RDRAM lost when overclocked

I have one strange thing to share about RDRAM here...

I'm using the ASUS P4T mobo which support only RDRAMs with S423 1.7GHz P4. OK here goes:

Originally I got 2 slots populated with 128MB of infenion PC800 RDRAM, that makes it 256MB of RAM and it ran stabily at 472MHz (effectively 944MHz which is overclocked from 800MHz). I took those out to test out the new RDRAMs that i got from a workstation PC.

Now I got 2 pieces of 128MB PC700 kingston RDRAM to test out. When I slot it in, the detected RAM is 256MB when I run it at 300MHz (100MHzx3). This is correct.

I then try the 4X FSB for my RAM, which is 400MHz (100MHzx4), the detected RAM still 256MB. This is correct also.

Then, when I clock my FSB to higher and maintain the RAM speed at 4X the FSB, the detected RAM gets lower, eg. at 118MHz (CPU at 2006MHz, RAM bus at 472MHz), the detected RAM is 96MB and at 112MHz (CPU at 1904MHz, RAM bus at 448MHz), the detected RAM is only 20MB.

Now, here's what I think that happened. The RDRAM is serial type of RAM not like those SDRAM which is parallel. So, when I change the clock speed, the synchronization is not right in the PC700 RDRAM and causes it to skip a few ram chips for each clock cycle. Therefore the number of RAM detected is getting less. Other than this, I have no idea where the RAM went???

The system won't hang even I ran a few benchmarks and it seems to be very stable. The only thing puzzled me is that, why there is no such article about this on the net?

PC700 is only garunteed stable at 350MHz (RDRAM also uses DDR technology, hence the PC700 name). So you're already overclocking it running it at PC800 speed. You're pushing the memory too hard and it's responding by not functioning properly.

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>

I know I'm pushing it too hard by making it running at 400MHz (effectively 800MHz ddr) but what I'm expecting is that the PC might hang or not responding but in fact it didn't. It is still running smoothly but with lesser RAM detected. Isn't that some kind of good fault tollerant?