Core i7-3635QM vs Xeon L5640

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.

Head-to-Head Verdict, Benchmarks, Value & Long-Term Outlook

This comparison brings together gaming FPS, productivity performance, platform differences, power efficiency, pricing context, and upgrade path so you can see which CPU actually makes more sense.

Core i7-3635QM

2012

Why buy it

✅Draws 45W instead of 60W, a 15W reduction.

Trade-offs

❌Smaller total L3 cache (6 MB vs 12 MB).
❌Less compelling for workstation-style loads than Xeon L5640, which brings 6 cores / 12 threads.

Xeon L5640

2010

Why buy it

✅+100% larger total L3 cache (12 MB vs 6 MB).
✅Better for workstations and heavier parallel workloads: 6 cores / 12 threads.

Trade-offs

❌Lower PassMark (4,659 vs 4,728).
❌Launch MSRP is still $996 MSRP, while Core i7-3635QM mostly shows up through inconsistent older-market listings.
❌33.3% higher power demand at 60W vs 45W.

Core i7-3635QM

2012

Xeon L5640

2010

Why buy it

✅Draws 45W instead of 60W, a 15W reduction.

Why buy it

✅+100% larger total L3 cache (12 MB vs 6 MB).
✅Better for workstations and heavier parallel workloads: 6 cores / 12 threads.

Trade-offs

❌Smaller total L3 cache (6 MB vs 12 MB).
❌Less compelling for workstation-style loads than Xeon L5640, which brings 6 cores / 12 threads.

Trade-offs

❌Lower PassMark (4,659 vs 4,728).
❌Launch MSRP is still $996 MSRP, while Core i7-3635QM mostly shows up through inconsistent older-market listings.
❌33.3% higher power demand at 60W vs 45W.

Quick Answers

So, is Core i7-3635QM better than Xeon L5640?

Not in a simple one-size-fits-all way. Xeon L5640 makes more sense for workstation-style multi-core throughput, while Core i7-3635QM is the better mainstream desktop choice for gaming, platform cost, and day-to-day practicality.

Which one is better for gaming?

If gaming is the priority, Core i7-3635QM is the better pick here. According to our tests, it delivers 0.6% more average FPS across 3 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Core i7-3635QM is the better fit. You are getting 1.5% better PassMark, backed by 4 cores and 8 threads.

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

Core i7-3635QM is still the faster CPU overall, but Xeon L5640 makes more sense if price matters more than absolute performance. Core i7-3635QM is at an unclear MSRP at unclear MSRP versus $996 MSRP, and it gives you a 0.6% average FPS lead across 3 shared CPU game tests in our data. Xeon L5640 is also 100.0% better value on MSRP (4.7 vs 0.0 PassMark/$), which is why it is easier to justify for price-conscious builds on paper.

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

Core i7-3635QM is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2012 vs 2010) and more multi-core headroom with 4 cores / 8 threads instead of 6/12. That extra compute headroom should age better as games, background tasks, and creator workloads get heavier.

Games Benchmarks

Paired with RTX 4090

To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.

Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.

Core i7-3635QM Benchmark Check

Xeon L5640 Benchmark Check

Path of Exile 2

Preset	Core i7-3635QM	Xeon L5640
1080p
low	118 FPS	116 FPS
medium	118 FPS	116 FPS
high	110 FPS	105 FPS
ultra	88 FPS	87 FPS
1440p
low	118 FPS	116 FPS
medium	118 FPS	111 FPS
high	92 FPS	86 FPS
ultra	73 FPS	70 FPS
4K
low	68 FPS	61 FPS
medium	61 FPS	55 FPS
high	47 FPS	43 FPS
ultra	37 FPS	34 FPS

Open Core i7-3635QM Open Xeon L5640

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i7-3635QM	Xeon L5640
1080p
low	118 FPS	116 FPS
medium	118 FPS	116 FPS
high	118 FPS	116 FPS
ultra	111 FPS	116 FPS
1440p
low	118 FPS	116 FPS
medium	118 FPS	116 FPS
high	118 FPS	116 FPS
ultra	99 FPS	107 FPS
4K
low	118 FPS	116 FPS
medium	111 FPS	116 FPS
high	87 FPS	104 FPS
ultra	63 FPS	74 FPS

Open Core i7-3635QM Open Xeon L5640

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i7-3635QM	Xeon L5640
1080p
low	118 FPS	116 FPS
medium	118 FPS	116 FPS
high	118 FPS	116 FPS
ultra	118 FPS	116 FPS
1440p
low	118 FPS	116 FPS
medium	118 FPS	116 FPS
high	118 FPS	116 FPS
ultra	118 FPS	116 FPS
4K
low	118 FPS	116 FPS
medium	118 FPS	116 FPS
high	118 FPS	116 FPS
ultra	118 FPS	116 FPS

Open Core i7-3635QM Open Xeon L5640

League of Legends

League of Legends

Valorant

Preset	Core i7-3635QM	Xeon L5640
1080p
low	118 FPS	116 FPS
medium	118 FPS	116 FPS
high	118 FPS	116 FPS
ultra	118 FPS	116 FPS
1440p
low	118 FPS	116 FPS
medium	118 FPS	116 FPS
high	118 FPS	116 FPS
ultra	118 FPS	116 FPS
4K
low	118 FPS	116 FPS
medium	118 FPS	116 FPS
high	118 FPS	116 FPS
ultra	118 FPS	116 FPS

Open Core i7-3635QM Open Xeon L5640

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i7-3635QM and Xeon L5640

Core i7-3635QM

The Core i7-3635QM is manufactured by Intel. It was released in 1 September 2012 (13 years ago). It is based on the Ivy Bridge (2012−2013) architecture. It features 4 cores and 8 threads. Base frequency is 2.4 GHz, with boost up to 3.4 GHz. L3 cache: 6 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: FCBGA1224. Thermal design power (TDP): 45 Watt. Memory support: DDR3. Passmark benchmark score: 4,728 points. Launch price was $69.

Xeon L5640

The Xeon L5640 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 2.26 GHz, with boost up to 2.8 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 60 Watt. Memory support: DDR3. Passmark benchmark score: 4,659 points. Launch price was $200.

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Processing Power

The Core i7-3635QM packs 4 cores / 8 threads, while the Xeon L5640 offers 6 cores / 12 threads — the Xeon L5640 has 2 more cores. Boost clocks reach 3.4 GHz on the Core i7-3635QM versus 2.8 GHz on the Xeon L5640 — a 19.4% clock advantage for the Core i7-3635QM (base: 2.4 GHz vs 2.26 GHz). The Core i7-3635QM uses the Ivy Bridge (2012−2013) architecture (22 nm), while the Xeon L5640 uses Westmere-EP (2010−2011) (32 nm). In PassMark, the Core i7-3635QM scores 4,728 against the Xeon L5640's 4,659 — a 1.5% lead for the Core i7-3635QM. L3 cache: 6 MB (total) on the Core i7-3635QM vs 12 MB (total) on the Xeon L5640.

Feature	Core i7-3635QM	Xeon L5640
Cores / Threads	4 / 8	6 / 12+50%
Boost Clock	3.4 GHz+21%	2.8 GHz
Base Clock	2.4 GHz+6%	2.26 GHz
L3 Cache	6 MB (total)	12 MB (total)+100%
L2 Cache	256K (per core)	256 kB (per core)
Process	22 nm-31%	32 nm
Architecture	Ivy Bridge (2012−2013)	Westmere-EP (2010−2011)
PassMark	4,728+1%	4,659

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Memory & Platform

The Core i7-3635QM uses the FCBGA1224 socket (PCIe 3.0), while the Xeon L5640 uses LGA1366 (PCIe 5.0) — making them incompatible on the same motherboard.

Feature	Core i7-3635QM	Xeon L5640
Socket	FCBGA1224	LGA1366
PCIe Generation	PCIe 3.0	PCIe 5.0+67%
Max RAM Speed	—	DDR3 1333 MHz
Max RAM Capacity	—	288 GB
RAM Channels	—	3
ECC Support	—	Yes
PCIe Lanes	—	0