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Winbond UTT vs TCCD (indicative comparison, not scientific):
Low Timings 2-2-2-X:
Winbond UTT (260-265 Mhz 1T @ ~3,4V) > TCCD (235-240 Mhz 1T @ ~2,85V)
Medium Timings 2,5-3-3-X:
TCCD (~300 Mhz 1T @ 2,85V) > Winbond UTT (263-268 Mhz 1T @ 3,4V)
High Timings 3-4-4-X...