Core i7-3820QM vs Xeon E3-1280

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 i7-3820QM vs Xeon E3-1280 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 i7-3820QM vs Xeon E3-1280: Pros, Cons & Final Verdict

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

Core i7-3820QM

2012

Why buy it

✅Better for gaming: +3.7% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 45W instead of 95W, a 50W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with HD Graphics 4000, while Xeon E3-1280 needs a discrete GPU.

Trade-offs

❌Lower PassMark (5,607 vs 5,612).

Xeon E3-1280

2011

Why buy it

✅+0.1% higher PassMark.

Trade-offs

❌Worse for gaming: lower average FPS than Core i7-3820QM across 50 shared CPU benchmark tests.
❌111.1% higher power demand at 95W vs 45W.
❌No integrated graphics, while Core i7-3820QM can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core i7-3820QM better than Xeon E3-1280?

Not really, because they are built for different jobs. Xeon E3-1280 makes more sense for workstation-style multi-core throughput, while Core i7-3820QM 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 E3-1280 is the stronger fit. You are getting 0.1% better PassMark, backed by 4 cores and 8 threads.

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

Core i7-3820QM still makes the most sense overall. Core i7-3820QM comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 3.7% average FPS lead across 50 shared CPU game tests in our data.

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

Core i7-3820QM makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2012 vs 2011). That makes it the safer long-term bet.

Core i7-3820QM vs Xeon E3-1280 Technical Specifications

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

Core i7-3820QM

The Core i7-3820QM is manufactured by Intel. It was released in 29 April 2012 (13 years ago). It is based on the Ivy Bridge (2012−2013) architecture. It features 4 cores and 8 threads. Base frequency is 2.7 GHz, with boost up to 3.7 GHz. L3 cache: 8 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: PGA988. Thermal design power (TDP): 45 Watt. Memory support: DDR3. Passmark benchmark score: 5,607 points. Launch price was $498.

Xeon E3-1280

The Xeon E3-1280 is manufactured by Intel. It was released in 3 April 2011 (14 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 4 cores and 8 threads. Base frequency is 3.5 GHz, with boost up to 3.9 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1155. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 5,612 points. Launch price was $450.

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Processing Power

Both the Core i7-3820QM and Xeon E3-1280 share an identical 4-core/8-thread configuration. Boost clocks reach 3.7 GHz on the Core i7-3820QM versus 3.9 GHz on the Xeon E3-1280 — a 5.3% clock advantage for the Xeon E3-1280 (base: 2.7 GHz vs 3.5 GHz). The Core i7-3820QM uses the Ivy Bridge (2012−2013) architecture (22 nm), while the Xeon E3-1280 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Core i7-3820QM scores 5,607 against the Xeon E3-1280's 5,612 — a 0.1% lead for the Xeon E3-1280. Both processors carry 8 MB (total) of L3 cache.

Feature	Core i7-3820QM	Xeon E3-1280
Cores / Threads	4 / 8	4 / 8
Boost Clock	3.7 GHz	3.9 GHz+5%
Base Clock	2.7 GHz	3.5 GHz+30%
L3 Cache	8 MB (total)	8 MB (total)
L2 Cache	256K (per core)	256 kB (per core)
Process	22 nm-31%	32 nm
Architecture	Ivy Bridge (2012−2013)	Sandy Bridge (2011−2013)
PassMark	5,607	5,612
Geekbench 6 Single	604	—

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Memory & Platform

The Core i7-3820QM uses the PGA988 socket (PCIe 3.0), while the Xeon E3-1280 uses LGA1155 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Core i7-3820QM	Xeon E3-1280
Socket	PGA988	LGA1155
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	DDR3-1600	—
Max RAM Capacity	32 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—

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Advanced Features

Virtualization: VT-x, VT-d, EPT (Core i7-3820QM) / not specified (Xeon E3-1280). The Core i7-3820QM includes integrated graphics (HD Graphics 4000), while the Xeon E3-1280 requires a dedicated GPU. Primary use case: Core i7-3820QM targets High Performance Laptop. Direct competitor: Core i7-3820QM rivals A10-4600M.