Core i7-3720QM 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 i7-3720QM 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 i7-3720QM 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 i7-3720QM

2012

Why buy it

✅Draws 45W instead of 95W, a 50W reduction.

Trade-offs

❌Lower PassMark (5,591 vs 5,612).
❌Smaller total L3 cache (6 MB vs 8 MB).

Xeon E3-1280

2011

Why buy it

✅+33.3% larger total L3 cache (8 MB vs 6 MB).

Trade-offs

❌111.1% higher power demand at 95W vs 45W.

Quick Answers

So, is Xeon E3-1280 better than Core i7-3720QM?

Not really, because they are built for different jobs. Xeon E3-1280 makes more sense for workstation-style multi-core throughput, while Core i7-3720QM is the more practical desktop choice for gaming, platform cost, and everyday use.

Which one is better for gaming?

If gaming is the priority, Xeon E3-1280 is the better pick. According to our tests, it delivers 2.7% 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, Xeon E3-1280 is the stronger fit. You are getting 0.4% better PassMark, backed by 4 cores and 8 threads. It also has the larger cache pool with 33.3% larger total L3 cache (8 MB vs 6 MB).

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

Xeon E3-1280 still makes the most sense overall. Xeon E3-1280 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 2.7% average FPS lead across 50 shared CPU game tests in our data.

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

Core i7-3720QM 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 i7-3720QM vs Xeon E3-1280 Technical Specifications

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

Core i7-3720QM

The Core i7-3720QM 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 2.6 GHz, with boost up to 3.6 GHz. L3 cache: 6 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: 5,591 points. Launch price was $378.

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 i7-3720QM and Xeon E3-1280 share an identical 4-core/8-thread configuration. Boost clocks reach 3.6 GHz on the Core i7-3720QM versus 3.9 GHz on the Xeon E3-1280 — a 8% clock advantage for the Xeon E3-1280 (base: 2.6 GHz vs 3.5 GHz). The Core i7-3720QM 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 i7-3720QM scores 5,591 against the Xeon E3-1280's 5,612 — a 0.4% lead for the Xeon E3-1280. L3 cache: 6 MB (total) on the Core i7-3720QM vs 8 MB (total) on the Xeon E3-1280.

Feature	Core i7-3720QM	Xeon E3-1280
Cores / Threads	4 / 8	4 / 8
Boost Clock	3.6 GHz	3.9 GHz+8%
Base Clock	2.6 GHz	3.5 GHz+35%
L3 Cache	6 MB (total)	8 MB (total)+33%
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	5,591	5,612

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Memory & Platform

The Core i7-3720QM uses the PGA988 socket (PCIe 3.0), while the Xeon E3-1280 uses LGA1155 (PCIe 2.0) — making them incompatible on the same motherboard.