Here is the strap I've put together:
777000000000000022CC1C00106A5B47C0570E16B08C05090068C70014051420FA8900A00300000 0190D2F399D2D2E17
The timings from wolf and ohgodagirls vbios decode tools release:
You should update to the version with my changes that show CAS timing. I see you're using CL=22. With Samsung CL=21 I was getting errors at 2100 (OK at 2000). I'll give 22 a try.
Here's what I was using @2000:
555000000000000022CC1C00CE595B3ED0570F1531CB2409004007000B0314207A8900A00300000
0170F2E36922A3217
update: no luck with CL=22@2100; too many HW errors. I'm pretty sure the Samsung RAM on these cards is rated for 1750, so getting stable results at 2000 is still pretty good.