Celeron G3900T vs Celeron B800

Both the Celeron G3900T and Celeron B800 share an identical 2-core/2-thread configuration. Boost clocks reach 2.6 GHz on the Celeron G3900T versus 1.5 GHz on the Celeron B800 — a 53.7% clock advantage for the Celeron G3900T (base: 2.6 GHz vs 1.5 GHz). The Celeron G3900T uses the Skylake (2015−2016) architecture (14 nm), while the Celeron B800 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Celeron G3900T scores 1,900 against the Celeron B800's 1,910 — a 0.5% lead for the Celeron B800. L3 cache: 2 MB on the Celeron G3900T vs 2 MB (total) on the Celeron B800.

The Celeron G3900T uses the LGA1151 socket (PCIe 3.0), while the Celeron B800 uses PGA988 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2133 on the Celeron G3900T versus DDR3-1333 on the Celeron B800 — the Celeron G3900T supports 28.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron G3900T supports up to 64 GB of RAM compared to 16 GB — 120% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: H110,B150,H170,Z170 (Celeron G3900T) and HM65,HM67,QM67,QM77 (Celeron B800).

Neither processor supports overclocking. Both support VT-x virtualization. Both include integrated graphics — HD Graphics 510 (Celeron G3900T) and HD Graphics (Sandy Bridge) (Celeron B800) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Celeron G3900T targets Budget, Celeron B800 targets Budget. Direct competitor: Celeron G3900T rivals Pentium G4400T; Celeron B800 rivals Pentium 967.

The Celeron G3900T launched at $42 MSRP, while the Celeron B800 debuted at $80. At current prices ($70 vs $5), the Celeron B800 is $65 cheaper. In terms of value (PassMark points per dollar), the Celeron G3900T delivers 27.1 pts/$ vs 382.0 pts/$ for the Celeron B800 — making the Celeron B800 the 173.5% better value option.