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 T3100 vs Core 2 Duo T9400 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 T3100 vs Core 2 Duo T9400: Pros, Cons & Final Verdict

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

Celeron T3100

2008

Why buy it

✅+9.4% higher Geekbench single-core performance for gaming and desktop responsiveness.

Trade-offs

❌Lower PassMark (945 vs 1,004).
❌Smaller total L3 cache (1 MB vs 6 MB).
❌Launch MSRP is still $62 MSRP, while Core 2 Duo T9400 mostly shows up through inconsistent older-market listings.
❌483.3% higher power demand at 35W vs 6W.

Core 2 Duo T9400

2008

Why buy it

✅+6.2% higher PassMark.
✅+500% larger total L3 cache (6 MB vs 1 MB).
✅Draws 6W instead of 35W, a 29W reduction.

Trade-offs

❌Lower Geekbench single-core performance for gaming (320 vs 350).

Quick Answers

So, is Core 2 Duo T9400 better than Celeron T3100?

It depends on what you want from the system. For gaming, Celeron T3100 is ahead with a 2.4% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core 2 Duo T9400 pulls ahead with 6.2% better PassMark. Core 2 Duo T9400 also has the bigger cache pool with 500% larger total L3 cache (6 MB vs 1 MB).

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

For streaming, content creation, and heavier multitasking, Core 2 Duo T9400 is the stronger fit. You are getting 6.2% better PassMark, backed by 2 cores and 2 threads. It also has the larger cache pool with 500% larger total L3 cache (6 MB vs 1 MB).

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

Core 2 Duo T9400 is still the much better call for a fresh build. Core 2 Duo T9400 comes in at an unclear MSRP at unclear MSRP versus $62 MSRP, and it still gives you 6.2% better PassMark. Celeron T3100 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2008 platform. Even with 100.0% better value on paper (15.2 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on PGA478.

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

Core 2 Duo T9400 makes more sense long term for 2026 and beyond. You are getting 500% larger total L3 cache (6 MB vs 1 MB). That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Celeron T3100 vs Core 2 Duo T9400 Technical Specifications

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

Celeron T3100

The Celeron T3100 is manufactured by Intel. It was released in 2007-01-01. Base frequency: 1.9 GHz. L3 cache: 1 MB L2 Cache. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 35 Watt. Passmark benchmark score: 945 points. Launch price was $69.

Core 2 Duo T9400

The Core 2 Duo T9400 is manufactured by Intel. It was released in 15 July 2008 (17 years ago). It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 2.53 GHz, with boost up to 2.53 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: 1,004 points. Launch price was $316.

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Processing Power

The Core 2 Duo T9400 is built on the Penryn (2008−2011) architecture. In PassMark, the Celeron T3100 scores 945 against the Core 2 Duo T9400's 1,004 — a 6.1% lead for the Core 2 Duo T9400. Geekbench 6 single-core — the metric most relevant to gaming — records 350 vs 320, a 9% lead for the Celeron T3100 that directly translates to higher frame rates. L3 cache: 1 MB L2 Cache on the Celeron T3100 vs 6 MB L2 Cache on the Core 2 Duo T9400.

Feature	Celeron T3100	Core 2 Duo T9400
Cores / Threads	—	2 / 2
Boost Clock	—	2.53 GHz
Base Clock	1.9 GHz	2.53 GHz+33%
L3 Cache	1 MB L2 Cache	6 MB L2 Cache+500%
L2 Cache	—	6 MB
Process	45 nm	45 nm
Architecture	—	Penryn (2008−2011)
PassMark	945	1,004+6%
Geekbench 6 Single	350+9%	320
Geekbench 6 Multi	650	—

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Memory & Platform

Both processors use the PGA478 socket with PCIe 2.0. Maximum memory speed reaches DDR3-800 on the Celeron T3100 versus DDR3-1066 on the Core 2 Duo T9400 — the Core 2 Duo T9400 supports 33.3% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both feature 2-channel memory with ECC support. Chipset compatibility: GL40,GM45 (Celeron T3100) and GM45,PM45 (Core 2 Duo T9400).

Feature	Celeron T3100	Core 2 Duo T9400
Socket	PGA478	PGA478
PCIe Generation	PCIe 2.0+82%	PCIe 1.1
Max RAM Speed	DDR3-800	DDR3-1066+33%
Max RAM Capacity	8 GB	—
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	0	—

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Advanced Features

Neither processor supports overclocking. Virtualization support: None (Celeron T3100) vs VT-x (Core 2 Duo T9400). Primary use case: Celeron T3100 targets Legacy Laptop, Core 2 Duo T9400 targets Budget. Direct competitor: Core 2 Duo T9400 rivals Athlon Silver 3050U.