Core i3-2100 vs Xeon E5345

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.

Core i3-2100 vs Xeon E5345 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.

Core i3-2100 vs Xeon E5345: Pros, Cons & Final Verdict

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

Core i3-2100

2011

Why buy it

✅Draws 65W instead of 80W, a 15W reduction.

Trade-offs

❌Lower PassMark (1,856 vs 1,868).
❌Smaller total L3 cache (3 MB vs 8 MB).
❌Less compelling for workstation-style loads than Xeon E5345, which brings 4 cores / 4 threads.
❌Launch MSRP is still $117 MSRP, while Xeon E5345 mostly shows up through inconsistent older-market listings.

Xeon E5345

2006

Why buy it

✅+0.6% higher PassMark.
✅+166.7% larger total L3 cache (8 MB vs 3 MB).
✅Better for workstations and heavier parallel workloads: 4 cores / 4 threads.

Trade-offs

❌23.1% higher power demand at 80W vs 65W.

Quick Answers

So, is Core i3-2100 better than Xeon E5345?

Not really, because they are built for different jobs. Xeon E5345 makes more sense for workstation-style multi-core throughput, while Core i3-2100 is the more practical desktop choice for gaming, platform cost, and everyday use.

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

For streaming, content creation, and heavier multitasking, Xeon E5345 is the stronger fit. You are getting 0.6% better PassMark, backed by 4 cores and 4 threads. It also has the larger cache pool with 166.7% larger total L3 cache (8 MB vs 3 MB).

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

Core i3-2100 is the better buy right now. Core i3-2100 comes in at an unclear MSRP at $117 MSRP versus unclear MSRP, and it still gives you a 1.9% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Xeon E5345 is still stronger for heavier multi-core work with 0.6% better PassMark. It is also 100.0% better value on MSRP (15.9 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Core i3-2100 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2011 vs 2006). That makes it the safer long-term bet.

Core i3-2100 vs Xeon E5345 Technical Specifications

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

Core i3-2100

The Core i3-2100 is manufactured by Intel. It was released in 20 February 2011 (14 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 2 cores and 4 threads. Base frequency is 3.1 GHz, with boost up to 3.1 GHz. L3 cache: 3 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1155. Thermal design power (TDP): 65 Watt. Memory support: DDR3. Passmark benchmark score: 1,856 points. Launch price was $73.

Xeon E5345

The Xeon E5345 is manufactured by Intel. It was released in 14 November 2006 (19 years ago). It is based on the Clovertown (2006−2007) architecture. It features 4 cores and 4 threads. Base frequency is 2.33 GHz, with boost up to 0.33 GHz. L3 cache: 8 MB L2 Cache. L2 cache: 4 MB (total). Built on 65 nm process technology. Socket: LGA771. Thermal design power (TDP): 80 Watt. Memory support: DDR2, DDR3 Depends on motherboard. Passmark benchmark score: 1,868 points. Launch price was $851.

⚡

Processing Power

The Core i3-2100 packs 2 cores / 4 threads, while the Xeon E5345 offers 4 cores / 4 threads — the Xeon E5345 has 2 more cores. Boost clocks reach 3.1 GHz on the Core i3-2100 versus 0.33 GHz on the Xeon E5345 — a 161.5% clock advantage for the Core i3-2100 (base: 3.1 GHz vs 2.33 GHz). The Core i3-2100 uses the Sandy Bridge (2011−2013) architecture (32 nm), while the Xeon E5345 uses Clovertown (2006−2007) (65 nm). In PassMark, the Core i3-2100 scores 1,856 against the Xeon E5345's 1,868 — a 0.6% lead for the Xeon E5345. L3 cache: 3 MB (total) on the Core i3-2100 vs 8 MB L2 Cache on the Xeon E5345.

Feature	Core i3-2100	Xeon E5345
Cores / Threads	2 / 4	4 / 4+100%
Boost Clock	3.1 GHz+839%	0.33 GHz
Base Clock	3.1 GHz+33%	2.33 GHz
L3 Cache	3 MB (total)	8 MB L2 Cache+167%
L2 Cache	256 kB (per core)	4 MB (total)+1500%
Process	32 nm-51%	65 nm
Architecture	Sandy Bridge (2011−2013)	Clovertown (2006−2007)
PassMark	1,856	1,868

🧠

Memory & Platform

The Core i3-2100 uses the LGA1155 socket (PCIe 2.0), while the Xeon E5345 uses LGA771 (PCIe 2.0) — making them incompatible on the same motherboard.