For the record, I have got only nice things to say for Kingston Memory.
These sticks are more that 4 years old, and yet when I run only two of them, I can easily push beyond 1300 MHz
with NO additional voltage given to either MCH or FSB. I think my record was um, 1320ish MHz stable (2 sticks).
My MOBO doesn't have an option to set the mem divider. It is set automatically by the board. My board calls
mem dividers "Bootstrap(s)". When I use 2 sticks, my board defaults to either 1066 or 1333 "bootstrap".
When I use 4 sticks, my board defaults to an 800 MHz "bootstrap".
There is an option to use "Memory Overlcok Setting 1" and "Memory Overclock Setting 2". I have tested both settings.
It looks to me that the board cannot go beyond 1088 MHz stable with 4 sticks in. Since you are more experienced than
me, I'd like to hear what you think.
(Many thanks for the latency program too).
Key** 1066 or 1333 boot strap
Latency for these NB straps is very tight... 775 NB will cope with latency into the low 40ns range but its very tough to even surpass 50ns stable with 4GB's from my experience. My guess is your NB is at a "latency limit" with the amount of RAM you are running and the speed/timings. You are also the victim of a poor BIOS, without the ability to loosen NB strap ..
My advice would be to use a program like MaxxMem or Everest, to measure RAM/NB latency as you increase RAM speeds with 4GB's ... monitor latency decreases, and push for stability. You will find a point at which you will have to loosen latency [either with RAM timings, or sub-timings and Performance Level/Static T-read adjustments and skew] to push for more speed or remain stable at the current latency.
*Im curious to see where your latency is now with the settings you have.. Also - what RAM sub-timings and NB adjustments does your BIOS contain? Can you link me to a BIOS listing for your mobo?