Core i7-5820K vs Xeon E7450

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 E7450 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 E7450: 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

✅Better for gaming: +6.0% higher average FPS across 50 shared CPU benchmark tests.
✅+25% larger total L3 cache (15 MB vs 12 MB).
✅Costs $28 less on MSRP ($389 MSRP vs $417 MSRP).
✅100+% more PCIe lanes (28 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (9,826 vs 9,932).
❌55.6% higher power demand at 140W vs 90W.

Xeon E7450

2008

Why buy it

✅+1.1% higher PassMark.
✅Draws 90W instead of 140W, a 50W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Core i7-5820K across 50 shared CPU benchmark tests.
❌Smaller total L3 cache (12 MB vs 15 MB).
❌
7.2% HIGHER MSRP
$417 MSRPvs$389 MSRP

Quick Answers

So, is Core i7-5820K better than Xeon E7450?

Not really, because they are built for different jobs. Xeon E7450 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 streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Xeon E7450 is the stronger fit. You are getting 1.1% better PassMark.

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

Core i7-5820K is the better buy right now. Core i7-5820K comes in $28 cheaper on MSRP at $389 MSRP versus $417 MSRP, and it still gives you a 6.0% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Xeon E7450 is still stronger for heavier multi-core work with 1.1% better PassMark. It is also 6.1% better value on MSRP (25.3 vs 23.8 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Core i7-5820K makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2014 vs 2008) and 25% larger total L3 cache (15 MB vs 12 MB). That makes it the safer long-term bet.

Core i7-5820K vs Xeon E7450 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 E7450

The Xeon E7450 is manufactured by Intel. It was released in 2015-01-01. Base frequency: 2.4 GHz. L3 cache: 12 MB L3 Cache. Built on 45 nm process technology. Socket: PGA604. Thermal design power (TDP): 90 Watt. Passmark benchmark score: 9,932 points. Launch price was $800.

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Processing Power

The Core i7-5820K is built on the Haswell-E (2014) architecture. In PassMark, the Core i7-5820K scores 9,826 against the Xeon E7450's 9,932 — a 1.1% lead for the Xeon E7450. L3 cache: 15 MB (total) on the Core i7-5820K vs 12 MB L3 Cache on the Xeon E7450.

Feature	Core i7-5820K	Xeon E7450
Cores / Threads	6 / 12	—
Boost Clock	3.6 GHz	—
Base Clock	3.3 GHz+38%	2.4 GHz
L3 Cache	15 MB (total)+25%	12 MB L3 Cache
L2 Cache	256 kB (per core)	—
Process	22 nm-51%	45 nm
Architecture	Haswell-E (2014)	—
PassMark	9,826	9,932+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 E7450 uses PGA604 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Core i7-5820K	Xeon E7450
Socket	LGA2011	PGA604
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
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 E7450). Primary use case: Core i7-5820K targets Enthusiast Workstation. Direct competitor: Core i7-5820K rivals Ryzen 5 1600.

Feature	Core i7-5820K	Xeon E7450
Integrated GPU	No	—
Unlocked	Yes	—
AVX-512	No	—
Virtualization	Yes	—
Target Use	Enthusiast Workstation	—

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Value Analysis

At launch, the Core i7-5820K was priced at $389, while the Xeon E7450 came in at $417. On launch pricing ($389 vs $417), Core i7-5820K was $28 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i7-5820K delivers 25.3 pts/$ vs 23.8 pts/$ for the Xeon E7450 — making the Core i7-5820K the 5.9% better value option.

Feature	Core i7-5820K	Xeon E7450
MSRP	$389-7%	$417
Performance per Dollar	25.3+6%	23.8
Release Date	2014	2008

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