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 i9-9900K vs Xeon E5-2686 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 i9-9900K vs Xeon E5-2686 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 i9-9900K

2018

Why buy it

✅Better for gaming: +26.8% higher average FPS across 50 shared CPU benchmark tests.
✅Costs $1,012 less on MSRP ($488 MSRP vs $1,500 MSRP).
✅Delivers 206.7% more PassMark for each dollar spent, at 37.1 vs 12.1 PassMark/$ ($488 MSRP vs $1,500 MSRP).
✅Draws 95W instead of 120W, a 25W reduction.
✅Integrated graphics onboard with Intel UHD Graphics 630, while Xeon E5-2686 V3 needs a discrete GPU.

Trade-offs

❌Lower PassMark (18,109 vs 18,148).
❌Smaller total L3 cache (16 MB vs 45 MB).
❌Less compelling for workstation-style loads than Xeon E5-2686 V3, which brings 18 cores / 36 threads and 40 PCIe lanes.

Xeon E5-2686 V3

2014

Why buy it

✅+0.2% higher PassMark.
✅+181.3% larger total L3 cache (45 MB vs 16 MB).
✅Better for workstations and heavier parallel workloads: 18 cores / 36 threads, plus 40 PCIe lanes vs 16.
✅150% more PCIe lanes (40 vs 16) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Core i9-9900K across 50 shared CPU benchmark tests.
❌Lower PassMark per dollar, at 12.1 vs 37.1 PassMark/$ ($1,500 MSRP vs $488 MSRP).
❌26.3% higher power demand at 120W vs 95W.
❌No integrated graphics, while Core i9-9900K can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core i9-9900K better than Xeon E5-2686 V3?

Not really, because they are built for different jobs. Xeon E5-2686 V3 makes more sense for workstation-style multi-core throughput, while Core i9-9900K 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 E5-2686 V3 is the stronger fit. You are getting 0.2% better PassMark, backed by 18 cores and 36 threads. It also has the larger cache pool with 181.3% larger total L3 cache (45 MB vs 16 MB).

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

Core i9-9900K is the better buy right now. Core i9-9900K comes in $1,012 cheaper on MSRP at $488 MSRP versus $1,500 MSRP, and it still gives you a 26.8% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Xeon E5-2686 V3 is still stronger for heavier multi-core work with 0.2% better PassMark. It is also 206.7% better value on MSRP (37.1 vs 12.1 PassMark/$), 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 i9-9900K makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2018 vs 2014). That makes it the safer long-term bet.

Core i9-9900K vs Xeon E5-2686 V3 Technical Specifications

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

Core i9-9900K

The Core i9-9900K is manufactured by Intel. It was released in 19 October 2018 (7 years ago). It is based on the Coffee Lake-R (2018−2019) architecture. It features 8 cores and 16 threads. Base frequency is 3.6 GHz, with boost up to 5 GHz. L3 cache: 16 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 95 Watt. Memory support: DDR4. Passmark benchmark score: 18,109 points. Launch price was $488.

Xeon E5-2686 V3

The Xeon E5-2686 V3 is manufactured by Intel. It was released in 2015-01-01. It is based on the Haswell-EP (2014−2015) architecture. It features 18 cores and 36 threads. Base frequency is 2 GHz, with boost up to 3.5 GHz. L3 cache: 45 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: LGA2011-3. Thermal design power (TDP): 120 Watt. Memory support: DDR3, DDR4 2133 MHz Quad-channel. Passmark benchmark score: 18,148 points. Launch price was $800.

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Processing Power

The Core i9-9900K packs 8 cores / 16 threads, while the Xeon E5-2686 V3 offers 18 cores / 36 threads — the Xeon E5-2686 V3 has 10 more cores. Boost clocks reach 5 GHz on the Core i9-9900K versus 3.5 GHz on the Xeon E5-2686 V3 — a 35.3% clock advantage for the Core i9-9900K (base: 3.6 GHz vs 2 GHz). The Core i9-9900K uses the Coffee Lake-R (2018−2019) architecture (14 nm), while the Xeon E5-2686 V3 uses Haswell-EP (2014−2015) (22 nm). In PassMark, the Core i9-9900K scores 18,109 against the Xeon E5-2686 V3's 18,148 — a 0.2% lead for the Xeon E5-2686 V3. L3 cache: 16 MB (total) on the Core i9-9900K vs 45 MB (total) on the Xeon E5-2686 V3.

Feature	Core i9-9900K	Xeon E5-2686 V3
Cores / Threads	8 / 16	18 / 36+125%
Boost Clock	5 GHz+43%	3.5 GHz
Base Clock	3.6 GHz+80%	2 GHz
L3 Cache	16 MB (total)	45 MB (total)+181%
L2 Cache	256K (per core)	256K (per core)
Process	14 nm-36%	22 nm
Architecture	Coffee Lake-R (2018−2019)	Haswell-EP (2014−2015)
PassMark	18,109	18,148
Cinebench R23 Multi	—	10,000
Geekbench 6 Single	—	1,033
Geekbench 6 Multi	—	8,649

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Memory & Platform

The Core i9-9900K uses the LGA1151 socket (PCIe 3.0), while the Xeon E5-2686 V3 uses LGA2011-3 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2666 on the Core i9-9900K versus DDR4-2133 on the Xeon E5-2686 V3 — the Core i9-9900K supports 25% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon E5-2686 V3 supports up to 768 GB of RAM compared to 128 GB — 500% more capacity for professional workloads. Memory channels: 2 (Core i9-9900K) vs 4 (Xeon E5-2686 V3). PCIe lanes: 16 (Core i9-9900K) vs 40 (Xeon E5-2686 V3) — the Xeon E5-2686 V3 offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel 300 series (Core i9-9900K) and C612,X99 (Xeon E5-2686 V3).

Feature	Core i9-9900K	Xeon E5-2686 V3
Socket	LGA1151	LGA2011-3
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR4-2666+25%	DDR4-2133
Max RAM Capacity	128 GB	768 GB+500%
RAM Channels	2	4+100%
ECC Support	No	Yes
PCIe Lanes	16	40+150%

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Advanced Features

Virtualization: not specified (Core i9-9900K) / Yes (Xeon E5-2686 V3). The Core i9-9900K includes integrated graphics (Intel UHD Graphics 630), while the Xeon E5-2686 V3 requires a dedicated GPU.

Feature	Core i9-9900K	Xeon E5-2686 V3
Integrated GPU	Yes	No
IGPU Model	Intel UHD Graphics 630	—
AVX-512	—	No
Virtualization	—	Yes

💰

Value Analysis

At launch, the Core i9-9900K was priced at $488, while the Xeon E5-2686 V3 came in at $1500. On launch pricing ($488 vs $1500), Core i9-9900K was $1012 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i9-9900K delivers 37.1 pts/$ vs 12.1 pts/$ for the Xeon E5-2686 V3 — making the Core i9-9900K the 101.7% better value option.

Feature	Core i9-9900K	Xeon E5-2686 V3
MSRP	$488-67%	$1500
Performance per Dollar	37.1+207%	12.1
Release Date	2018	2014

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