Core i5-12400F vs Phenom II X6 1055T (95W)

CPU

GPU

Core i5-12400F

6 Cores12 Thrd65 WWMax: 4.4 GHz2022

Popular choices:

•••••••••

Phenom II X6 1055T (95W)

6 Cores6 Thrd95 WWMax: 3.3 GHz2010

Popular choices:

i5-12400F•••••••••

Performance Spectrum - CPU

Core i5-12400F

6 / 12

19,532

+293.4%

Phenom II X6 1055T (95W)

6 / 6

4,965

0.0%

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.

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 i5-12400F

2022

Why buy it

✅Better for gaming: +142.9% higher average FPS across 50 shared CPU benchmark tests.
✅+200% larger total L3 cache (18 MB vs 6 MB).
✅Draws 65W instead of 95W, a 30W reduction.
✅Newer platform on LGA1700 with DDR5 support instead of AM3 and older memory support.
✅100+% more PCIe lanes (20 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Launch MSRP is still $174 MSRP, while Phenom II X6 1055T (95W) mostly shows up through inconsistent older-market listings.

Phenom II X6 1055T (95W)

2010

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 50 shared CPU benchmark tests.
❌Lower PassMark (4,965 vs 19,532).
❌Smaller total L3 cache (6 MB vs 18 MB).
❌46.2% higher power demand at 95W vs 65W.
❌Older platform position on AM3, while Core i5-12400F moves to LGA1700 and DDR5.

Core i5-12400F

2022

Phenom II X6 1055T (95W)

2010

Why buy it

✅Better for gaming: +142.9% higher average FPS across 50 shared CPU benchmark tests.
✅+200% larger total L3 cache (18 MB vs 6 MB).
✅Draws 65W instead of 95W, a 30W reduction.
✅Newer platform on LGA1700 with DDR5 support instead of AM3 and older memory support.
✅100+% more PCIe lanes (20 vs 0) for storage and expansion-heavy builds.

Why buy it

Trade-offs

❌Launch MSRP is still $174 MSRP, while Phenom II X6 1055T (95W) mostly shows up through inconsistent older-market listings.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 50 shared CPU benchmark tests.
❌Lower PassMark (4,965 vs 19,532).
❌Smaller total L3 cache (6 MB vs 18 MB).
❌46.2% higher power demand at 95W vs 65W.
❌Older platform position on AM3, while Core i5-12400F moves to LGA1700 and DDR5.

Quick Answers

So, is Core i5-12400F better than Phenom II X6 1055T (95W)?

Yes. Core i5-12400F is the better overall CPU here. You are getting a 142.9% average FPS lead across 50 shared CPU game tests in our data, 293.4% 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 i5-12400F is the better pick here. According to our tests, it delivers 142.9% 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 i5-12400F is the better fit. You are getting 293.4% better PassMark, backed by 6 cores and 12 threads. It also carries the larger cache pool with 200% larger total L3 cache (18 MB vs 6 MB).

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

Core i5-12400F is the smarter buy today. Core i5-12400F is at an unclear MSRP at $174 MSRP versus unclear MSRP, and it gives you a 142.9% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (112.3 vs 0.0 PassMark/$), 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 i5-12400F is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2022 vs 2010), a healthier platform with LGA1700 and DDR5 instead of AM3, 200% larger total L3 cache (18 MB vs 6 MB), and more multi-core headroom with 6 cores / 12 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 i5-12400F Benchmark Check

Phenom II X6 1055T (95W) Benchmark Check

Path of Exile 2

Preset	Core i5-12400F	Phenom II X6 1055T (95W)
1080p
low	183 FPS	124 FPS
medium	168 FPS	124 FPS
high	139 FPS	108 FPS
ultra	119 FPS	89 FPS
1440p
low	153 FPS	124 FPS
medium	132 FPS	113 FPS
high	106 FPS	88 FPS
ultra	89 FPS	72 FPS
4K
low	87 FPS	62 FPS
medium	81 FPS	56 FPS
high	64 FPS	43 FPS
ultra	49 FPS	34 FPS

Open Core i5-12400F Open Phenom II X6 1055T (95W)

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i5-12400F	Phenom II X6 1055T (95W)
1080p
low	471 FPS	124 FPS
medium	397 FPS	124 FPS
high	341 FPS	124 FPS
ultra	301 FPS	116 FPS
1440p
low	407 FPS	124 FPS
medium	351 FPS	124 FPS
high	309 FPS	124 FPS
ultra	265 FPS	104 FPS
4K
low	282 FPS	124 FPS
medium	248 FPS	117 FPS
high	229 FPS	98 FPS
ultra	196 FPS	72 FPS

Open Core i5-12400F Open Phenom II X6 1055T (95W)

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i5-12400F	Phenom II X6 1055T (95W)
1080p
low	488 FPS	124 FPS
medium	488 FPS	124 FPS
high	488 FPS	124 FPS
ultra	488 FPS	124 FPS
1440p
low	488 FPS	124 FPS
medium	488 FPS	124 FPS
high	485 FPS	124 FPS
ultra	434 FPS	124 FPS
4K
low	442 FPS	124 FPS
medium	389 FPS	124 FPS
high	337 FPS	124 FPS
ultra	274 FPS	124 FPS

Open Core i5-12400F Open Phenom II X6 1055T (95W)

League of Legends

League of Legends

Valorant

Preset	Core i5-12400F	Phenom II X6 1055T (95W)
1080p
low	488 FPS	124 FPS
medium	488 FPS	124 FPS
high	488 FPS	124 FPS
ultra	488 FPS	124 FPS
1440p
low	488 FPS	124 FPS
medium	488 FPS	124 FPS
high	488 FPS	124 FPS
ultra	473 FPS	124 FPS
4K
low	488 FPS	124 FPS
medium	450 FPS	124 FPS
high	391 FPS	124 FPS
ultra	330 FPS	124 FPS

Open Core i5-12400F Open Phenom II X6 1055T (95W)

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i5-12400F and Phenom II X6 1055T (95W)

Core i5-12400F

The Core i5-12400F is manufactured by Intel. It was released in 4 January 2022 (3 years ago). It is based on the Alder Lake-S (2022) architecture. It features 6 cores and 12 threads. Base frequency is 2.5 GHz, with boost up to 4.4 GHz. L3 cache: 18 MB (total). L2 cache: 1.25 MB (per core). Built on Intel 7 nm process technology. Socket: LGA1700. Thermal design power (TDP): 65 Watt. Memory support: DDR5-4800, DDR4-3200. Passmark benchmark score: 19,532 points. Launch price was $180.

Phenom II X6 1055T (95W)

The Phenom II X6 1055T (95W) is manufactured by AMD. It was released in 2009-01-01. It is based on the Thuban (2010) architecture. It features 6 cores and 6 threads. Base frequency is 2.8 GHz, with boost up to 3.3 GHz. L3 cache: 6 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 4,965 points. Launch price was $149.

⚡

Processing Power

The Core i5-12400F packs 6 cores / 12 threads, matching the Phenom II X6 1055T (95W)'s 6 cores. Boost clocks reach 4.4 GHz on the Core i5-12400F versus 3.3 GHz on the Phenom II X6 1055T (95W) — a 28.6% clock advantage for the Core i5-12400F (base: 2.5 GHz vs 2.8 GHz). The Core i5-12400F uses the Alder Lake-S (2022) architecture (Intel 7 nm), while the Phenom II X6 1055T (95W) uses Thuban (2010) (45 nm). In PassMark, the Core i5-12400F scores 19,532 against the Phenom II X6 1055T (95W)'s 4,965 — a 118.9% lead for the Core i5-12400F. L3 cache: 18 MB (total) on the Core i5-12400F vs 6 MB (total) on the Phenom II X6 1055T (95W).

Feature	Core i5-12400F	Phenom II X6 1055T (95W)
Cores / Threads	6 / 12	6 / 6
Boost Clock	4.4 GHz+33%	3.3 GHz
Base Clock	2.5 GHz	2.8 GHz+12%
L3 Cache	18 MB (total)+200%	6 MB (total)
L2 Cache	1.25 MB (per core)+150%	512 kB (per core)
Process	Intel 7 nm-84%	45 nm
Architecture	Alder Lake-S (2022)	Thuban (2010)
PassMark	19,532+293%	4,965
Cinebench R23 Multi	12,380	—
Geekbench 6 Single	1,700	—
Geekbench 6 Multi	657	—

🧠

Memory & Platform

The Core i5-12400F uses the LGA1700 socket (PCIe 3.0), while the Phenom II X6 1055T (95W) uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Core i5-12400F	Phenom II X6 1055T (95W)
Socket	LGA1700	AM3
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	DDR5-4800, DDR4-3200	—
Max RAM Capacity	128 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	20	—

🔧

Advanced Features

Virtualization: VT-x, VT-d, EPT (Core i5-12400F) / not specified (Phenom II X6 1055T (95W)). Primary use case: Core i5-12400F targets Gaming Performance/Value. Direct competitor: Core i5-12400F rivals Ryzen 5 5600.