Sorry I should have mentioned that, I forgot. I'm using Intel i7-920 2.67Ghz.
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- Your processor is capable of supporting only 1, 2 & 4 GB DIMMs (to a maximum of 16GB); it cannot support 8GB DIMMs.
- For optimal memory access performance, use three identical DIMMs in the (blue) Channel A DIMM0, Channel B and Channel C sockets.
- If you add a DIMM in the (black) Channel A DIMM 1 socket, it must be identical to the DIMM in the (blue) Channel A DIMM 0 socket.
- By 'identical', I mean same size, same voltage, same weight state configuration, etc. Optimally, you have purchased the four DIMMs as two matched-pairs (i.e. they are identical and have been tested together).
- Adding a DIMM in the (black) Channel A DIMM 1 socket will indeed reduce memory access performance. In my opinion, the improvements in overall O/S performance as a result of having 16GB (instead of 12GB) of memory should easily offset the reduced memory access performance. I thus consider this upgrade to be a net win.
Hope this helps,
Thanks a lot for quick response. Should I switch any feature on/off in bios something like xmp or qpi, (not remembering exact terms) to turn off triple channel configuration?
By reducing memory access performance, will it mean that audio or video production applications will be affected in performance? Loading and uploading virtual instruments, audio buffering, etc will be coming slower? Which might result in playback hiccups or buffering issues?
No, no changes in BIOS configuration are necessary.
No, I don't think this will affect performance at that level.
But at the moment I have Corsair Vengeance 3 ram dimms each 4 gb and 1600 mhz. So buying one more identical will be fine or will it damage my cpu or mother board? The voltage is 1.5.
No, provided you can find one with identical specs. If you can't, you might have to purchase two that match and replace the one in Channel A...
I didn't understand. You mean I must not put 1600 mhz which is identical to others?
Just because two DIMMs are both 1600 MHz does not mean they are the same. You need to match the timings (wait-states, etc.), etc.
The two DIMMs that will share Channel A *must* be a marched pair. That is, use two of your existing three DIMMs for this channel and use the new DIMM in one of the other channels.
Hope this explains it,