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To get them to run depends primarily on the mobo, how they've implemented (tweaked) the chipset and/or BIOS. Too often the generalized excuse of weak controller/weak channel is provided as a general response. Where I stand and argue the point heavily, is primarily with boards where I have done exactly what you say can't be, just as a general answer, when in fact I KNOW it can be done.
What you are planning to do, i.e. the 1800 packaged as 6 sticks advertised as 1600 also covers what I've others here, that RAM being sold at non JEDEC standard speeds, i.e. 900, 1000 is generally RAM that when tested doesn't fully meet JEDEC standards, again i.e. a batch of 1066 is off slightly and doesn't test out ccan be packaged and sold as 1000 or 900.
If one is persistent and willing to try various tweaks, you often can get RAM to run. I personally don't advocate pushing voltages to limits that shorten the life of a mobo, cpu, etc though, in these forums I try to offer advice primarily based on the prime 5 of RAM, the other (and numerous) timing settings available can often be used to stabilize and run RAM to it's full potential and/or overclock.
The problem with those settings is that it almost has to be hands on, i.e. I need the system in front of me, what I can try and test in an hour would probably take days to go through with a user via these forums.
I have considered providing a more complete RAM tweaking guide here, but it would probably lead to more problems than good
What you are planning to do, i.e. the 1800 packaged as 6 sticks advertised as 1600 also covers what I've others here, that RAM being sold at non JEDEC standard speeds, i.e. 900, 1000 is generally RAM that when tested doesn't fully meet JEDEC standards, again i.e. a batch of 1066 is off slightly and doesn't test out ccan be packaged and sold as 1000 or 900.
If one is persistent and willing to try various tweaks, you often can get RAM to run. I personally don't advocate pushing voltages to limits that shorten the life of a mobo, cpu, etc though, in these forums I try to offer advice primarily based on the prime 5 of RAM, the other (and numerous) timing settings available can often be used to stabilize and run RAM to it's full potential and/or overclock.
The problem with those settings is that it almost has to be hands on, i.e. I need the system in front of me, what I can try and test in an hour would probably take days to go through with a user via these forums.
I have considered providing a more complete RAM tweaking guide here, but it would probably lead to more problems than good
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