Although many people reported that Sun Microsystems' UltraSPARC T1 (known as "Niagara" until its 14 November 2005 release) and the now defunct processor codenamed "Rock" (originally announced in 2005, but after many delays cancelled in 2009) are implementations of SPARC focused almost entirely on exploiting SMT and CMP techniques, Niagara is not actually using SMT.
尽管许多人报告，昇陽電腦的UltraSPARC T1（在其于2005年11月14日发布前，它被称为“Niagara”）和现在已经停用的代号“Rock”（最早于2005年宣布，但在许多延误后于2009年取消）的处理器是着眼于几乎完全利用SMT和CMP技术的SPARC的实现，Niagara实际并不使用SMT。