View Full Version : mixing 2x256 and 2x512 RAM

10-28-05, 10:14 PM
Ok.. I've got another stupid question. (I found out the answer to my other stupid question below. My case fan just didn't come with the 3/4 pin connector and only came with the 4 pin connector so there's no way for it to talk to the motherboard unless I buy a cable, and I found those at newegg for about $7 for two).

My latest stupid question: I'm currently running Corsair XMS PC3200 DDR400 2x256. I'd like to upgrade my memory as I only have 512 and games are requiring more. I could just add another 512 easily, but I'm thinking maybe I want to add some Corsair 2x512 modules instead.

How will this effect my ability to overclock my CPU? Providing I install 2x512 modules that are also PC3200?

Will I have problems? I'm going to go with more Corsair XMS series memory for the 2x512.. so the question is can I go with 2x256 AND 2x512 or do I just need to stick with another 2x256 module? (Or, just go with one 2x512 module)?


10-28-05, 10:25 PM
With a mixed bag you may get mixed results so it is hard to tell. It depends on the motherboard (chipset) and the ram. You may be able to run dual channel and you may not. Same goes for the overclock and ram timings you are use to with the 256MB sticks.
I would just go with 2x512MB or 2x1GB and leave it at that.

10-28-05, 11:22 PM
I would look at selling what you have and getting 2 x 1GB sticks, that's what i just did and it made a huge difference

10-29-05, 08:14 AM
I run 2x256 & 2x512 using all four DIMMS.

The trick is this:

1. either use Intel or use a venice or later AMD core.

2. keep all four modules the same make, model and timings.

3. Put the largest pair in channel 0 the smallest in channel 1

4. if your using AMD force your command rate to 2T in your BIOS.

10-30-05, 04:08 PM
Thanks for all your replies.

I'm planning on doing what you suggest, Superfly. Thanks. You can by my ram 2x256 new on newegg for $66 so it's not like I'll be able to get very much for them by trying to sell them.