1T command rate with DDR2

Uhm, so I recently read somewhere about how running ram at a 1T command rate (versus 2T stock) helps increase memory performance %6 - %18 depending on whats being tested. So... does anyone know what tricks will help DDR2 run at 1T? I haven't actually attempted to try 1T yet, I thought I'd ask first. Would I have to decrease the frequency? Up the voltage? Loosen the timings? Or is it as simple as toggling to 1T in the BIOS?

My ram: Product Page

Specs:
DDR2-1066mhz (5-6-6-18-24-2T) @ 2.1v
DDR2-800mhz (5-6-6-18-24-2T) @ 1.8v
DDR2-667mhz (4-5-5-15-20-2T) @ 1.8v
DDR2-533mhz (3-4-4-12-16-2T) @ 1.8v

My current max OC's:
DDR2-1120mhz (6-6-6-20-26-2T) @ 2.25v (210mhz bus / 3:8)
DDR2-1040mhz (5-5-5-15-24-2T) @ 2.29v (260mhz bus / 1:2)
DDR2-925mhz (4-5-5-15-20-2T) @ 2.25v (225mhz bus / 1:2)

And my DIMM's stay in the 25c - 30c temps at full speed and 2.3v

Consider: a CAS operation at five clocks with 2T takes seven clocks to do.
A CAS operation at five clocks with 1T takes six clocks to do.
The difference in time for the operation is 14.3%.

I should clarify that I meant 1-2% faster overall performance, not memory performance. That's the hit I measured when I had to run DDR memory at 2T instead of 1T to prevent errors.

Will a 14.3% faster command rate result in 14.3% overall memory speed when commands make up only a small proportion of the memory accesses?

Well... I actually got it running fine at all stock settings using 1T CR, and it ran about 5% faster (talking about memory performance,) and 1-2% faster system performance. Obviously I OC'ing was alot harder. My best performing OC with 2T was:
1015mhz (1:2 divider) - (5-5-5-15-24-2T) @ 2.23v

and using 1T:
880mhz (1:2 divider) - (5-6-6-18-26-1T) @ 2.29v

The 2T OC was about 5% better (or 10% then stock) then the 1T OC, with about 4% increase in system performance. Also... SiSoft SANDRA reported the channel efficiency of the 2T to be about 78% and 1T to be about 63% when OC'd... I am guessing thats what makes the difference. Oh well, it sounded cool at least