Well I have my replacement LE sticks on the way from Newegg: it's gonna be show me time.
I'm getting picky now with TCCD and I'm looking for ones that respond to voltage, so you don't have to rely on luck of the draw. My best set of TCCD are the later PQI I got after Newegg sold out of the first batch. This 2x512 pair did 290, 1:1, 2.5-3-3-6 on an AI7 at 3.05 volts (3920 unbuffered). In comparison, the LEs did 271 and did not budge with volts. The PQI can probably do 295 at 3.1-3.2 volts, but wouldn't bench 3D till 281 or so, so no point in going higher. I have not tested on A64 yet but there is a good chance it will bench 3D on this platform.
I've been flogging my first pair of TCCD and they do nothing after several months of burn in. Same with Vitesta PC600. Both use BP PCB too. If anything, I find Ballistix and XMS3500 burn in a little. My worse pair of 2x512 XMS3500 last did 248 or so, 2-2-2-5 at 3.28 volts, but now do 252 - on A64 anyway.