Difference between CAS 2.5 and 3??

By vegasgmc ยท 5 replies
Jul 30, 2004
  1. I got some PC3200 on sale yesterday and didnt notice until I got home it was CAS 3. My old RAM is 2.5 but its PC2100.
  2. BrownPaper

    BrownPaper TS Rookie Posts: 407

    CAS 3 is a little bit slower than CAS 2.5. On synthetic benchmarks, CAS 2 is a lot faster than CAS 3. CAS 2.5 is somewhere in between (although closer to 2).

    I'm not sure about real world performance though. There is probably not a great difference in performance.
  3. Didou

    Didou Bowtie extraordinair! Posts: 4,274

  4. vegasgmc

    vegasgmc TechSpot Chancellor Topic Starter Posts: 1,377

    I was asking because I couldnt get the new RAM to work right. It turns out its PC2700 not 3200 like the label says.
  5. Bug

    Bug TS Rookie Posts: 79

    label says 3200 and it only works at 2700 speeds? Where did you get it? I would return it and get a refund. Another think about a lower CAS latency (3,2.5,2,1) is that it is better for overclocking. Typically better ram all around.

  6. vegasgmc

    vegasgmc TechSpot Chancellor Topic Starter Posts: 1,377

    I exchanged it yesterday. The new stick runs perfectly at 3200. Its also CAS 3 but I have it set at 2.5.
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