so games aren't really running as good as I feel they should with my setup, and I think it is my ram that is slowing me down...my current ram setup is 1gb stick of ddr2 533 and 1gb stick of ddr2 800. My motherboard supports dual channel, but that doesnt work with two different speeds of ram. CPU-Z says my dram frequency is 333.3. So my question is, how much of an increase in performance would I see if i bought another identical stick of ddr2 800 to replace the 533 so it would be faster and they would both be the same and be able to run in dual channel?
Well I am clueless to what could be causing the lag then...changing graphics settings or resolution does nothing. I open task manager then played TF2 and waited till i got in a big battle and my fps dropped to 28 then minimized and one core was running at 100% but the other was only around 50% and there was onle 1.2gb ram being used.
If you want to see FPS improvements, you'll have to OC your rig. Generally, the lowest accepted speed amongst the enthusiasts is 3.0GHz. But to address the actual concern, using a matched pair of RAM to enable Dual Channel will offer slight gains, but not much.
Dual/Triple Channel architecture was designed with the intent to reduce the bottleneck that happens when the FSB of your CPU is greater than the speed of memory. In short, more channels equal more data transfer.
Something to consider...
Rules to Enable Dual Channel Mode
To achieve Dual Channel mode, the following conditions must be met:
Matched DIMM configuration in each channel
Same Density (128MB, 256MB, 512MB, etc.)
Matched in both Channel A and Channel B memory channels
Populate symmetrical memory slots (Slot 0 or Slot 1)
Configurations that do not match the above conditions will revert to Single Channel mode.
The following conditions do not need to be met:
Same timing specifications
Same DDR speed
Memory channel speed is determined by the slowest DIMM module populated in the system.
*This really depends on your motherboard. Some manufacturers use a color
-coded system (meaning use the same colors) and some require that you use the symmetrical approach (meaning same slot on both channels).
Aside from meeting the criteria I posted earlier, the RAM sticks themselves have be made for Dual Channel. Also, tell us what motherboard you're using. Being unable to change other properties in your BIOS seems odd.