[halcour]

I know you're not supposed to mix memory modules, but I have an extra 256 mg module that's a different brand from the modules now in my system. My mb (ASUS) manual says "For dual channel configuration the total size of memory modules installed per channel must be the same for better performance" which I have now w/the 2 512 mg modules installed (Patriot). It also says "Always install modules w/the same CAS latency".

My questions:

1) Could installing the 256 mg module actually weaken performance of the "dual channel configuration"?

2) If it is a different CAS latency, could it harm the mb or other memory modules in any way?

I figure if it doesn't work, the system just won't boot and I'll remove the extra module. But if it does boot, I want to be sure no harm is done to the mb, the other modules, and that it won't actually degrade the dual channel performance of the other 2 modules.

Thanks much,
Harold

 

[griffinspc]

Yes, you can weaken the performance for sure. Even if it wasn't dual channel memory always seeks the lowest level or speed. The CAS will not harm the PC but will cause performance problems also. So you don't say, other then being a different brand, if this 256 chip is the same as your installed 1GB. Is it all DDR400 for example or are you trying to mix DDR400 with DDR266?

 

[halcour]

The modules in my system already are DDR400 and "PC3200". The only info I have on the extra 256 mb module is that it's "PC2100". Does that tell you anything?

Thanks,
H

 

[griffinspc]

Yes, the PC2100 (or DDR266) is quite a step below your PC3200 (DDR400). Even without the dual channel question this would reduce all your RAM to running at PC2100 speed. I'd scrap the plan to add it to your machine. Finally even if this were compatible quality Patriot RAM, adding 256 MBs to 1 GB wouldn't do much of anything for you. You wouldn't even notice it.

 

[halcour]

Ok, I thought that might be the case. Thanks for clearing it up.

H

 

[griffinspc]

You're welcome. If the threads done you can mark it closed with the Thread Tools at the top.