4 Replies Latest reply on Mar 9, 2011 11:57 AM by Crist OC/PC

    Question CPU speed VS RAM speed

    inaksi prod Level 1

      I am tweaking my new worstation.

      I have an Asus p6t ws professional. I7 960

      24 G DDR3 tripple channel ram (Patriot Level 7 Viper II)


      I am new to overclocking and I up to now I don't know how to solve this propblem.

      If I overclock the CPU by putting the BCLK frenquency to 160, with default multiplier at 25, I clock 4.07

      But, when I check the speed of my RAM with CPU-Z, I get a clock of 490 (!!!) so time two 980 (not even the 533 x2 to 1066)


      If I put my bios to XMP mode I get my ram to 1600, but my cpu is about 3.4 (close to normal 3.2)


      How can I OC to 4.0 with 24 G RAM at 1600?

      The mother board manual say it acccept 1600 RAM but (OC) And THEY SAY THAT iNTEL SPECIFICATION, IN xmp mode, DDR3-1600 are supported for one DIMM per channel only (does that mean I cn only put 16 gig in channel A,B and C If I want 1600 OR 24G butr at a lower clock around 1066?


      IF I am stucked in making choices and can't have it all (CPU 4.0 and 24D RAM-1600), WICH IS THE MOST IMPORTANT: CPU SPEED OR RAM SPEED?


      I mostly edit P2 and wil be editing red and filmstock transfered.

        • 1. Re: Question CPU speed VS RAM speed
          Harm Millaard Level 7

          If you have Speedstep enabled, CPU-Z reports your BCLK setting and the current multiplier.


          Start reading here: Adobe Forums: Overclocking the i7, a beginners guide

          • 2. Re: Question CPU speed VS RAM speed
            JEShort01 Level 4

            Using a Gigabyte MB and cooling with water my i7-950 is rock stable at 4.3 with 24GB of 1600 G Skill RAM running at 1624; I have CPU turbo disabled and RAM XMP enabled and running at 1.5 volts.


            Based on my clocks (BCLK 203, CPU 21, turbo off, QPI 36, MEM 8, and Uncore 16), I would suggest trying the following to reach 4.0 with your 1600 rated RAM:

            BCLK 190

            CPU 21

            turbo off

            QPI 36

            MEM 8

            Uncore 16


            If that is not stable for your Asus, Try lowering BCLK until go get something that is. These settings would put your RAM at 1520 which would certainly be close to their maximum potential.


            OC'ing can be time consuming; if this "formula" does not work for your system, then you really do need to go with the tried and true methodical approach.


            Regarding which is more important for PPro I would say CPU speed is much more significant than RAM speed based on runs that  making with Harm and Bill's ever so useful PPBM5 benchmark along my journey.


            On another note, Cristobal on this forum informed me about "INTELBURN TEST" (Google it), which was a more rigerous torture test for stability than the ones that most people use (memtest, 3DMark, wPrime, etc.).


            Good luck and do report back what works best for you in the end; it would be nice to report how your drives are set up too along with your PPBM5 results as well.



            • 3. Re: Question CPU speed VS RAM speed
              Crist OC/PC

              The reason why you get your ram @ 980 is because you have to change the multiplier of the ram.


              If you block is at 160 and you cpu multi is @ 25 you get 4ghz

              The same whit the ram: your block is @ 160 and ram multi is @ 6: 160x6= 960mhz

                                                                               if you ram multi=8: ram speed=1280mhz

                                                                               if you ram multi=10: ram speed=1600mhz etc..



              You have to make shure the latency of the ram  and the voltage are ok.




              PD. Read the O.C. Guide harm made that will helyou to understand a bit more about O.C.

              • 4. Re: Question CPU speed VS RAM speed
                Crist OC/PC Level 2

                "IF I am stucked in making choices and can't have it all (CPU 4.0 and 24D RAM-1600), WICH IS THE MOST IMPORTANT: CPU SPEED OR RAM SPEED?"


                CPU SPEED. But as I just wrote you, you only have to change the RAM multiplier to 10 to get the 1600hz.