1. This forum section is a read-only archive which contains old newsgroup posts. If you wish to post a query, please do so in one of our main forum sections (here). This way you will get a faster, better response from the members on Motherboard Point.

High-performance SLI or dual-GPU graphics - beware Intel's dual-core CPU power consumption

Discussion in 'ATI' started by John Lewis, May 10, 2005.

  1. John Lewis

    John Lewis Guest

    For those intending to build the ultimate graphics PCIe desktop system
    ---either 4-head dual-graphics-card, or SLI ( with dual 6800GT, say )
    or Ati's proposed dual-GPU system --- and also wish to use a dual-core
    CPU, please be very frightened indeed of the power-consumption (and
    consequent heat-removal needs) of the upcoming generation of Intel
    dual-core CPUs ( 840 and Pentium D ), based on their 90nm technology.
    Unless you wish to heavily underclock the processor.... :-( :-( :-(

    See the following article:-


    especially the last 2 pages : Power Consumption Test, Conclusion.

    Personally, I would much prefer to reserve the available core power
    (+12V) for video card GPU(s) and/or current/future peripherals than
    waste it on an inefficient dual-core CPU+Northbridge with no apparent
    redeeming qualities. Seems as if AMD64 X2 may be the ONLY near-term
    choice for the highest-end desktop 3D graphics/gamers desiring
    dual-core CPU capability. Otherwise, heat-pipe/ water-cooling of the
    (Intel) dual-core CPU to avoid a concentrated furnace within the case
    heating up everything including the nearest video-card, or a bunch of
    turbine(sounding) fans cooling the CPU/ Northbridge directly to the
    outside, plus a really hefty power-supply.

    Also, please remember that the dual-core Intel CPUs have a pin-out
    change on LGA775 requiring a brand-new LGA775 motherboard, while the
    dual-core AMD just requires a BIOS update of existing 939-pin
    motherboards. By the way, any motherboard capable of taking the
    current AMD64 Rev. D 4000+ ( 130nm, Clawhammer) should readily handle
    the power requirements of even the AMD 64 X2 4800+ ( 90nm process),
    which runs at exactly the same clock speed as the current 4000+ !

    John Lewis
    John Lewis, May 10, 2005
    1. Advertisements

  2. John Lewis

    rms Guest

    rms, May 10, 2005
    1. Advertisements

  3. John Lewis

    First of One Guest

    A 600 W Enermax ought to do it, I think.

    BTW, if you want to see scary power consumption, check out one of the
    Prometeia (sp?) phase-change cooler reviews at Tomshardware. I think it was
    the one where they made a video of a 4+ GHz P4. The voltage was cranked up
    so high, some capacitors started shifting as the solder softened under
    First of One, May 10, 2005
  4. John Lewis

    John Lewis Guest

    Indeed, for the A64 2X 4800+ together with a pair of 6800 Ultras.
    However, the +12V from the 701-SLI Enermax might have marginal reserve
    power to cater for a Intel 840 instead of the 4800+. If I recall
    correctly, the 701AX limit on each of the two +12V supplies is 18amps;
    remember that peripherals such as DVD burners and hard-disks
    all need a chunk of +12 too......

    John Lewis
    John Lewis, May 10, 2005
  5. John Lewis

    McGrandpa Guest

    There have been two times in the last 20 years when it became incredibly
    obvious it is better to use AMD over anyone else. That just became
    three times with no reservation.
    McG. <lookin to see what's in his savings account...>
    McGrandpa, May 10, 2005
  6. John Lewis

    Les Steel Guest

    In that case it might be worth changing your PC case to something like the
    Coolermaster stacker with its support for 2 PSUs. Use 2 identicle PSUs and
    let each feed 1 SLI card possibly to keep the juice clean?
    Les Steel, May 10, 2005
  7. John Lewis

    Rick Guest

    Your conclusion is premature. The review site in question
    is notorious for giving horribly biased nods to whoever is
    providing better free product and/or lunches at any given
    point in time. This preview is a perfect example.

    Note how they used a cruddy nForce chipset for the Intel
    test bench. Ok for games maybe, but cruddy for I/O and
    just about everything else. The fact is, we won't know
    what the Pentium D's advantage will be until it's tested on
    an appropriate platform.
    Rick, May 10, 2005
  8. John Lewis

    Folk Guest

    I agree that Tom's Hardware is a bunch of low-lifes, but reviewers
    around the globe are coming to the same conclusions. For the best in
    unbiased reviews, I recommend the Tech Report, and their review of the
    X2 comes to the same conclusions as everyone else.

    That review uses an Intel chipset (955XE), but it doesn't make any
    difference... AMD is still the superior product.

    Intel just glued two cores onto the same die and has them
    communicating through a very inefficient common bus. I expect that
    will change in the next couple of years, but for right now AMD has the
    superior dual core solution. Better power consumption, better
    single-threaded performance and now superior dual core performance.
    The choice is clear.
    Folk, May 10, 2005
  9. John Lewis

    John Lewis Guest


    BOTH Anandtech and Tom's Hardware............

    John Lewis
    Intel nForce4.... the brand new one.....
    really.... ??? SATA2 support , Gigabit Ethernet...........
    You obviously are not well informed.........and very prejudiced.

    I have been a totally faithful Intel adherent up to now.
    However, I am contemplating building a dual-core desktop system
    in about 6 months time and all of the technical analysis so far
    point to AMD being by far the best choice. I may have to pay
    a little more for the CPU, but the system flexibility and
    heat-management are winners for me.

    ( BTW, I build PC systems and make all of my buying decisions
    on sound technical information, not emotion. Comes from my
    training as a professional electronics engineer. )

    John Lewis
    John Lewis, May 10, 2005
  10. John Lewis

    John Lewis Guest

    I won't need to if I don't require the extra 80-100 watts demanded by
    the Intel dual-core+Northbridge. No problem using the Enermax
    701AX-SLI with AMD duals. Remember that the AMD dual-core processors
    have an integrated memory controller and do not require a Northbridge
    at all.

    The current Intel dual-core "solution" is a hot-house kludge. Hence
    the reason why they are scrambling for a new dual-core/multiple-core
    CPU/system architecture expected some time in 2006, probably
    synchronous with the move to the 65nm process. Meanwhile, as with the
    Prescott fiascos, the Intel marketing machine will be working overtime
    smoothing the cracks, while the Intel production machine will churn
    out their current-generation dual-core processors at near-fire-sale
    prices just to keep AMD at bay. Pity AMD is production-capacity
    limited. If they had anywhere near Intel's production capacity with
    the introduction of desktop dual-core, AMD would likely grab the
    lion's share of the desktop-CPU market.

    John Lewis
    John Lewis, May 10, 2005
  11. John Lewis

    John Lewis Guest

    Sorry, I just quoted Tom's as one of the many that I looked at...
    Yes !

    and Anandtech...which also frequently includes detailed and
    excellently-written tutorials on new technology.......... ?

    John Lewis
    John Lewis, May 10, 2005
  12. John Lewis

    First of One Guest

    The retail CPU market, maybe. Dell is still keeping Intel-only. Dell still
    sells more PCs than anyone else...
    First of One, May 11, 2005
  13. John Lewis

    John Lewis Guest

    Thoughts about Dell and dual-core also occurred to me as I was writing
    my initial posting. I suspect that customer and internal pressure
    on Dell to expand into AMD dual-core offerings would be pretty high if
    AMD had the production-capacity to satisfy Dell's volume demands near
    Intel's price-points.. Maybe it is good for the rest of us that Dell
    is an dyed-in-the-wool Intel-only house, and (hopefully) remains so at
    least through the early ramp-up of dual-core.

    However, I suspect that Gateway and HP will seize on the excellence
    of the AMD dual-core solution, and use it both in their marketing and
    in shipped product to make some inroads into Dell's desktop dominance.

    John Lewis
    John Lewis, May 11, 2005
  14. The big sticking point will be pricing. Unless they can give a better
    price than Intel a lot of people will not see a reason to change to AMD.
    Intel has the ability to quickly create a line of Celeron style dual
    processors for far less than any of the AMD offerings. Most people will
    hesitate to spend $500 to $1,000 for a new CPU, but might spend $200 to
    $300 for the latest Intel offering.
    ExtremeTech has a good article comparing the Intel and AMD offerings.
    Michael W. Ryder, May 11, 2005
  15. John Lewis

    Codex Guest

    Since when has Intel cpu's cost less than AMD cpu's? AMD make Celeron
    like cpu's too, they are called Sempron. You've got it all backwards.
    Intel is the company that overcharges on their cpu's.
    Codex, May 11, 2005
  16. John Lewis

    shawn Guest

    I have always bought AMD. I dont see what all the hype is about intel. Why
    pay more for a cpu when a cheaper one will do the job just as well?
    Yeah intel overcharges because i guess people think that you have to pay
    more to get more?

    GA 7N400 pro 2 MB, 1gb pc3200, AMD 2.5ghz 333fsb, gigabyte 6600GT, Raptor
    36.4gb HD = plays all the games I want. (not the best system but plays all
    the games I want)
    shawn, May 11, 2005
  17. John Lewis

    Xocyll Guest

    (John Lewis) looked up from reading the entrails of
    the porn spammer to utter "The Augury is good, the signs say:

    Why am I suddenly thinking of a spoof Dell ad?

    Guy 1: Dude, you got a Dell!
    Guy 2: Yeah, now I don't need a space heater anymore.

    Xocyll, May 11, 2005
  18. John Lewis

    Xocyll Guest

    The downside here is AMD isn't pricing the new Dual-cores under Intel's
    prices, they're price matching according to the articles referenced.

    Xocyll, May 11, 2005
  19. John Lewis

    John Lewis Guest

    Great, apply for a job at Gateway....


    John Lewis
    John Lewis, May 11, 2005
  20. John Lewis

    McGrandpa Guest

    I can't wait to need to upgrade. From the performance charts I've
    seen, the A64 fairly smokes my P4 3.0E. Any A64. Definitely worth a
    McGrandpa, May 11, 2005
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.