Core i7-8665UE vs FX-8140

Core i7-8665UE vs FX-8140 Performance Spectrum

Core i7-8665UE

4 / 8

4,852

0.0%

4,860

+0.2%

FX-4130

FX-7500

Athlon X4 845

Ryzen Embedded R1606G

Ryzen 9 PRO 6950H

Ryzen AI Max PRO 390

Ryzen 9 9955HX3D

Ryzen Threadripper PRO 7965WX

About PassMark

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 i7-8665UE vs FX-8140 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 i7-8665UE vs FX-8140: Pros, Cons & Final Verdict

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

Core i7-8665UE

2018

Why buy it

✅Draws 15W instead of 95W, a 80W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with UHD Graphics 620, while FX-8140 needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than FX-8140 across 50 shared CPU benchmark tests.
❌Lower PassMark (4,852 vs 4,860).
❌Lower PassMark per dollar, at 11.9 vs 21.6 PassMark/$ ($409 MSRP vs $225 MSRP).

FX-8140

2012

Why buy it

✅Better for gaming: +4.3% higher average FPS across 50 shared CPU benchmark tests.
✅Costs $184 less on MSRP ($225 MSRP vs $409 MSRP).
✅Delivers 82.1% more PassMark for each dollar spent, at 21.6 vs 11.9 PassMark/$ ($225 MSRP vs $409 MSRP).

Trade-offs

❌533.3% higher power demand at 95W vs 15W.
❌No integrated graphics, while Core i7-8665UE can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is FX-8140 better than Core i7-8665UE?

Yes. FX-8140 is the better all-around CPU here. It gives you a 4.3% average FPS lead across 50 shared CPU game tests in our data and 0.2% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, FX-8140 is the better pick. According to our tests, it delivers 4.3% 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, FX-8140 is the stronger fit. You are getting 0.2% better PassMark, backed by 8 cores and 8 threads.

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

FX-8140 is the better buy right now. FX-8140 comes in $184 cheaper on MSRP at $225 MSRP versus $409 MSRP, and it still gives you a 4.3% average FPS lead across 50 shared CPU game tests in our data. It is also 82.1% better value on MSRP (21.6 vs 11.9 PassMark/$), 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 i7-8665UE makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2018 vs 2012). That makes it the safer long-term bet.

Core i7-8665UE vs FX-8140 Technical Specifications

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

Core i7-8665UE

The Core i7-8665UE is manufactured by Intel. It was released in 1 October 2018 (7 years ago). It is based on the Whiskey Lake-U (2018−2019) architecture. It features 4 cores and 8 threads. Base frequency is 1.7 GHz, with boost up to 4.4 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: FCBGA1528. Thermal design power (TDP): 15 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 4,852 points. Launch price was $409.

FX-8140

The FX-8140 is manufactured by AMD. It was released in 23 October 2012 (13 years ago). It is based on the Zambezi (2011−2012) architecture. It features 8 cores and 8 threads. Base frequency is 3.2 GHz, with boost up to 4.1 GHz. L3 cache: 8 MB (total). L2 cache: 8 MB. Built on 32 nm process technology. Socket: AM3+. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 4,860 points. Launch price was $69.

⚡

Processing Power

The Core i7-8665UE packs 4 cores / 8 threads, while the FX-8140 offers 8 cores / 8 threads — the FX-8140 has 4 more cores. Boost clocks reach 4.4 GHz on the Core i7-8665UE versus 4.1 GHz on the FX-8140 — a 7.1% clock advantage for the Core i7-8665UE (base: 1.7 GHz vs 3.2 GHz). The Core i7-8665UE uses the Whiskey Lake-U (2018−2019) architecture (14 nm), while the FX-8140 uses Zambezi (2011−2012) (32 nm). In PassMark, the Core i7-8665UE scores 4,852 against the FX-8140's 4,860 — a 0.2% lead for the FX-8140. Both processors carry 8 MB (total) of L3 cache.

Feature	Core i7-8665UE	FX-8140
Cores / Threads	4 / 8	8 / 8+100%
Boost Clock	4.4 GHz+7%	4.1 GHz
Base Clock	1.7 GHz	3.2 GHz+88%
L3 Cache	8 MB (total)	8 MB (total)
L2 Cache	256 kB (per core)	8 MB+3100%
Process	14 nm-56%	32 nm
Architecture	Whiskey Lake-U (2018−2019)	Zambezi (2011−2012)
PassMark	4,852	4,860

🧠

Memory & Platform

The Core i7-8665UE uses the FCBGA1528 socket (PCIe 3.0), while the FX-8140 uses AM3+ (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Core i7-8665UE	FX-8140
Socket	FCBGA1528	AM3+
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	DDR4-2400	—
Max RAM Capacity	64 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—

🔧

Advanced Features

Virtualization: VT-x, VT-d (Core i7-8665UE) / not specified (FX-8140). The Core i7-8665UE includes integrated graphics (UHD Graphics 620), while the FX-8140 requires a dedicated GPU. Primary use case: Core i7-8665UE targets Embedded.

Feature	Core i7-8665UE	FX-8140
Integrated GPU	Yes	—
IGPU Model	UHD Graphics 620	—
Unlocked	No	—
AVX-512	No	—
Virtualization	VT-x, VT-d	—
Target Use	Embedded	—

💰

Value Analysis

At launch, the Core i7-8665UE was priced at $409, while the FX-8140 came in at $225. On launch pricing ($409 vs $225), FX-8140 was $184 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i7-8665UE delivers 11.9 pts/$ vs 21.6 pts/$ for the FX-8140 — making the FX-8140 the 58.2% better value option.

Feature	Core i7-8665UE	FX-8140
MSRP	$409	$225-45%
Performance per Dollar	11.9	21.6+82%
Release Date	2018	2012

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