Xeon E3-1225 v5 vs Xeon X5660

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.

Xeon E3-1225 v5 vs Xeon X5660 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.

Xeon E3-1225 v5 vs Xeon X5660: Pros, Cons & Final Verdict

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

Xeon E3-1225 v5

2015

Why buy it

✅Draws 80W instead of 95W, a 15W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon X5660 across 46 shared CPU benchmark tests.
❌Lower PassMark (5,953 vs 5,979).
❌Smaller total L3 cache (8 MB vs 12 MB).

Xeon X5660

2010

Why buy it

✅Better for gaming: +17.4% higher average FPS across 46 shared CPU benchmark tests.
✅+50% larger total L3 cache (12 MB vs 8 MB).

Trade-offs

❌Launch MSRP is still $1,219 MSRP, while Xeon E3-1225 v5 mostly shows up through inconsistent older-market listings.
❌18.8% higher power demand at 95W vs 80W.

Quick Answers

So, is Xeon X5660 better than Xeon E3-1225 v5?

Yes. Xeon X5660 is the better all-around CPU here. It gives you a 17.4% average FPS lead across 46 shared CPU game tests in our data and 0.4% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Xeon X5660 is the better pick. According to our tests, it delivers 17.4% more average FPS across 46 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Xeon X5660 is the stronger fit. You are getting 0.4% better PassMark, backed by 6 cores and 12 threads. It also has the larger cache pool with 50% larger total L3 cache (12 MB vs 8 MB).

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

Xeon X5660 is the better buy right now. Xeon X5660 comes in at an unclear MSRP at $1,219 MSRP versus unclear MSRP, and it still gives you a 17.4% average FPS lead across 46 shared CPU game tests in our data. It is also 100.0% better value on MSRP (4.9 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Xeon E3-1225 v5 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2015 vs 2010). That makes it the safer long-term bet.

Xeon E3-1225 v5 vs Xeon X5660 Technical Specifications

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

Xeon E3-1225 v5

The Xeon E3-1225 v5 is manufactured by Intel. It was released in 19 October 2015 (10 years ago). It is based on the Skylake-DT (2015) architecture. It features 4 cores and 4 threads. Base frequency is 3.3 GHz, with boost up to 3.7 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 80 Watt. Memory support: DDR4-1866/2133, DDR3L-1333/1600. Passmark benchmark score: 5,953 points. Launch price was $224.

Xeon X5660

The Xeon X5660 is manufactured by Intel. It was released in 16 March 2010 (15 years ago). It is based on the Westmere-EP (2010−2011) architecture. It features 6 cores and 12 threads. Base frequency is 2.8 GHz, with boost up to 3.2 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 5,979 points. Launch price was $33.

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Processing Power

The Xeon E3-1225 v5 packs 4 cores / 4 threads, while the Xeon X5660 offers 6 cores / 12 threads — the Xeon X5660 has 2 more cores. Boost clocks reach 3.7 GHz on the Xeon E3-1225 v5 versus 3.2 GHz on the Xeon X5660 — a 14.5% clock advantage for the Xeon E3-1225 v5 (base: 3.3 GHz vs 2.8 GHz). The Xeon E3-1225 v5 uses the Skylake-DT (2015) architecture (14 nm), while the Xeon X5660 uses Westmere-EP (2010−2011) (32 nm). In PassMark, the Xeon E3-1225 v5 scores 5,953 against the Xeon X5660's 5,979 — a 0.4% lead for the Xeon X5660. L3 cache: 8 MB (total) on the Xeon E3-1225 v5 vs 12 MB (total) on the Xeon X5660.

Feature	Xeon E3-1225 v5	Xeon X5660
Cores / Threads	4 / 4	6 / 12+50%
Boost Clock	3.7 GHz+16%	3.2 GHz
Base Clock	3.3 GHz+18%	2.8 GHz
L3 Cache	8 MB (total)	12 MB (total)+50%
L2 Cache	256 kB (per core)	256 kB (per core)
Process	14 nm-56%	32 nm
Architecture	Skylake-DT (2015)	Westmere-EP (2010−2011)
PassMark	5,953	5,979

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Memory & Platform

The Xeon E3-1225 v5 uses the LGA1151 socket (PCIe 3.0), while the Xeon X5660 uses LGA1366 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Xeon E3-1225 v5	Xeon X5660
Socket	LGA1151	LGA1366
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	—	DDR3-1333
RAM Channels	—	3
ECC Support	—	Yes

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Advanced Features

Virtualization: not specified (Xeon E3-1225 v5) / VT-x, VT-d, EPT (Xeon X5660). Primary use case: Xeon X5660 targets Workstation. Direct competitor: Xeon X5660 rivals Core i7-980X.