Core i7-5820K vs Xeon E5-2628L V3

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 i7-5820K vs Xeon E5-2628L V3 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 i7-5820K vs Xeon E5-2628L V3: Pros, Cons & Final Verdict

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

Core i7-5820K

2014

Why buy it

✅100+% more PCIe lanes (28 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon E5-2628L V3 across 50 shared CPU benchmark tests.
❌Lower PassMark (9,826 vs 9,949).
❌Smaller total L3 cache (15 MB vs 25 MB).
❌Less compelling for workstation-style loads than Xeon E5-2628L V3, which brings 10 cores / 20 threads.
❌Launch MSRP is still $389 MSRP, while Xeon E5-2628L V3 mostly shows up through inconsistent older-market listings.

Xeon E5-2628L V3

2014

Why buy it

✅Better for gaming: +6.0% higher average FPS across 50 shared CPU benchmark tests.
✅+66.7% larger total L3 cache (25 MB vs 15 MB).
✅Better for workstations and heavier parallel workloads: 10 cores / 20 threads.
✅Draws 75W instead of 140W, a 65W reduction.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Quick Answers

So, is Xeon E5-2628L V3 better than Core i7-5820K?

Not really, because they are built for different jobs. Xeon E5-2628L V3 makes more sense for workstation-style multi-core throughput, while Core i7-5820K 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 E5-2628L V3 is the better pick. According to our tests, it delivers 6.0% 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 E5-2628L V3 is the stronger fit. You are getting 1.3% better PassMark, backed by 10 cores and 20 threads. It also has the larger cache pool with 66.7% larger total L3 cache (25 MB vs 15 MB).

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

Xeon E5-2628L V3 is still the much better call for a fresh build. Xeon E5-2628L V3 comes in at an unclear MSRP at unclear MSRP versus $389 MSRP, and it still gives you a 6.0% average FPS lead across 50 shared CPU game tests in our data. Core i7-5820K only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2014 platform. Even with 100.0% better value on paper (25.3 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA2011.

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

Xeon E5-2628L V3 makes more sense long term for 2026 and beyond. You are getting 66.7% larger total L3 cache (25 MB vs 15 MB) and more multi-core headroom with 10 cores / 20 threads instead of 6/12. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core i7-5820K vs Xeon E5-2628L V3 Technical Specifications

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

Core i7-5820K

The Core i7-5820K is manufactured by Intel. It was released in 1 September 2014 (11 years ago). It is based on the Haswell-E (2014) architecture. It features 6 cores and 12 threads. Base frequency is 3.3 GHz, with boost up to 3.6 GHz. L3 cache: 15 MB (total). L2 cache: 256 kB (per core). Built on 22 nm process technology. Socket: LGA2011. Thermal design power (TDP): 140 Watt. Memory support: DDR4. Passmark benchmark score: 9,826 points. Launch price was $410.

Xeon E5-2628L V3

The Xeon E5-2628L V3 is manufactured by Intel. It was released in 2015-01-01. It is based on the Haswell-EP (2014−2015) architecture. It features 10 cores and 20 threads. Base frequency is 2 GHz, with boost up to 2.5 GHz. L3 cache: 25 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: LGA2011-3. Thermal design power (TDP): 75 Watt. Memory support: DDR4-1866. Passmark benchmark score: 9,949 points. Launch price was $800.

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Processing Power

The Core i7-5820K packs 6 cores / 12 threads, while the Xeon E5-2628L V3 offers 10 cores / 20 threads — the Xeon E5-2628L V3 has 4 more cores. Boost clocks reach 3.6 GHz on the Core i7-5820K versus 2.5 GHz on the Xeon E5-2628L V3 — a 36.1% clock advantage for the Core i7-5820K (base: 3.3 GHz vs 2 GHz). The Core i7-5820K uses the Haswell-E (2014) architecture (22 nm), while the Xeon E5-2628L V3 uses Haswell-EP (2014−2015) (22 nm). In PassMark, the Core i7-5820K scores 9,826 against the Xeon E5-2628L V3's 9,949 — a 1.2% lead for the Xeon E5-2628L V3. L3 cache: 15 MB (total) on the Core i7-5820K vs 25 MB (total) on the Xeon E5-2628L V3.

Feature	Core i7-5820K	Xeon E5-2628L V3
Cores / Threads	6 / 12	10 / 20+67%
Boost Clock	3.6 GHz+44%	2.5 GHz
Base Clock	3.3 GHz+65%	2 GHz
L3 Cache	15 MB (total)	25 MB (total)+67%
L2 Cache	256 kB (per core)	256K (per core)
Process	22 nm	22 nm
Architecture	Haswell-E (2014)	Haswell-EP (2014−2015)
PassMark	9,826	9,949+1%
Cinebench R23 Multi	5,700	—
Geekbench 6 Single	1,134	—
Geekbench 6 Multi	5,383	—

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Memory & Platform

The Core i7-5820K uses the LGA2011 socket (PCIe 3.0), while the Xeon E5-2628L V3 uses LGA2011-3 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Core i7-5820K	Xeon E5-2628L V3
Socket	LGA2011	LGA2011-3
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR4-2133	—
Max RAM Capacity	64 GB	—
RAM Channels	4	—
ECC Support	No	—
PCIe Lanes	28	—

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Advanced Features

Virtualization: Yes (Core i7-5820K) / not specified (Xeon E5-2628L V3). Primary use case: Core i7-5820K targets Enthusiast Workstation. Direct competitor: Core i7-5820K rivals Ryzen 5 1600.