Athlon X2 QL-64 vs Phenom II X3 720

The Athlon X2 QL-64 packs 2 cores / 2 threads, while the Phenom II X3 720 offers 3 cores / 3 threads — the Phenom II X3 720 has 1 more core. Boost clocks reach 2.1 GHz on the Athlon X2 QL-64 versus 2.8 GHz on the Phenom II X3 720 — a 28.6% clock advantage for the Phenom II X3 720. The Athlon X2 QL-64 uses the Lion (2008−2009) architecture (65 nm), while the Phenom II X3 720 uses Heka (2009−2010) (45 nm). In PassMark, the Athlon X2 QL-64 scores 1,614 against the Phenom II X3 720's 1,600 — a 0.9% lead for the Athlon X2 QL-64. L3 cache: 0 kB on the Athlon X2 QL-64 vs 6 MB (total) on the Phenom II X3 720.

The Athlon X2 QL-64 uses the S1 socket (PCIe 2.0), while the Phenom II X3 720 uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR2-667 on the Athlon X2 QL-64 versus DDR3-1333 on the Phenom II X3 720 — the Phenom II X3 720 supports 40% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Phenom II X3 720 supports up to 16 GB of RAM compared to 8 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 0 (Athlon X2 QL-64) vs 16 (Phenom II X3 720) — the Phenom II X3 720 offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Socket S1 (Athlon X2 QL-64) and AM3,AM2+ (Phenom II X3 720).

Only the Phenom II X3 720 has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Both support AMD-V virtualization. Primary use case: Phenom II X3 720 targets Legacy Desktop.

The Athlon X2 QL-64 launched at $50 MSRP, while the Phenom II X3 720 debuted at $130. At current prices ($15 vs $64), the Athlon X2 QL-64 is $49 cheaper. In terms of value (PassMark points per dollar), the Athlon X2 QL-64 delivers 107.6 pts/$ vs 25.0 pts/$ for the Phenom II X3 720 — making the Athlon X2 QL-64 the 124.6% better value option.