Xeon E-2126G vs Xeon E5-4640 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.

Xeon E-2126G vs Xeon E5-4640 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.

Xeon E-2126G vs Xeon E5-4640 v3: Pros, Cons & Final Verdict

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

Xeon E-2126G

2018

Why buy it

✅+0.6% higher PassMark.
✅Costs $157 less on MSRP ($2,702 MSRP vs $2,859 MSRP).
✅Draws 80W instead of 105W, a 25W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon E5-4640 v3 across 50 shared CPU benchmark tests.
❌Smaller total L3 cache (12 MB vs 30 MB).

Xeon E5-4640 v3

2015

Why buy it

✅Better for gaming: +21.0% higher average FPS across 50 shared CPU benchmark tests.
✅+150% larger total L3 cache (30 MB vs 12 MB).
✅100+% more PCIe lanes (40 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (10,372 vs 10,437).
❌
5.8% HIGHER MSRP
$2,859 MSRPvs$2,702 MSRP
❌31.3% higher power demand at 105W vs 80W.

Quick Answers

So, is Xeon E-2126G better than Xeon E5-4640 v3?

It depends on what you want from the system. For gaming, Xeon E5-4640 v3 is ahead with a 21.0% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Xeon E-2126G pulls ahead with 0.6% better PassMark. Xeon E5-4640 v3 also has the bigger cache pool with 150% larger total L3 cache (30 MB vs 12 MB).

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

For streaming, content creation, and heavier multitasking, Xeon E-2126G is the stronger fit. You are getting 0.6% better PassMark, backed by 6 cores and 6 threads.

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

Xeon E-2126G is the better buy right now. Xeon E-2126G comes in $157 cheaper on MSRP at $2,702 MSRP versus $2,859 MSRP, and it still gives you 0.6% better PassMark. The compromise is that Xeon E5-4640 v3 is still the better pure gaming CPU with a 21.0% average FPS lead across 50 shared CPU game tests in our data. It is also 6.5% better value on MSRP (3.9 vs 3.6 PassMark/$), 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 E-2126G makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2018 vs 2015) and more multi-core headroom with 6 cores / 6 threads instead of 12/24. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Xeon E-2126G vs Xeon E5-4640 v3 Technical Specifications

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

Xeon E-2126G

The Xeon E-2126G is manufactured by Intel. It was released in 12 July 2018 (7 years ago). It is based on the Coffee Lake-S WS (2018−2019) architecture. It features 6 cores and 6 threads. Base frequency is 3.3 GHz, with boost up to 4.5 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 80 Watt. Memory support: DDR4-2666. Passmark benchmark score: 10,437 points. Launch price was $255.

Xeon E5-4640 v3

The Xeon E5-4640 v3 is manufactured by Intel. It was released in 2015-01-01. It is based on the Haswell-EP (2014−2015) architecture. It features 12 cores and 24 threads. Base frequency is 1.9 GHz, with boost up to 2.6 GHz. L3 cache: 30 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: LGA2011. Thermal design power (TDP): 105 Watt. Memory support: DDR4. Passmark benchmark score: 10,372 points. Launch price was $800.

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Processing Power

The Xeon E-2126G packs 6 cores / 6 threads, while the Xeon E5-4640 v3 offers 12 cores / 24 threads — the Xeon E5-4640 v3 has 6 more cores. Boost clocks reach 4.5 GHz on the Xeon E-2126G versus 2.6 GHz on the Xeon E5-4640 v3 — a 53.5% clock advantage for the Xeon E-2126G (base: 3.3 GHz vs 1.9 GHz). The Xeon E-2126G uses the Coffee Lake-S WS (2018−2019) architecture (14 nm), while the Xeon E5-4640 v3 uses Haswell-EP (2014−2015) (22 nm). In PassMark, the Xeon E-2126G scores 10,437 against the Xeon E5-4640 v3's 10,372 — a 0.6% lead for the Xeon E-2126G. L3 cache: 12 MB (total) on the Xeon E-2126G vs 30 MB (total) on the Xeon E5-4640 v3.

Feature	Xeon E-2126G	Xeon E5-4640 v3
Cores / Threads	6 / 6	12 / 24+100%
Boost Clock	4.5 GHz+73%	2.6 GHz
Base Clock	3.3 GHz+74%	1.9 GHz
L3 Cache	12 MB (total)	30 MB (total)+150%
L2 Cache	256 kB (per core)	256K (per core)
Process	14 nm-36%	22 nm
Architecture	Coffee Lake-S WS (2018−2019)	Haswell-EP (2014−2015)
PassMark	10,437	10,372
Geekbench 6 Single	—	750
Geekbench 6 Multi	—	7,000

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Memory & Platform

The Xeon E-2126G uses the LGA1151 socket (PCIe 3.0), while the Xeon E5-4640 v3 uses LGA2011 (PCIe 5.0) — making them incompatible on the same motherboard.

Feature	Xeon E-2126G	Xeon E5-4640 v3
Socket	LGA1151	LGA2011
PCIe Generation	PCIe 3.0	PCIe 5.0+67%
Max RAM Speed	—	DDR4-1866
Max RAM Capacity	—	768 GB
RAM Channels	—	4
ECC Support	—	Yes
PCIe Lanes	—	40

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Advanced Features

Virtualization: not specified (Xeon E-2126G) / Yes (Xeon E5-4640 v3).

Feature	Xeon E-2126G	Xeon E5-4640 v3
Integrated GPU	—	No
AVX-512	—	No
Virtualization	—	Yes

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Value Analysis

At launch, the Xeon E-2126G was priced at $2702, while the Xeon E5-4640 v3 came in at $2859. On launch pricing ($2702 vs $2859), Xeon E-2126G was $157 cheaper. In terms of value on MSRP (PassMark points per dollar), the Xeon E-2126G delivers 3.9 pts/$ vs 3.6 pts/$ for the Xeon E5-4640 v3 — making the Xeon E-2126G the 6.3% better value option.

Feature	Xeon E-2126G	Xeon E5-4640 v3
MSRP	$2702-5%	$2859
Performance per Dollar	3.9+8%	3.6
Release Date	2018	2015

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