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.

Head-to-Head Verdict, Benchmarks, Value & Long-Term Outlook

This comparison brings together gaming FPS, productivity performance, platform differences, power efficiency, pricing context, and upgrade path so you can see which CPU actually makes more sense.

Core i5-9400

2019

Why buy it

✅Costs $217 less on MSRP ($192 MSRP vs $409 MSRP).
✅Draws 65W instead of 125W, a 60W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Core i7-12700K across 50 shared CPU benchmark tests.
❌Lower PassMark (9,372 vs 34,347).
❌Smaller total L3 cache (9 MB vs 25 MB).
❌Lower PassMark per dollar, at 48.8 vs 84.0 PassMark/$ ($192 MSRP vs $409 MSRP).
❌Older platform position on LGA1151 with DDR4, while Core i7-12700K moves to LGA1700 and DDR5.

Core i7-12700K

2021

Why buy it

✅Better for gaming: +95.4% higher average FPS across 50 shared CPU benchmark tests.
✅+177.8% larger total L3 cache (25 MB vs 9 MB).
✅Delivers 72.0% more PassMark for each dollar spent, at 84.0 vs 48.8 PassMark/$ ($409 MSRP vs $192 MSRP).
✅Newer platform on LGA1700 with DDR5 support instead of LGA1151 and DDR4.
✅25% more PCIe lanes (20 vs 16) for storage and expansion-heavy builds.

Trade-offs

❌
113% HIGHER MSRP
$409 MSRPvs$192 MSRP
❌92.3% higher power demand at 125W vs 65W.

Core i5-9400

2019

Core i7-12700K

2021

Why buy it

✅Costs $217 less on MSRP ($192 MSRP vs $409 MSRP).
✅Draws 65W instead of 125W, a 60W reduction.

Why buy it

✅Better for gaming: +95.4% higher average FPS across 50 shared CPU benchmark tests.
✅+177.8% larger total L3 cache (25 MB vs 9 MB).
✅Delivers 72.0% more PassMark for each dollar spent, at 84.0 vs 48.8 PassMark/$ ($409 MSRP vs $192 MSRP).
✅Newer platform on LGA1700 with DDR5 support instead of LGA1151 and DDR4.
✅25% more PCIe lanes (20 vs 16) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Core i7-12700K across 50 shared CPU benchmark tests.
❌Lower PassMark (9,372 vs 34,347).
❌Smaller total L3 cache (9 MB vs 25 MB).
❌Lower PassMark per dollar, at 48.8 vs 84.0 PassMark/$ ($192 MSRP vs $409 MSRP).
❌Older platform position on LGA1151 with DDR4, while Core i7-12700K moves to LGA1700 and DDR5.

Trade-offs

❌
113% HIGHER MSRP
$409 MSRPvs$192 MSRP
❌92.3% higher power demand at 125W vs 65W.

Quick Answers

So, is Core i7-12700K better than Core i5-9400?

Yes. Core i7-12700K is the better overall CPU here. You are getting a 95.4% average FPS lead across 50 shared CPU game tests in our data, 266.5% better PassMark, and the stronger long-term platform, which makes it the stronger all-around choice.

Which one is better for gaming?

If gaming is the priority, Core i7-12700K is the better pick here. According to our tests, it delivers 95.4% 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 i7-12700K is the better fit. You are getting 266.5% better PassMark, backed by 12 cores and 20 threads. It also carries the larger cache pool with 177.8% larger total L3 cache (25 MB vs 9 MB).

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

Core i7-12700K is the smarter buy today. Core i7-12700K is 113.0% more expensive on MSRP at $409 MSRP versus $192 MSRP, and it gives you a 95.4% average FPS lead across 50 shared CPU game tests in our data. It is also 72.0% better value on MSRP (84.0 vs 48.8 PassMark/$), so the better CPU is not just faster, it is also the cleaner value play on paper.

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

Core i7-12700K is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2021 vs 2019), a healthier platform with LGA1700 and DDR5 instead of LGA1151, 177.8% larger total L3 cache (25 MB vs 9 MB), and more multi-core headroom with 12 cores / 20 threads instead of 6/6. That should give you a better long-term upgrade path for motherboard, RAM, and future CPU swaps.

Games Benchmarks

Paired with RTX 4090

To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.

Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.

Core i5-9400 Benchmark Check

Core i7-12700K Benchmark Check

Path of Exile 2

Preset	Core i5-9400	Core i7-12700K
1080p
low	179 FPS	314 FPS
medium	144 FPS	295 FPS
high	115 FPS	246 FPS
ultra	91 FPS	193 FPS
1440p
low	152 FPS	269 FPS
medium	122 FPS	225 FPS
high	96 FPS	182 FPS
ultra	75 FPS	145 FPS
4K
low	71 FPS	170 FPS
medium	61 FPS	142 FPS
high	48 FPS	109 FPS
ultra	37 FPS	96 FPS

Open Core i5-9400 Open Core i7-12700K

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i5-9400	Core i7-12700K
1080p
low	234 FPS	630 FPS
medium	234 FPS	533 FPS
high	234 FPS	450 FPS
ultra	222 FPS	410 FPS
1440p
low	234 FPS	536 FPS
medium	234 FPS	475 FPS
high	226 FPS	403 FPS
ultra	202 FPS	349 FPS
4K
low	234 FPS	312 FPS
medium	216 FPS	280 FPS
high	196 FPS	266 FPS
ultra	170 FPS	234 FPS

Open Core i5-9400 Open Core i7-12700K

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i5-9400	Core i7-12700K
1080p
low	234 FPS	797 FPS
medium	234 FPS	633 FPS
high	234 FPS	556 FPS
ultra	234 FPS	472 FPS
1440p
low	234 FPS	704 FPS
medium	234 FPS	565 FPS
high	234 FPS	490 FPS
ultra	234 FPS	422 FPS
4K
low	234 FPS	510 FPS
medium	226 FPS	425 FPS
high	192 FPS	381 FPS
ultra	152 FPS	321 FPS

Open Core i5-9400 Open Core i7-12700K

League of Legends

League of Legends

Valorant

Preset	Core i5-9400	Core i7-12700K
1080p
low	234 FPS	859 FPS
medium	234 FPS	802 FPS
high	234 FPS	699 FPS
ultra	234 FPS	628 FPS
1440p
low	234 FPS	760 FPS
medium	234 FPS	678 FPS
high	234 FPS	590 FPS
ultra	234 FPS	519 FPS
4K
low	234 FPS	535 FPS
medium	234 FPS	488 FPS
high	234 FPS	437 FPS
ultra	234 FPS	384 FPS

Open Core i5-9400 Open Core i7-12700K

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i5-9400 and Core i7-12700K

Core i5-9400

The Core i5-9400 is manufactured by Intel. It was released in 19 October 2018 (7 years ago). It is based on the Coffee Lake (2017−2019) architecture. It features 6 cores and 6 threads. Base frequency is 2.9 GHz, with boost up to 4.1 GHz. L3 cache: 9 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 65 Watt. Memory support: DDR4-2666. Passmark benchmark score: 9,372 points. Launch price was $182.

Core i7-12700K

The Core i7-12700K is manufactured by Intel. It was released in 4 November 2021 (4 years ago). It is based on the Alder Lake, Golden Cove, Gracemont (2021) architecture. It features 12 cores and 20 threads. Base frequency is 3.6 GHz, with boost up to 5 GHz. L3 cache: 25 MB (total). L2 cache: 1.25 MB (per core). Built on 10 nm process technology. Socket: LGA1700. Thermal design power (TDP): 125 Watt. Memory support: DDR4, DDR5. Passmark benchmark score: 34,347 points. Launch price was $409.

⚡

Processing Power

The Core i5-9400 packs 6 cores / 6 threads, while the Core i7-12700K offers 12 cores / 20 threads — the Core i7-12700K has 6 more cores. Boost clocks reach 4.1 GHz on the Core i5-9400 versus 5 GHz on the Core i7-12700K — a 19.8% clock advantage for the Core i7-12700K (base: 2.9 GHz vs 3.6 GHz). The Core i5-9400 uses the Coffee Lake (2017−2019) architecture (14 nm), while the Core i7-12700K uses Alder Lake, Golden Cove, Gracemont (2021) (10 nm). In PassMark, the Core i5-9400 scores 9,372 against the Core i7-12700K's 34,347 — a 114.3% lead for the Core i7-12700K. L3 cache: 9 MB (total) on the Core i5-9400 vs 25 MB (total) on the Core i7-12700K.

Feature	Core i5-9400	Core i7-12700K
Cores / Threads	6 / 6	12 / 20+100%
Boost Clock	4.1 GHz	5 GHz+22%
Base Clock	2.9 GHz	3.6 GHz+24%
L3 Cache	9 MB (total)	25 MB (total)+178%
L2 Cache	256K (per core)	1.25 MB (per core)+400%
Process	14 nm	10 nm-29%
Architecture	Coffee Lake (2017−2019)	Alder Lake, Golden Cove, Gracemont (2021)
PassMark	9,372	34,347+266%

🧠

Memory & Platform

The Core i5-9400 uses the LGA1151 socket (PCIe 3.0), while the Core i7-12700K uses LGA1700 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2666 on the Core i5-9400 versus 4800 on the Core i7-12700K — the Core i7-12700K supports 199.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 128 GB of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Core i5-9400) vs 20 (Core i7-12700K) — the Core i7-12700K offers 4 more lanes for additional GPUs or NVMe drives.

Feature	Core i5-9400	Core i7-12700K
Socket	LGA1151	LGA1700
PCIe Generation	PCIe 3.0	PCIe 5.0+67%
Max RAM Speed	DDR4-2666	4800+119900%
Max RAM Capacity	128 GB+104857500%	128
RAM Channels	2	2
ECC Support	No	Yes
PCIe Lanes	16	20+25%

🔧

Advanced Features

Only the Core i7-12700K has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Both support VT-x, VT-d virtualization. Both include integrated graphics — UHD Graphics 630 (Core i5-9400) and Intel UHD Graphics 770 (Core i7-12700K) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i5-9400 targets Desktop. Direct competitor: Core i7-12700K rivals Ryzen 7 5800X.

Feature	Core i5-9400	Core i7-12700K
Integrated GPU	Yes	Yes
IGPU Model	UHD Graphics 630	Intel UHD Graphics 770
Unlocked	No	Yes
AVX-512	No	No
Virtualization	VT-x, VT-d	VT-x, VT-d
Target Use	Desktop	—

💰

Value Analysis

The Core i5-9400 launched at $192 MSRP, while the Core i7-12700K debuted at $409. On MSRP ($192 vs $409), the Core i5-9400 is $217 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i5-9400 delivers 48.8 pts/$ vs 84.0 pts/$ for the Core i7-12700K — making the Core i7-12700K the 53% better value option.