Ram bottlenecking performance in games?

[arcticking]

Is my ram bottlenecking performance in my games? (2006-2010)

Here is my low budget gaming rig:

Powercolor ATI HD 4670 1GB GDDR3
1x1GB DDR2-667, 1x2GB DDR2-667 RAM (Dual Channeled)
AMD Phenom II X4 955 Black Edition
160GB IDE Hard Drive (Unsure of RPM & Cache)
Gigabyte MA770-UD3 AM2+/AM3 Motherboard
700W OCZ ModXStream Modular Power Supply
Screen Resolution: 1280x1024

So, I do have 3GB of DDR2-667 ram in total.

I already have planned to upgrade my GPU, RAM, and Hard Drive:
Sapphire ATI Radeon HD 5770 (w/ Vapour-X Technology)
4GB (2x2GB) G-Skill PC-8500 DDR2-1066 RAM
500GB Western Digital 32MB Cache 7200 RPM SATA Hard Drive

The link to these products that I plan on obtaining:
http://ncix.com/products/?sku=48136&vpn=11163-00-20R&manufacture=SAPPHIRE

http://ncix.com/products/index.php?sku=28306&vpn=F2-8500CL5D-4GBPK&manufacture=G.Skill

http://ncix.com/products/index.php?sku=33883&vpn=WD5001AALS&manufacture=Western%20Digital%20WD

Please tell me if I am making a good decision in those products.
(Especially the RAM upgrade)

 

[saaiello]

The 4670 is holding you back the most and as for the ram 1066 ddr2 ram is just 800mhz ram overclocked so i would take that into consideration when buying your ram.

I would go with these instead

http://ncix.com/products/index.php?sku=47683&vpn=996587B&manufacture=MUSHKIN

Mushkin Blackline Frostbyte PC2-6400 4GB 2X2GB DDR2-800 CL5-4-4-12

You will see better performance with the tighter timeing also these run at 1.8 volts i would stay away from anything running ove 2 vols as they will run super hot and gennerally don tlast as long. You will also have no problem getting these up to 1000 mhz you will just have to loosen the timeing up a tad prob 5-5-5-18 which is about the same as the G skill but will run alot cooler and last longer and give the same performance.

 

[jitpublisher]

The RAM upgrade will help a little, maybe enough to barely notice any difference.
Just get the video card first and see what happens. That is going to make a world of difference.

 

[arcticking]

The 4670 is holding you back the most and as for the ram 1066 ddr2 ram is just 800mhz ram overclocked so i would take that into consideration when buying your ram.

I would go with these instead

http://ncix.com/products/index.php?sku=47683&vpn=996587B&manufacture=MUSHKIN

Mushkin Blackline Frostbyte PC2-6400 4GB 2X2GB DDR2-800 CL5-4-4-12

You will see better performance with the tighter timeing also these run at 1.8 volts i would stay away from anything running ove 2 vols as they will run super hot and gennerally don tlast as long. You will also have no problem getting these up to 1000 mhz you will just have to loosen the timeing up a tad prob 5-5-5-18 which is about the same as the G skill but will run alot cooler and last longer and give the same performance.

How good is the manufactuer Mushkin? Are they high-quality?

 

[arcticking]

nevermind.. I prefer G-Skill.