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Thread: Clock Speed or Cas Latency???




  1. #1
    Join Date
    Dec 2008
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    Default Clock Speed or Cas Latency???

    I am upgrading my laptop memory and can't seem to decide on which one would be faster. I hear that the lower cas latency the faster the memory, but how does it relate to clock speed. Candidate #1 is Hyper X DDR2 667 (PC2 5300) with a cas latency 4-4-4-12. Candidate #2 is Hyper X DDR2 800 (PC2 6400) with a cas latency 5-5-5-18. My dilemma is that one runs at a lower clock speed at 667MHz with a lower cas lat, but the other has a higher clockspeed at 800MHz but also higher cas lat. Which one is faster since they are the same price. Or which one is the better buy? I am open to suggestions. Thanks ahead for those who reply.



  2. #2

    Default Re: Clock Speed or Cas Latency???

    What are the other specs of your system? What do you plan to use it for? Are you going to be overclocking?
    Nothing is impossible... Just mathematically improbable..

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  3. #3
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    Default Re: Clock Speed or Cas Latency???

    I have a C2D T7300 Memrom @ 2GHZ, 2 X 1GB Crucial PC2-5300 DDR667, FSB 800MHz running at 200 MHz X10. I hope this is enough information. :( I am no planning to OC this laptop. What is more important, clock speed or cas latency???? Sorry to bother you guys with what seems to be a simple question.

  4. #4

    Default Re: Clock Speed or Cas Latency???

    To me, IT depends on your setup. Eg. Right now I have ddr2 667. I was contemplating between DDR2800 AND DRR21066. While the DDR2 1066 would give me much more headway for overclocking, the DDR2800 with the tighter timings would be all that I need.

    IMHO, go with the DDR8 800 and tighten the timings manually to 4-4-4-12
    Nothing is impossible... Just mathematically improbable..

    "The best defense against computer viruses might not even be antivirus software, but a crafty combination of education and common sense."

    Intel Pentium e5200 @ 3.8HZ (380 X 10)
    Giga-byte GA-EP35-DS3L
    Mushkin 4GB DDR2 800 @ 760MHZ 4-4-3-10 @ +0.3v
    SAPPHIRE 100245L Radeon HD 4850 512MB 256-bit GDDR3 PCI Express 2.0 x16
    Seagate 160GB @ 7200rpm
    SB Audigy2
    Corsair 520HX
    Super Antec Lanboy
    Windows 7 Ultimate 64bit RTM
    Acer AL2216Wbd 22"

  5. #5
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    Dec 2008
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    Default Re: Clock Speed or Cas Latency???

    Thanks soldier. I forgot to tell you that its a gateway laptop so bios is locked. If I can't change the settings should I go with the 800 anyways, since the 667 will soon be obsolete? I'll keep you suggestion on mind when I go to OC my desktop sometime today.

  6. #6
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    Default Re: Clock Speed or Cas Latency???

    You do know you can't overclock laptops right?
    Lower cas timings would most likely be faster BECAUSE it takes less runs through the RAM to get to the other components

  7. #7
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    Default Re: Clock Speed or Cas Latency???

    oh I know that laptops can't be overclock. I was referring to my desktop, but the questions is regarding the clockspeed and cas latency. Which would be faster, higher clock speed higher cas latency (DDR 800, 5-5-5-18) or lower clock speed lower cas latency (DDR 667 4-4-4-12) on a memory.

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