I would just find some low density RAM just in case. Although I believe the RAM should work, there is always a possible that it won't and the manual for your motherboard doesn't explicitly say anything about high density vs low density so better to err on the side of caution. I think high density RAM modules are for server computers (but they still aren't ECC so maybe I'm wrong).
I also see that that RAM is 1.8V (volts) which might be an issue with your motherboard also. I would try to find some that is 1.5V.
I remember in my last computer I had 4 sticks of 1GB DDR2 800 (PC2 6400) and they were supposed to be run at 1.65V. My motherboard only officially supported 1.5V modules so I had to manually bump up the voltage to 1.65V (which may or may not be possible on your motherboard) but those were "high performance" modules.
So, just find some DDR2 667 or DDR2 800 modules that are "low density" and around 1.5V, at least that is my take, maybe someone could weigh in.