get another dual channel pair and hope they match.

For some reason I feel like even if I get Similar speed/voltage memory sticks it still wont work with dual channel, so might as well get a single stick for less.

This is easy. As long as you get matched pairs and install in the proper slots, you will have dual channel capabilities. ANY single stick solution will result in single channel. This performance hit is not as bad as you might think (as discussed earlier).

Get what you can afford and don't worry the details too much. As long as you aren't OCing your system heavily, you should be just fine.

Sorry to be such a nuisance but will 4Gb total be plenty to play games on a Gts 250? It seems fine with 2Gb, its just that all the $600 and up computers at the stores have 6Gb+ so it got me wondering.

4GB will be fine. x64 likes more memory, so more is better to a point. You see lots of 6GB rigs because they support tri-channel memory (Intel thing that AMD doesn't support). Really, buy what you can afford and don't sweat it too much.

Thanks! I can afford it I just want to tell myself its justified, I know its like an ocd Lol  

Will 6Gb single channel outperform 4gb dual channel?

Probably not, but the difference in most cases will be negligible.