DDR CAS Latency Question

[Spaceloaf]

I'm buying some PC2100 memory, but most of the RAM I see for sale is actually CAS2.5 latency. I was wondering if you guys actually purchase CAS2 memory, or do you just get some CAS2.5 memory and change the timing in the BIOS?

Thanks,
Spaceloaf

 

[Reliant]

You should be able to find plenty of PC2100 CAS2 memory.
Forcing a lower CAS in the bios can cause same nasty problems.

 

[Reliant]

I was looking around and I did not realize how many PC2100 chips are rated
at CAS 2.5.
I still can find some CAS2.
Kingmax has some and I have heard good things from friends about it.

 

[adlep]

lol
welcome to the forums
The rule of thumb says: You can run a brand name memory (like crucial, samsung, corsair, etc) rated CAS 2.5 @ CAS 2.0 without any problems.....

 

[Spaceloaf]

Thanks for the replys. I saw some cheap Samsung CAS2.5 RAM at www.googlegear.com, so I think I'll get some of that.

 

[rogue1979]

I have used OCZ PC2400 and Corsair PC2400 rated at cas 2. The both run 166MHz+ at cas 2. I have used two crusty generic sticks of PC2100 rated at cas 2.5. The both ran fine at 133MHz cas 2, however I did not try running them on a higher fsb. I also bought a stick of Crucial PC2100 rated at cas 2.5, it also hit 166MHz+ at cas 2. I would just find the cheapest Crucial you can, unless you plan to run higher than 166MHz, then get some Samsung.

 

[dbwillis]

You can change the CAS and other settings in most BIOS's.
If you get CAS 2 memory, you can change it to CAS 2.5 w/no problems.
But sometimes if you change CAS 2.5 memory to CAS 2, it might not do it.
I got some Mushkin level 2 (CAS 2-2-2) at 266mhz, it runs CAS 2.5 at 440mhz with no problem.

 

[littlezipp]

<< Thanks for the replys. I saw some cheap Samsung CAS2.5 RAM at www.googlegear.com, so I think I'll get some of that. >>

I have some CAS2 Samsung for sale, and I'm sure it is cheaper than Googlegear! It is PC 2100 512mb CAS 2 ram. The spd is cas 2, it is not 2.5 at 2. Also it is ECC. If you are interested email me or pm me!

 

[Zap]

"official" CAS2 DDR is available. You just have to find it. Newegg has some cheap Dane Elec stuff that's CAS2. About $125 for 512MB PC2100 CAS2. I've used a few sticks in builds for other people and if set to "SPD" in BIOS, reports as CAS2, as advertised.

 

[Barrei]

🙂If your getting samsung memory make sure it has pcb made by samsung its called original samsung some have samsung chips that aren't on samsung pcb .

 

[Spaceloaf]

Hmm, damn, googlegear doesn't seem to give any detailed info on the RAM. Now I'm not sure how quality the RAM really is. Is $53.50 too cheap for good memory? Can anyone recommend a "trustworthy" vendor to purchase from? I know that lots of evil stores like to rip people off on memory...

 

[littlezipp]

Try Newegg, but always start with a specific model # if you know what you want!