ASUS P5W DH Delux Q6700 and what DDR2?

Hi --

I want to upgrade my ASUS P5W DH Delux. I have read many threads about problems with 45nm dual and quad core processors on this board!

I see I can get a 65nm Kentsfield Q6700 for under $200 at TigerDirect (ref.). So I will go with that unless anyone has better CPU choice for this board.

Question: I have 3GB of DDR2-533 PC4200 DDR2 in the board now. Is that the right DDR2 to keep for the new CPU of should I upgrade to get PC6400?

I am not doing overclocking.

Thank you!
7 answers Last reply
More about asus delux q6700 ddr2
  1. Performance wise DDR2-533 is not ideal, but it does the job. Since you are using 3 modules, it runs in single instead of dual channel.

    I'd suggest one of these G.Skill kits:


    By default they will be detected at the JEDEC standard of 5-5-5-15 timings at 1.8V.
  2. Hi --

    Thanks for your reply.

    I am currently using PC4200 3GB as 4 modules: 1GB, 1GB, 512Mb, 512MB. When I go to PC6400 would it be best to have 2x2GB or 4x1GB?

    Thank you!
  3. 2 x 2GB is better.
  4. Correct. The P5W DH Deluxe is FSB limited with a Dual Core processor to ~ 425 Mhz at best, on a good day, if all the planets are aligned, so 4 modules will further limit the memory controller on the 975X northbridge chipset due to the additional current required to communicate with 4 slots. The Q6700 is the best Quad for that board, due to the 10x multiplier, which allows the FSB to run at only 360 Mhz with a very nice overclock of 3.6 Ghz. On the other hand, the Q6600 will never reach 3.6 Ghz due to the 9x multiplier, which requires 400 Mhz FSB.

    Also, northbridge temperatures can be reduced and FSB overclockability and stability can be enhanced by removing the very shiny, but airflow-limiting cover from the northbridge heat sinc, and attaching a 40mm fan - - to the heat sinc. Simply usee the fan and screws from the kit, which will attach quite nicely to the notrhbridge heat sinc.

    Comp :sol:
  5. hmmmm odd ideas and replys here

    DDR2-533 in dual channel gives a Q6700 FULL memory bandwidth and doesnt require any higher spec memory although for overclocking and what not it wouldnt harm to get higher spec'd ram and DDR2 is so cheap anyhow

    your best bet is 2x2gb 800mhz DDR2 to get a total of 4gb dual channel etc

    if your overclocking a Q6xxx you will see a limit of around ~3.4ghz on air depending on sample, and you can simply raise the FSB from 266 (1066) to 333 (1333) to get 3.33ghz and should be fine on stock cooling, or even if you lower the multiplier from 10 to 9 to get 3ghz, and stick below 1.45v if anything (shouldnt need any extra v's anyhow)

    as for 45nm cpus on older motherboards - there not designed to run on there so yeah no guarantees etc, you best bet for a simple upgrade is an overclocked quad

    what cpu do you currently have?
  6. >what cpu do you currently have?
    I currently have Pentium D 820 with PC4200 (2x1GB + 2x512MB).

    Based on the above thread I just ordered:
    Q6700, a cooling fan, and the G.SKILL HK 4GB (2 x 2GB) DDR2 800 (PC2 6400).

    I plan to run as is with no overclocking.

    I also bough the 40mm fan CompuTronix mentioned in the thread. It was only $7 and I do see higher temps on that board now so it seems like a good idea.

    Also got some Arctic Silver 5 Thermal Compound.

    The whole lot cost $310 with shipping so that seems nice for this upgrade.

    Thanks for all the help and info!
  7. That CPU cooler is nearly identical to Intel's very poor stock cooler, which is totally inadequate for an overclocked Q6700. A much better choice would be the Xigmatek HDT-S1283:

    Also purchase the Retention Bracket:

    Don't forget to flash your BIOS to the latest update.
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