System Board Option # Manufacturing Part # Description Previous Part # n/a 541-3302 [F] 1 × 2.52 GHz CPU, SPARC64 VII Quad Core, n/a n/a 541-3674 [F] 1 × 2.52 GHz CPU, SPARC64 VII Dual Core, n/a n/a 542-0420 [F] 1 × 2.86GHz CPU, SPARC VII+ Quad Core n/a n/a 542-0421 [F] 1 × 2.86GHz CPU, SPARC VII+ Dual Core n/a n/a 542-0436 [F] 1 × 2.86GHz CPU, SPARC VII+ Quad Core n/a n/a 542-0443 [F] 1 × 2.86GHz CPU, SPARC VII+ Dual Core n/a n/a F541-4281 [F] 1 × 2.75 GHz CPU, SPARC64 VII Quad Core, n/a n/a F541-4282 [F] 1 × 2.75 GHz CPU, SPARC64 VII Dual Core, n/a