Corsair DDR2 - Which version to buy - 1.8V or 2.1V - Like to overclock

So i am buying Q9550 with Asus P5Q deluxe soon and would like to go with corsair memory but i am confused, as to attatin an overclock of 3.2/3.4Ghz on Q9550, which memory will be perfect 2x2GB kit C4 OR C5 ?

C4: http://www.newegg.com/Product/Product.aspx?Item=N82E16820145194

C5: http://www.newegg.com/Product/Product.aspx?Item=N82E16820145176

Also, Can Asus p5Q Deluxe can handle 2.1V RAM without any problem and do i have to manually set the voltages if i go with C4 cersion ?

PS: I am asking this question as C4 uses much higher 2.1V and i think its not recommended... and there is a high chance of sticks getting dead/faulty soon enough...
16 answers Last reply
More about corsair ddr2 version overclock
  1. Anybody ?
  2. I'd say go for the 1.8v ram, and only bump that voltage as dictated by overclocking stability needs.
  3. To run at 2.1V, you'll have to set the voltage manually. As long as the modules are designed to run at that voltage, it won't be an issue.

    You should follow mtyermom's advice to get modules that run at 1.8V (or 1.9V).
  4. "To run at 2.1V, you'll have to set the voltage manually. As long as the modules are designed to run at that voltage, it won't be an issue"

    Well so if i buy a ram with 2.1V. at what volt it will run by default ??
  5. It should run at 1.8V with reduced timings. I am using G.Skill F2-6400CL4D-4GBPI-B (http://www.newegg.com/Product/Product.aspx?Item=N82E16820231209&Tpk=F2-6400CL4D-4GBPI-B) in mine and it works fine. It only requires 1.9V at 4-4-4-12.
  6. The MOBO defaults to 1.8v because that is the stock DDR2 specification. Any voltage beyond that which is needed for OCing, you will need to set manually.

    If you want to OC, get the 2.1v version. Your links don't work for me but if I was making recommendations, get PC8500.
  7. XMSYellowbeard said:
    The MOBO defaults to 1.8v because that is the stock DDR2 specification. Any voltage beyond that which is needed for OCing, you will need to set manually.

    If you want to OC, get the 2.1v version. Your links don't work for me but if I was making recommendations, get PC8500.


    First of all, LINKS ARE FIXED, IT'S WORKING NOW

    Second, say if i buy C4 version - that runs at 2.1V with 4-4-4 timings... Now when i install the ram, i assume it will run by default at 1.8V with 5-5-5 timings, am i right ?

    Now, if i want to run this ram (C4) at 1.8V and at 5-5-5 timings throughout and would never like to overclock is that okay and safe and would pose no problem? I am asking this as "C5" stocks are not available at the moment where i live..
  8. You are correct.
  9. More replies with respect to my last post... (Above)
  10. I have the C5 DHX 2x2 Gb in my P5Q Deluxe. Just upped the VDimm to 2.1 and entered the timings manualy in the bios. No problems.
  11. I cannot edit and just have to correct myself, C4's not C5's.

    My PC booted up and ran fine in windows with the default BIOS memory timing and voltage settings. i decided to install the OS before I changed the Dimm settings.
  12. well considering the $20 price difference i recommend the 2.1V 4-4-4-12 timing kit.
  13. I wonder why nobody can understand what i am speaking ??

    I want to run C4 memory at Default... that will be @ 5-5-5, 1.8V...
    So is this recommended & safe?
    I dont want to run at C4 as i dont want high temps at 2.1V
  14. Yes. I already answered on 12-05-2008 at 08:22:56 PM, but you keep on asking for more replies.
  15. GhislainG said:
    Yes. I already answered on 12-05-2008 at 08:22:56 PM, but you keep on asking for more replies.


    I have asked for more replies... as instead of breakingup answers, your reply was of one word "Correct".

    But, anyways thank-you... as my question is been solved, by your reply.

    :)
  16. Sorry for the confusion. I simply meant that you were correct on all counts.
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