Ram and CPU relationship, LGA775 P45

Posted on 2011-10-31
Last Modified: 2012-05-12
I have a E8400 Wolfdale chip that I want to breath new life into.

I allready have
Chip: E8400 1333 FSB

So on newegg I bought
Memory 1600 Speed:

Along with a 6gb sec SATA HDD and Controller Card and HDD (my goal to have faster R/W speeds)

My question is what setting in BIOS should I look for to speed up the 1333 FSB on the E8400 Chip? The memory is rated at 1600.

I heard you should match the FSB of Chip to the speed of the memory? Is this true? If so, the E8400 would need to be 1600 FSB. Is this right?

Thank you,



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Question by:stevef22
    LVL 4

    Expert Comment

    first of all yes you are right the bus speed should be always the same, oriented on the slowest, so your motherboard is capable of 1600, your ram is 1600 but your cpu is only capable of 1333 so your system will run at 1333 mhz except you overclock your cpu to 1600 fsb (frontsidebus).

    1. i would suggest you, i don't know your budget or for what that system is for, to buy a core i5 2500k its much better than the e8500 and cost not that much

    2. as i heard the 1600 stuff is not really neccessary, just get some 1333 and you are fine.

    3. look that your mobo has a z68 motherboard.

    so just tell us please how your budget is for the system and for what you want to use it for, maybe we can advice you with something ;)

    ps: r/w speeds not really depends on cpu or the fsb because the bottleneck is always the hdd, except you choose some SSD or some raid.
    LVL 4

    Expert Comment

    sorry for double posting but i mean 3. look that your mobo has a z68 chipset, has good performence etc.

    Author Comment

    Please read my orig post carefully, these are the components I have already purchased. I am now "stuck" with them. Great suggestion for hte i5, however I already have the components listed in the orig post. My budget has been spent.

    My question is how do I speed up the FSB of the E8400 Chip to match the memory and motherboard?

    I plan to use this PC for vid editing. Does the SATA 6GB card and the 6GBSec hard drive help?

    Thank you,
    LVL 4

    Accepted Solution

    if you want to match the speed you've to overclock the fsb from the cpu, you should be able to do it in the bios, just read the motherboard manual but really be careful!

    overclocking can damage your hardware, if you don't have enough knowledge about overclocking then just keep it as it is, usually you need a good air flow and heat transportation / cooling for overclocking and the output you get is usually not _that_ big, i think its better for you, so sad it sounds, just to leave the fsb as it is before you damage hardware and your warrenty is broken in the most cases when you overclock the hardware and because of that it fails.

    really be careful or better leave it as it is! i don't think that you can push the fsb from the cpu to 1600 of the ram...

    for overclocking you need to know which volts for cpu is right, the fsb , cooling is importand etc
    LVL 30

    Expert Comment

    I would suggest searching through and/or posting the question on

    Here is the result of just a quick search based on your board. You will want to supply the board and cpu specs.
    LVL 69

    Expert Comment

    You cannot run the E8400 at FSB 1600, unless you are very lucky to have the right part and have a good understanding of how to overclock a cpu, because that's what you will be doing.  The memory will run at the speed of the cpu, if it is fast enough, so your DDR3 1600 will run at 1333 because your motherboard will set this when it detects your cpu.  Trying to run it any faster can result in instability and crashes.

    SATA 6GB will only benefit the latest SSD's, because only they are fast enough to make use of the new interface.   Hard drives can't even make full use of the bandwidth of an SATA 1.5GB interface.  If you want faster I/O, you'll have to spend money for an SSD, or trade that drive for a 10,000 rpm WD Velociraptor.

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