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DDR CAS latency?
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Original Message
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Name: pjrm101
Date: January 15, 2004 at 20:13:02 Pacific
Subject: DDR CAS latency?
OS: Windows XP
CPU/Ram: Athlon XP 2700/512MB DDR
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Comment: Can anyone please tell me the difference between running RAM at SPD, 2T, or 3T in CAS latency settings? My system was unstable at 166 fsb until I changed the RAM setting to 3T. Now, it works fine. My question is whether or not I've slowed down the RAM to the point where it might affect performance. Thanks for your help--
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Response Number 1
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Name: Monarch
Date: January 15, 2004 at 22:09:06 Pacific
Subject: DDR CAS latency?
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Reply: (edit)CL is the min. number if cycles the ram must wait till it can read/write again. By raising the number you did slow it down, but wether or not you will see a degrade in performance or atleast one you can see, can only be asertained through testing ie. use the computer and see if you notice a diffrince.
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Response Number 2
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Name: pjrm101
Date: January 16, 2004 at 07:16:16 Pacific
Subject: DDR CAS latency?
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Reply: (edit)Thanks for the reply--do you think this could be because I'm using a no-name brand of RAM? I'm wondering if I replaced the RAM with something like Kingston or Crucial if I would be able to run it at full speed.
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Response Number 3
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Name: Monarch
Date: January 16, 2004 at 08:53:12 Pacific
Subject: DDR CAS latency?
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Reply: (edit)Generic ram uses the cheepest components and often has a CL of 3 and will increase frequency of system lock-ups due to signal noise within the lower quality memory module. Basicaly generic is cheep for a reason....its cheep. Here is what I would do, purchase a high quality RAM, and try to use it at full speed, if it dosent work return in.
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Response Number 4
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Name: Real_Cool
Date: January 16, 2004 at 11:24:25 Pacific
Subject: DDR CAS latency?
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Reply: (edit)There is not much gain at all in CL2 versus CL3. The trick is high FSB. There is no such a thing as "cheap" or "cheep" components. There are not many chip makers in the world. Making memory chip is not like running a bakery. It requires large sum of capital with difficult business entry. What they do is buy the "low end" chip from manufacturers - and market it at the lower price point. Corsair does not produce memory chip, they work with manufacturers and only package get the high end product for the brand. Micron and Samsung are the only two manufacturers making and selling memory under their own brand names.
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Response Number 6
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Name: pjrm101
Date: January 16, 2004 at 17:06:49 Pacific
Subject: DDR CAS latency?
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Reply: (edit)You guys are great--thanks for the advice. Now let's see if you can handle my next question: how noticeable would the difference be between PC2700 and PC3200? I'd be running it on an ECS L7S7A2 board with an Athlon XP 2700. Is there a distinct advantage to going with the 3200? Thanks again...
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Response Number 7
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Name: Monarch
Date: January 16, 2004 at 17:17:28 Pacific
Subject: DDR CAS latency?
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Reply: (edit)You keep askinig how noticable the diffrence would be, but again it depends on what your doing, and how memory intensive the task is.
I wouldnt make the upgrade, but I dont do alot a intensive tasks,and I dont like to spend alot of money :)
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Response Number 8
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Name: pjrm101
Date: January 16, 2004 at 18:03:18 Pacific
Subject: DDR CAS latency?
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Reply: (edit)What I would be doing mostly is video encoding, such as turning DVD files into .avi files. This is pretty CPU-intensive stuff, so that's why I was wondering if there would be a big difference. (Also because Circuit City is having a great sale on PC2700 right now...)
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