CAS 4 or CAS 5

I am thinking about buying ram. I've narrowed it down to 2. does CAS 4 perform that much better than CAS 5

 

Depends. How fast is the ram? Are they both the same speed or different?

 

same speed ddr2667

 

If the processor is a Core 2 Duo, reports show it doesn't really benefit with faster CAS 4 latency RAM. If the price is a fair bit more too, then its not really worth going for. The difference in speed can only been seen in memory intensive applications, and even then, it is small.

 

There's CAS4 ddr2 667 ram for laptops now? Got a link?

 

http://www.newegg.com/Product/Produ...60381+1052910525+1309121117+1052508081&name=4

 

the first one on the top

 

They are different speeds (first one 533MHz & 2nd on 667MHz). So the lower latency is balanced against a higher clockspeed.

 

That's DDR2-533.

As noted whether you get CL4 or CL5 makes little difference. See this MadShrimps.be article on whether high performance RAM is worth it or not.

 

Chaz interesting read what it means is open to interpretation. Here is mine, the only bench that matters is SiSoft as it is a memory bandwidth test. Super Pi is a CPU test and if it was valid PC4200 is faster than PC5300 until you get CL3. Obviously flawed, more than being counterintuitive it defies logic, throw out results. PCMark 05 is not a RAM test either. So SiSoft is the only valid test, w/667Mhz the difference between CL4 and CL5 is 10% to 11%. While I would not lose sleep over that, it is an amount that is more than a little.

 

it's quite clear you did not get the point at all. The only tests which matter are not benchmark applications.

If you want to spend more money so you can boast a higher "sisoft score" sure go ahead. in real world app and daily use that extra money spend will however bring you close to no extra improvement

 

Very glad you dug up an 8 month old thread to contribute that. I am confused as the link I refereed to was nothing but benchmarks? The only tests provided were benchmarks? I mean if you are saying none of it really matters fine 2.0Ghz vs 2.5Ghz CPU? Sure it doesn't in the real world with most applications but there is a difference. I stand by what I said and have to question if you get what I am saying to even be able to comment on it in a constructive way? I commented that the 667 vs 533 was counter intuitive, the writer noticed the same thing. So it is noteworthy at least for the writer and me. The answer is the FSB is 1066 so it syncs with 533, 667 is out of sync so it loses on Super-pi not enough of a speed advantage to overcome the sync issue. Since this is a desktop test those FSB issues do not affect notebooks and you do get the better performance with the faster RAM. And lower latency, not large I know I said. PC-5300 CL4 is cheaper than many PC-5300 CL5 cost is not much of a factor with notebook RAM. Most everyday applications don't stress the RAM, don't stress most current gen CPU's or even 5400 and above HDD's but people still buy more powerful when in budget. Almost no one plays the buy what I need game. The manufacturers as a matter of fact are only selling things above many normal users needs. But so be it. So the answer is CL4 and CL5 cost about the same so buy which ever you want. The link was a desktop test does not translate to notebooks for reasons stated.

 

Guys,

Thread closed...please dont revive old threads.

-Kdawgca
NBR Mod