Looking to buy Memory for my Computer

I currently have 4 X 1GB DDR3 1333MHZ and my Mobo will support up to 8GB, So I was looking at 4 X 2 GB sticks. On Newegg I found DDR3 1333 (PC3 10666) for 79 bucks and also DDR 1600 (PC3 12800) for 77 bucks. My question is why is the higher memory cheaper? Which would be the better for my system. Any help would be greatly appreciated..

XPS 730 H2C
Core2 Extreme QX9650 3.0GHZ
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  1. Will my Mobo read the 4GB sticks? I am a noob on somethings.
    NormH said:
    Cheaper due to brand. Get this for 54
  2. Download cpuid it will tell u max ram supported
  3. What mobo and CPU?
  4. I think the Mobo is 775 , The CPU is a Core 2 Extreme QX9650
    Tradesman1 said:
    What mobo and CPU?
  5. then most likely its 8gb max at 2gb per stick so id get (buy 2 of this)
    or (buy 1 of these)
  6. Again it will depend on the mobo, some 775 mobos like those using the P45 chipset can use 4GB sticks, others are limited to 2GB and in some cases 1GB
  7. I bought the G-Skill 1600 DDR3 memory 4 X 2b sticks and installed them. Have had the system freeze up twice and Blue Screen once. Any ideas on what I need to check or change? All the memory sticks seem to be seated properly and the system is recognizing all 8GB's or RAM....
  8. look at max ram voltage. usually 1.5v or something like that. if the ram is higher that could cause it.
  9. Try raising the NB Voltage + 0.075
  10. RMA'd the RAM that I bought and got 4 new 2GB sticks, still freezing occasionaly and getting Blue Screen errors....
  11. Again, may need to raise the NB voltage
  12. Raised the NB Voltage as suggested and it works some better , but still Blue Screens occasionally... Not as much as before, but still enough to be annoying.. Any thing else I may can try? Someone suggested manually setting the Timing? Is this something I should try?
  13. Best answer
    NB voltage up a little higher and add + 0.05 to the DRAM voltage
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