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 i7-9700K vs Xeon E5645 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 i7-9700K vs Xeon E5645: Pros, Cons & Final Verdict

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

Core i7-9700K

2018

Why buy it

✅Better for gaming: +120.8% higher average FPS across 50 shared CPU benchmark tests.
✅Delivers 122.5% more PassMark for each dollar spent, at 37.4 vs 16.8 PassMark/$ ($385 MSRP vs $294 MSRP).
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with UHD Graphics 630, while Xeon E5645 needs a discrete GPU.

Trade-offs

❌Less compelling for workstation-style loads than Xeon E5645, which brings 6 cores / 12 threads.
❌
31% HIGHER MSRP
$385 MSRPvs$294 MSRP
❌18.8% higher power demand at 95W vs 80W.

Xeon E5645

2010

Why buy it

✅Better for workstations and heavier parallel workloads: 6 cores / 12 threads.
✅Costs $91 less on MSRP ($294 MSRP vs $385 MSRP).
✅Draws 80W instead of 95W, a 15W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Core i7-9700K across 50 shared CPU benchmark tests.
❌Lower PassMark (4,942 vs 14,397).
❌Lower PassMark per dollar, at 16.8 vs 37.4 PassMark/$ ($294 MSRP vs $385 MSRP).
❌No integrated graphics, while Core i7-9700K can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core i7-9700K better than Xeon E5645?

Not really, because they are built for different jobs. Xeon E5645 makes more sense for workstation-style multi-core throughput, while Core i7-9700K is the more practical desktop choice for gaming, platform cost, and everyday use.

Which one is better for gaming?

If gaming is the priority, Core i7-9700K is the better pick. According to our tests, it delivers 120.8% 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, Core i7-9700K is the stronger fit. You are getting 191.3% better PassMark, backed by 8 cores and 8 threads.

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

Core i7-9700K is the better buy right now. Core i7-9700K comes in 31.0% more expensive on MSRP at $385 MSRP versus $294 MSRP, and it still gives you a 120.8% average FPS lead across 50 shared CPU game tests in our data. It is also 122.5% better value on MSRP (37.4 vs 16.8 PassMark/$), 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 i7-9700K makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2018 vs 2010) and more multi-core headroom with 8 cores / 8 threads instead of 6/12. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core i7-9700K vs Xeon E5645 Technical Specifications

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

Core i7-9700K

The Core i7-9700K 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 8 threads. Base frequency is 3.6 GHz, with boost up to 4.9 GHz. L3 cache: 12 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: 14,397 points. Launch price was $374.

Xeon E5645

The Xeon E5645 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 2.4 GHz, with boost up to 2.67 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 80 Watt. Memory support: DDR3. Passmark benchmark score: 4,942 points. Launch price was $294.

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Processing Power

The Core i7-9700K packs 8 cores / 8 threads, while the Xeon E5645 offers 6 cores / 12 threads — the Core i7-9700K has 2 more cores. Boost clocks reach 4.9 GHz on the Core i7-9700K versus 2.67 GHz on the Xeon E5645 — a 58.9% clock advantage for the Core i7-9700K (base: 3.6 GHz vs 2.4 GHz). The Core i7-9700K uses the Coffee Lake-R (2018−2019) architecture (14 nm), while the Xeon E5645 uses Westmere-EP (2010−2011) (32 nm). In PassMark, the Core i7-9700K scores 14,397 against the Xeon E5645's 4,942 — a 97.8% lead for the Core i7-9700K. Both processors carry 12 MB (total) of L3 cache.

Feature	Core i7-9700K	Xeon E5645
Cores / Threads	8 / 8+33%	6 / 12
Boost Clock	4.9 GHz+84%	2.67 GHz
Base Clock	3.6 GHz+50%	2.4 GHz
L3 Cache	12 MB (total)	12 MB (total)
L2 Cache	256K (per core)	256 kB (per core)
Process	14 nm-56%	32 nm
Architecture	Coffee Lake-R (2018−2019)	Westmere-EP (2010−2011)
PassMark	14,397+191%	4,942

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Memory & Platform

The Core i7-9700K uses the LGA1151 socket (PCIe 3.0), while the Xeon E5645 uses LGA1366 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2666 on the Core i7-9700K versus DDR3-1333 on the Xeon E5645 — the Core i7-9700K supports 100% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon E5645 supports up to 288 GB of RAM compared to 128 GB — 125% more capacity for professional workloads. Memory channels: 2 (Core i7-9700K) vs 3 (Xeon E5645). PCIe lanes: 16 (Core i7-9700K) vs 0 (Xeon E5645) — the Core i7-9700K offers 16 more lanes for additional GPUs or NVMe drives.

Feature	Core i7-9700K	Xeon E5645
Socket	LGA1151	LGA1366
PCIe Generation	PCIe 3.0	PCIe 5.0+67%
Max RAM Speed	DDR4-2666+100%	DDR3-1333
Max RAM Capacity	128 GB	288 GB+125%
RAM Channels	2	3+50%
ECC Support	No	Yes
PCIe Lanes	16	0

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Advanced Features

Only the Core i7-9700K has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: VT-x, VT-d (Core i7-9700K) vs VT-x (Xeon E5645). The Core i7-9700K includes integrated graphics (UHD Graphics 630), while the Xeon E5645 requires a dedicated GPU. Primary use case: Core i7-9700K targets Desktop, Xeon E5645 targets Server.

Feature	Core i7-9700K	Xeon E5645
Integrated GPU	Yes	No
IGPU Model	UHD Graphics 630	—
Unlocked	Yes	No
AVX-512	No	No
Virtualization	VT-x, VT-d	VT-x
Target Use	Desktop	Server

💰

Value Analysis

At launch, the Core i7-9700K was priced at $385, while the Xeon E5645 came in at $294. On launch pricing ($385 vs $294), Xeon E5645 was $91 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i7-9700K delivers 37.4 pts/$ vs 16.8 pts/$ for the Xeon E5645 — making the Core i7-9700K the 76% better value option.

Feature	Core i7-9700K	Xeon E5645
MSRP	$385	$294-24%
Performance per Dollar	37.4+123%	16.8
Release Date	2018	2010

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