Core 2 Duo SL9600 vs Xeon E5420

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 2 Duo SL9600 vs Xeon E5420 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 2 Duo SL9600 vs Xeon E5420: Pros, Cons & Final Verdict

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

Core 2 Duo SL9600

2009

Why buy it

✅+0.5% higher PassMark.
✅Costs $6,898 less on MSRP ($316 MSRP vs $7,214 MSRP).
✅Delivers 2194.1% more PassMark for each dollar spent, at 6.5 vs 0.3 PassMark/$ ($316 MSRP vs $7,214 MSRP).
✅Draws 6W instead of 80W, a 74W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon E5420 across 50 shared CPU benchmark tests.
❌Smaller total L3 cache (6 MB vs 12 MB).
❌Less compelling for workstation-style loads than Xeon E5420, which brings 4 cores / 4 threads and 32 PCIe lanes.

Xeon E5420

2007

Why buy it

✅Better for gaming: +3.7% higher average FPS across 50 shared CPU benchmark tests.
✅+100% larger total L3 cache (12 MB vs 6 MB).
✅Better for workstations and heavier parallel workloads: 4 cores / 4 threads, plus 32 PCIe lanes vs 0.
✅100+% more PCIe lanes (32 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (2,044 vs 2,054).
❌Lower PassMark per dollar, at 0.3 vs 6.5 PassMark/$ ($7,214 MSRP vs $316 MSRP).
❌1233.3% higher power demand at 80W vs 6W.

Quick Answers

So, is Core 2 Duo SL9600 better than Xeon E5420?

Not really, because they are built for different jobs. Xeon E5420 makes more sense for workstation-style multi-core throughput, while Core 2 Duo SL9600 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, Core 2 Duo SL9600 is the stronger fit. You are getting 0.5% better PassMark, backed by 2 cores and 2 threads.

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

Core 2 Duo SL9600 is the better buy right now. Core 2 Duo SL9600 comes in $6,898 cheaper on MSRP at $316 MSRP versus $7,214 MSRP, and it still gives you 0.5% better PassMark. The compromise is that Xeon E5420 is still the better pure gaming CPU with a 3.7% average FPS lead across 50 shared CPU game tests in our data. It is also 2194.1% better value on MSRP (6.5 vs 0.3 PassMark/$), 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 2 Duo SL9600 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2007) and more multi-core headroom with 2 cores / 2 threads instead of 4/4. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core 2 Duo SL9600 vs Xeon E5420 Technical Specifications

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

Core 2 Duo SL9600

The Core 2 Duo SL9600 is manufactured by Intel. It was released in 1 March 2009 (16 years ago). It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 2.13 GHz, with boost up to 2.13 GHz. L3 cache: 6 MB L2 Cache. L2 cache: 6 MB. Built on 45 nm process technology. Socket: BGA956. Thermal design power (TDP): 17 Watt. Passmark benchmark score: 2,054 points. Launch price was $316.

Xeon E5420

The Xeon E5420 is manufactured by Intel. It was released in 11 November 2007 (18 years ago). It is based on the Harpertown (2007−2008) architecture. It features 4 cores and 4 threads. Base frequency is 2.5 GHz, with boost up to 2.5 GHz. L3 cache: 12 MB L2 Cache. L2 cache: 6 MB (total). Built on 45 nm process technology. Socket: LGA771. Thermal design power (TDP): 80 Watt. Memory support: DDR2, DDR3 Depends on motherboard. Passmark benchmark score: 2,044 points. Launch price was $316.

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Processing Power

The Core 2 Duo SL9600 packs 2 cores / 2 threads, while the Xeon E5420 offers 4 cores / 4 threads — the Xeon E5420 has 2 more cores. Boost clocks reach 2.13 GHz on the Core 2 Duo SL9600 versus 2.5 GHz on the Xeon E5420 — a 16% clock advantage for the Xeon E5420 (base: 2.13 GHz vs 2.5 GHz). The Core 2 Duo SL9600 uses the Penryn (2008−2011) architecture (45 nm), while the Xeon E5420 uses Harpertown (2007−2008) (45 nm). In PassMark, the Core 2 Duo SL9600 scores 2,054 against the Xeon E5420's 2,044 — a 0.5% lead for the Core 2 Duo SL9600. L3 cache: 6 MB L2 Cache on the Core 2 Duo SL9600 vs 12 MB L2 Cache on the Xeon E5420.

Feature	Core 2 Duo SL9600	Xeon E5420
Cores / Threads	2 / 2	4 / 4+100%
Boost Clock	2.13 GHz	2.5 GHz+17%
Base Clock	2.13 GHz	2.5 GHz+17%
L3 Cache	6 MB L2 Cache	12 MB L2 Cache+100%
L2 Cache	6 MB	6 MB (total)
Process	45 nm	45 nm
Architecture	Penryn (2008−2011)	Harpertown (2007−2008)
PassMark	2,054	2,044
Geekbench 6 Single	—	314
Geekbench 6 Multi	—	881

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Memory & Platform

The Core 2 Duo SL9600 uses the BGA956 socket (PCIe 1.1), while the Xeon E5420 uses LGA771 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1066 on the Core 2 Duo SL9600 versus DDR2-667 on the Xeon E5420 — the Core 2 Duo SL9600 supports 59.8% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon E5420 supports up to 32 GB of RAM compared to 8 GB — 300% more capacity for professional workloads. Memory channels: 2 (Core 2 Duo SL9600) vs 4 (Xeon E5420). PCIe lanes: 0 (Core 2 Duo SL9600) vs 32 (Xeon E5420) — the Xeon E5420 offers 32 more lanes for additional GPUs or NVMe drives. Chipset compatibility: GS45,GM45,PM45 (Core 2 Duo SL9600) and Intel 5000P,Intel 5100,Intel 5400 (Xeon E5420).

Feature	Core 2 Duo SL9600	Xeon E5420
Socket	BGA956	LGA771
PCIe Generation	PCIe 1.1	PCIe 2.0+82%
Max RAM Speed	DDR3-1066+60%	DDR2-667
Max RAM Capacity	8 GB	32 GB+300%
RAM Channels	2	4+100%
ECC Support	No	Yes
PCIe Lanes	0	32

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Advanced Features

Virtualization support: VT-x, VT-d (Core 2 Duo SL9600) vs Yes (Xeon E5420). Primary use case: Core 2 Duo SL9600 targets Mobile.

Feature	Core 2 Duo SL9600	Xeon E5420
Integrated GPU	No	No
Unlocked	No	—
AVX-512	No	No
Virtualization	VT-x, VT-d	Yes
Target Use	Mobile	—

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Value Analysis

At launch, the Core 2 Duo SL9600 was priced at $316, while the Xeon E5420 came in at $7214. On launch pricing ($316 vs $7214), Core 2 Duo SL9600 was $6898 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core 2 Duo SL9600 delivers 6.5 pts/$ vs 0.3 pts/$ for the Xeon E5420 — making the Core 2 Duo SL9600 the 183.3% better value option.

Feature	Core 2 Duo SL9600	Xeon E5420
MSRP	$316-96%	$7214
Performance per Dollar	6.5+2067%	0.3
Release Date	2009	2007

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