Atom C3955 vs Phenom II X6 1100T BE

Atom C3955 vs Phenom II X6 1100T BE Performance Spectrum

Atom C3955

16 / 16

5,803

+1.0%

Phenom II X6 1100T BE

6 / 6

5,745

0.0%

Ryzen Threadripper PRO 3975WX

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.

Atom C3955 vs Phenom II X6 1100T BE 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.

Atom C3955 vs Phenom II X6 1100T BE: Pros, Cons & Final Verdict

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

Atom C3955

2017

Why buy it

✅Better for gaming: +33.8% higher average FPS across 50 shared CPU benchmark tests.
✅+166.7% larger total L3 cache (16 MB vs 6 MB).
✅Draws 32W instead of 125W, a 93W reduction.

Trade-offs

❌No boxed cooler included, unlike Phenom II X6 1100T BE.

Phenom II X6 1100T BE

2010

Why buy it

✅33.3% more PCIe lanes (16 vs 12) for storage and expansion-heavy builds.
✅Includes a boxed cooler (Yes), unlike Atom C3955.

Trade-offs

❌Worse for gaming: lower average FPS than Atom C3955 across 50 shared CPU benchmark tests.
❌Lower PassMark (5,745 vs 5,803).
❌Smaller total L3 cache (6 MB vs 16 MB).
❌Launch MSRP is still $265 MSRP, while Atom C3955 mostly shows up through inconsistent older-market listings.
❌290.6% higher power demand at 125W vs 32W.

Quick Answers

So, is Atom C3955 better than Phenom II X6 1100T BE?

Yes. Atom C3955 is the better all-around CPU here. It gives you a 33.8% average FPS lead across 50 shared CPU game tests in our data, 1% better PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Atom C3955 is the better pick. According to our tests, it delivers 33.8% 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, Atom C3955 is the stronger fit. You are getting 1% better PassMark, backed by 16 cores and 16 threads. It also has the larger cache pool with 166.7% larger total L3 cache (16 MB vs 6 MB).

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

Atom C3955 is still the much better call for a fresh build. Atom C3955 comes in at an unclear MSRP at unclear MSRP versus $265 MSRP, and it still gives you a 33.8% average FPS lead across 50 shared CPU game tests in our data. Phenom II X6 1100T BE only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2010 platform. Even with 100.0% better value on paper (21.7 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on AM3.

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

Atom C3955 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2017 vs 2010), 166.7% larger total L3 cache (16 MB vs 6 MB), and more multi-core headroom with 16 cores / 16 threads instead of 6/6. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Atom C3955 vs Phenom II X6 1100T BE Technical Specifications

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

Atom C3955

The Atom C3955 is manufactured by Intel. It was released in 15 August 2017 (8 years ago). It is based on the Goldmont (2016−2017) architecture. It features 16 cores and 16 threads. Base frequency is 2.1 GHz, with boost up to 2.4 GHz. L3 cache: 16 MB. L2 cache: 16 MB. Built on 14 nm process technology. Socket: FCBGA1310. Thermal design power (TDP): 32 Watt. Memory support: DDR4: 2400. Passmark benchmark score: 5,803 points. Launch price was $434.

Phenom II X6 1100T BE

The Phenom II X6 1100T BE 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 3.3 GHz, with boost up to 3.7 GHz. L3 cache: 6 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 125 Watt. Memory support: DDR3. Passmark benchmark score: 5,745 points. Launch price was $149.

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Processing Power

The Atom C3955 packs 16 cores / 16 threads, while the Phenom II X6 1100T BE offers 6 cores / 6 threads — the Atom C3955 has 10 more cores. Boost clocks reach 2.4 GHz on the Atom C3955 versus 3.7 GHz on the Phenom II X6 1100T BE — a 42.6% clock advantage for the Phenom II X6 1100T BE (base: 2.1 GHz vs 3.3 GHz). The Atom C3955 uses the Goldmont (2016−2017) architecture (14 nm), while the Phenom II X6 1100T BE uses Thuban (2010) (45 nm). In PassMark, the Atom C3955 scores 5,803 against the Phenom II X6 1100T BE's 5,745 — a 1% lead for the Atom C3955. L3 cache: 16 MB on the Atom C3955 vs 6 MB (total) on the Phenom II X6 1100T BE.

Feature	Atom C3955	Phenom II X6 1100T BE
Cores / Threads	16 / 16+167%	6 / 6
Boost Clock	2.4 GHz	3.7 GHz+54%
Base Clock	2.1 GHz	3.3 GHz+57%
L3 Cache	16 MB+167%	6 MB (total)
L2 Cache	16 MB+3100%	512 kB (per core)
Process	14 nm-69%	45 nm
Architecture	Goldmont (2016−2017)	Thuban (2010)
PassMark	5,803+1%	5,745
Geekbench 6 Single	—	508

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Memory & Platform

The Atom C3955 uses the FCBGA1310 socket (PCIe 3.0), while the Phenom II X6 1100T BE uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2400 on the Atom C3955 versus DDR3-1333 / DDR2-1066 on the Phenom II X6 1100T BE — the Atom C3955 supports 80% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Atom C3955 supports up to 256 GB of RAM compared to 32 GB — 700% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 12 (Atom C3955) vs 16 (Phenom II X6 1100T BE) — the Phenom II X6 1100T BE offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel FCBGA1310 (Atom C3955) and AMD 870,880G,890FX,970,990FX (Phenom II X6 1100T BE).

Feature	Atom C3955	Phenom II X6 1100T BE
Socket	FCBGA1310	AM3
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	DDR4-2400+80%	DDR3-1333 / DDR2-1066
Max RAM Capacity	256 GB+700%	32 GB
RAM Channels	2	2
ECC Support	Yes	Yes
PCIe Lanes	12	16+33%

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Advanced Features

Virtualization: not specified (Atom C3955) / AMD-V (Phenom II X6 1100T BE). Primary use case: Phenom II X6 1100T BE targets Enthusiast Legacy.