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Thread: Memory

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    Memory

    Umm hey everyone, I'm pretty new to building computers. My first one will be in february-march or whenever i have enough. As far as the higher speed memory like PC3500 or more I can't seem to find any motherboards that support anything that fast. Of course I want it to support AMD processor as well. Any suggestions for a board that the PC4000 will work on? Maybe I don't know what I'm talking about and have been looking at it all wrong? Whatever the case, please tell me!

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    HEXUS.social member Agent's Avatar
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    You wont see any board officaly (AMD wise) support over PC3200 (200mhz) because its the fastest FSB speed of AMD CPU's. They wont rate them higher because this will be the limiting factor while staying in spec of the CPU.
    Quote Originally Posted by Saracen View Post
    And by trying to force me to like small pants, they've alienated me.

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    So does that mean if I buy a board not supporting the PC4000 I can still run it...just I have to change something?

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    The reason for having PC3500, PC4000, etc.. memory are for overclockers who like to overclock by increasing their FSB. As a result, you'll find no motherboard or CPU manufacturers support these speeds despite the fact that their products have the options to implement such memory speeds.
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    Originally posted by yuthra253
    So does that mean if I buy a board not supporting the PC4000 I can still run it...just I have to change something?
    For building AMD never use PC4000 or PC3700 RAM it's just not suited. AMD needs slower mhz RAM doing more work per cycle so it matches up with the effecient architecture of their CPUs

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    All RAM is backwards compatible. so pc4000 would work at pc3200 speeds.

    However with AMD systems there is not really any point getting above pc3200, as most branded pc3200 will hit 230fsb+.
    Prices:
    Lots of money: OCZ, corsair, mushkin
    Medium: Kingmax, Samsung
    Low end: Twinmoss, adata

    They will all go a long way, the lots of money products have long warrentys, and low timings.

    Will
    | XP1600-m | ASUS AN78X Deluxe | r9700 pro | 2x512mb pc37000 |

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    Originally posted by blockers
    All RAM is backwards compatible. so pc4000 would work at pc3200 speeds.
    Will
    Try getting pc4000 to run at pc3200 speeds with 2,2,2,5 timings, I have a cookie waiting for you if you do it

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    cat /dev/null streetster's Avatar
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    Try getting pc4000 to run at pc3200 speeds with 2,2,2,5 timings, I have a cookie waiting for you if you do it
    surely it would only be able to run at those latencies if it was manufactured to do so - so if it would do them at 500mhz it should have no trouble doing them at pc3200... the thing is (afaik) most pc3500-pc4000 is just overvolted pc3200 with reduced latencies to ensure they are stable so wouldnt be able to acheive nice tight latencies just pure speed?

    mark
    Last edited by streetster; 03-01-2004 at 07:10 PM.

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    Originally posted by streetster
    surely it would only be able to run at those latencies if it was manufactured to do so - so if it would do them at 500mhz it should have no trouble doing them at pc3200... the thing is (afaik) most pc3500-pc4000 is just overvolted pc3200 with reduced latencies to ensure they are stable so wouldnt be able to acheive nice tight latencies just pure speed?

    mark
    Your right it will only run at those latencies if it was built to, that was my point it's no good saying that its better because it's PC3700/4000 that will work at 3200 speed for an AMD system when 95% of them cant run at the FSB needed to strecth the stuff with the tight timings. All the original poster would get is some expensive RAM he can only run at the same timings at some generic brand that cost 1/2 the price.
    In general PC3500 is ok to clock lower with tight timings, when you get up to pc3700 then the memory chip design changes to allow greater frequency at the cost of timings as most motherboards don't offer enough VDIMM to follow the route you suggest of overvolting the chips to allow higher clocks.

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    cat /dev/null streetster's Avatar
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    just to be pedantic
    pc4000 will run at pc3200 speeds (ie 400mhz), but it is not likely that it will run at reduced latencies because of the lower speed, hence if you are only going to be running around 400mhz you might aswell get ram with tight timings or (like you said knock_knock) if you are going to run at really loose timings just get some cheap (ie £30 a stick for 256mb) memory

    mark

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    I have tried running some Twinmoss 3700, Adata 4000 and a friend tried running some Corsair 3700 on our AMD rigs they all crapped out being set to CAS2 at any volts so they went back in the P4 boxes and now I make blanket statements on this subject, especially in the thread of someone who is new and wants to go AMD

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