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Thread: 4.0 ns DDR - What speeds?

  1. Jul 6th, 2002, 06:09 PM #1
    siyan
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    4.0 ns DDR - What speeds?

    How fast can I run 4.0 ns DDR SGRAM? (no heatsinks)

    The card (GF2 Ti.. I know I know but it cost me a grand total of $40) runs default at 200DDR/400SDR, and I've bumped it up to 220DDR/440SDR without incident.

    Anybody going to support my volition to hit 250/500?

    -C
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  2. Jul 7th, 2002, 12:50 AM #2
    Warmaster199
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    4ns means 4 billionths of a second is the time it takes to respond.

    Let's do some quick math: 1 billion / 4 = 250 million of those 4ns cycles, or 250MHz.



    Concidering that:
    You can push that RAM to 250MHz DDR



    But remember, ANY higher than that and the chips WILL fail to respond in time. The result will be unreliable system operation and therefore, a crash. But, you can always reset the values and your system will work correctly with NO problems...

    BTW: How does one boost the RAM's clock speed? I'm stuck with PC100 type SDRAM DIMMs...
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  3. Jul 7th, 2002, 11:15 AM #3
    siyan
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    Is it acutally that simple to do the conversion? I mean we learned the frequency/period stuff first thing in Physics last semester...

    I should try it in the winter Right now its a tad warm and without RAMsinks I'm not going to try...

    As for your SDRAM, you can probably go into the motherboard BIOS and tweak some settings.
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  4. Jul 7th, 2002, 12:35 PM #4
    Warmaster199
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    Will do...
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  6. Jul 7th, 2002, 02:15 PM #5
    JungleMan
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    No, Warmaster, since it's DDR, that would be an effective speed of 500Mhz actually...

    Siyan just make sure it's cooled good and you can go even higher
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  7. Jul 7th, 2002, 02:46 PM #6
    siyan
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    Originally posted by JungleMan
    No, Warmaster, since it's DDR, that would be an effective speed of 500Mhz actually...
    he said 250 DDR
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  8. Jul 7th, 2002, 02:46 PM #7
    siyan
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    and we dont need cooling up here in canada!
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  9. Jul 7th, 2002, 05:14 PM #8
    Warmaster199
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    Actually it's 250 million bytes(times 4 for 32-bits) / sec transfer rate. Since there are 2 channels per DIMM, each channel does the 250MHz. So that's where you get the 500MHz from... Like Siyan said in his first post, 250 DDR / 500 SDR. I am still correct, and you are as well Just remember that 250/500 is the limit for that RAM.

    I couldn't boost my RAM speed. My BIOS is stupid... But it knows exactly what type of DIMM is in each slot, which I thought was cool. I did a search on my motherboard (AOpen V66XA AGP M/B w/ Intergrated ATI RAGE 3D & Crystal sound). It's mean't for Pentium II, I have a 350MHz PII in there right now, yet someone took an image of the BIOS and looked in the binary strings... It seems as though my board will house a Pentium III @ 500MHz without any problems. This site also said there are some versions of this board that even support Pentium III @ 800MHz. Interesting, but now a good idea - crappy video card.

    BTW: Are there special heatsinks designed for RAM? I have never heard of those...
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  11. Jul 8th, 2002, 04:14 PM #9
    siyan
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    nah just get a whole new system..

    Some video cards have heatsinks preinstalled on the RAM in addition to an HSF on the GPU. Mine only has a HSF

    I'm quite certain you can get little heatsinks that somehow attach to RAM...htey're just a bit hard to find.

    Corsair is making a "XMS" series of PC2700 DDR SDRAM chips i think....they're overclocked PC2100s with heatsinks

    -C
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  12. Jul 8th, 2002, 04:25 PM #10
    JungleMan
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    Originally posted by siyan
    Corsair is making a "XMS" series of PC2700 DDR SDRAM chips i think....they're overclocked PC2100s with heatsinks

    -C
    They are true PC2700 chips I believe...the XMS3000s and 3200s are overclocked PC2700s.
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