Celeron 3755U vs Core 2 Duo T9800

PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.

Celeron 3755U vs Core 2 Duo T9800 FPS Benchmarks

Predicted gaming performance across popular games. Tested paired with GeForce RTX 5090 to isolate CPU performance.

Search any supported game below to compare 1080p FPS for both components.

Celeron 3755U vs Core 2 Duo T9800: Pros, Cons & Final Verdict

See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.

Celeron 3755U

2015

Why buy it

✅100+% more PCIe lanes (12 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with HD Graphics (Broadwell), while Core 2 Duo T9800 needs a discrete GPU.

Trade-offs

❌Lower PassMark (1,182 vs 1,189).
❌Smaller total L3 cache (2 MB vs 6 MB).
❌150% higher power demand at 15W vs 6W.

Core 2 Duo T9800

2009

Why buy it

✅+200% larger total L3 cache (6 MB vs 2 MB).
✅Draws 6W instead of 15W, a 9W reduction.

Trade-offs

❌No integrated graphics, while Celeron 3755U can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core 2 Duo T9800 better than Celeron 3755U?

Yes. Core 2 Duo T9800 is the better all-around CPU here. It gives you a 0.2% average FPS lead across 50 shared CPU game tests in our data and 0.6% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Core 2 Duo T9800 is the better pick. According to our tests, it delivers 0.2% more average FPS across 50 shared CPU game tests.

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Core 2 Duo T9800 is the stronger fit. You are getting 0.6% better PassMark, backed by 2 cores and 2 threads. It also has the larger cache pool with 200% larger total L3 cache (6 MB vs 2 MB).

Which one is the smarter buy today, not just the cheaper CPU?

Core 2 Duo T9800 still makes the most sense overall. Core 2 Duo T9800 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 0.2% average FPS lead across 50 shared CPU game tests in our data.

Which one is more future-proof for 2026 and beyond?

Celeron 3755U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2015 vs 2009). That makes it the safer long-term bet.

Celeron 3755U vs Core 2 Duo T9800 Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

Celeron 3755U

The Celeron 3755U is manufactured by Intel. It was released in 1 March 2015 (10 years ago). It is based on the Broadwell-U (2015) architecture. It features 2 cores and 2 threads. Base frequency is 1.7 GHz, with boost up to 1.7 GHz. L3 cache: 2 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: FCBGA1168. Thermal design power (TDP): 15 Watt. Memory support: DDR3. Passmark benchmark score: 1,182 points. Launch price was $107.

Core 2 Duo T9800

The Core 2 Duo T9800 is manufactured by Intel. It was released in 1 January 2009 (16 years ago). It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 2.93 GHz, with boost up to 2.92 GHz. L3 cache: 6 MB L2 Cache. L2 cache: 6 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 35 Watt. Passmark benchmark score: 1,189 points. Launch price was $530.

⚡

Processing Power

Both the Celeron 3755U and Core 2 Duo T9800 share an identical 2-core/2-thread configuration. Boost clocks reach 1.7 GHz on the Celeron 3755U versus 2.92 GHz on the Core 2 Duo T9800 — a 52.8% clock advantage for the Core 2 Duo T9800 (base: 1.7 GHz vs 2.93 GHz). The Celeron 3755U uses the Broadwell-U (2015) architecture (14 nm), while the Core 2 Duo T9800 uses Penryn (2008−2011) (45 nm). In PassMark, the Celeron 3755U scores 1,182 against the Core 2 Duo T9800's 1,189 — a 0.6% lead for the Core 2 Duo T9800. L3 cache: 2 MB (total) on the Celeron 3755U vs 6 MB L2 Cache on the Core 2 Duo T9800.

Feature	Celeron 3755U	Core 2 Duo T9800
Cores / Threads	2 / 2	2 / 2
Boost Clock	1.7 GHz	2.92 GHz+72%
Base Clock	1.7 GHz	2.93 GHz+72%
L3 Cache	2 MB (total)	6 MB L2 Cache+200%
L2 Cache	256K (per core)+4167%	6 MB
Process	14 nm-69%	45 nm
Architecture	Broadwell-U (2015)	Penryn (2008−2011)
PassMark	1,182	1,189
Geekbench 6 Multi	625	—

🧠

Memory & Platform

The Celeron 3755U uses the FCBGA1168 socket (PCIe 3.0), while the Core 2 Duo T9800 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard.

Feature	Celeron 3755U	Core 2 Duo T9800
Socket	FCBGA1168	PGA478
PCIe Generation	PCIe 3.0+173%	PCIe 1.1
Max RAM Speed	DDR3L-1600	—
Max RAM Capacity	16 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	12	—

🔧

Advanced Features

Virtualization: VT-x, VT-d (Celeron 3755U) / not specified (Core 2 Duo T9800). The Celeron 3755U includes integrated graphics (HD Graphics (Broadwell)), while the Core 2 Duo T9800 requires a dedicated GPU. Primary use case: Celeron 3755U targets Budget. Direct competitor: Celeron 3755U rivals Pentium 3825U.