Atom C3955 vs Phenom II X6 1100T BE

CPU

GPU

Atom C3955

16 Cores16 Thrd32 WWMax: 2.4 GHz2017

Popular choices:

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Phenom II X6 1100T BE

6 Cores6 Thrd125 WWMax: 3.7 GHz2010

Popular choices:

•••••••••

Performance Spectrum - CPU

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.

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.

Atom C3955

2017

Why buy it

✅+1% higher PassMark.
✅+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

❌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.

Atom C3955

2017

Phenom II X6 1100T BE

2010

Why buy it

✅+1% higher PassMark.
✅+166.7% larger total L3 cache (16 MB vs 6 MB).
✅Draws 32W instead of 125W, a 93W reduction.

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

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

Trade-offs

❌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?

It depends on what matters more to you. For gaming, Phenom II X6 1100T BE is ahead with a 0.7% average FPS lead across 2 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Atom C3955 pulls ahead with 1% better PassMark. Atom C3955 also has the bigger cache pool with 166.7% larger total L3 cache (16 MB vs 6 MB).

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Atom C3955 is the better fit. You are getting 1% better PassMark, backed by 16 cores and 16 threads. It also carries 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 the smarter buy by a wide margin for a fresh build. Atom C3955 is at an unclear MSRP at unclear MSRP versus $265 MSRP, and it gives you 1% better PassMark. Phenom II X6 1100T BE only looks stronger on raw value math because it is extremely cheap, but that is mostly used-market pricing on an obsolete 2010 platform. Even with 100.0% better value on paper (21.7 vs 0.0 PassMark/$), it really only makes sense as a very 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 is the more future-proof choice 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 should age better as games, background tasks, and creator workloads get heavier.

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.

Atom C3955 Benchmark Check

Phenom II X6 1100T BE Benchmark Check

Path of Exile 2

Preset	Atom C3955	Phenom II X6 1100T BE
1080p
low	145 FPS	144 FPS
medium	135 FPS	140 FPS
high	109 FPS	113 FPS
ultra	87 FPS	93 FPS
1440p
low	138 FPS	137 FPS
medium	108 FPS	116 FPS
high	86 FPS	92 FPS
ultra	68 FPS	75 FPS
4K
low	65 FPS	63 FPS
medium	55 FPS	56 FPS
high	43 FPS	44 FPS
ultra	34 FPS	35 FPS

Open Atom C3955 Open Phenom II X6 1100T BE

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Atom C3955	Phenom II X6 1100T BE
1080p
low	141 FPS	144 FPS
medium	124 FPS	144 FPS
high	113 FPS	144 FPS
ultra	90 FPS	139 FPS
1440p
low	124 FPS	144 FPS
medium	112 FPS	144 FPS
high	101 FPS	144 FPS
ultra	81 FPS	125 FPS
4K
low	91 FPS	144 FPS
medium	84 FPS	137 FPS
high	75 FPS	122 FPS
ultra	58 FPS	93 FPS

Open Atom C3955 Open Phenom II X6 1100T BE

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Atom C3955	Phenom II X6 1100T BE
1080p
low	145 FPS	144 FPS
medium	145 FPS	144 FPS
high	145 FPS	144 FPS
ultra	145 FPS	144 FPS
1440p
low	145 FPS	144 FPS
medium	145 FPS	144 FPS
high	145 FPS	144 FPS
ultra	145 FPS	144 FPS
4K
low	145 FPS	144 FPS
medium	145 FPS	144 FPS
high	145 FPS	144 FPS
ultra	145 FPS	134 FPS

Open Atom C3955 Open Phenom II X6 1100T BE

League of Legends

League of Legends

Valorant

Preset	Atom C3955	Phenom II X6 1100T BE
1080p
low	145 FPS	144 FPS
medium	145 FPS	144 FPS
high	145 FPS	144 FPS
ultra	145 FPS	144 FPS
1440p
low	145 FPS	144 FPS
medium	145 FPS	144 FPS
high	145 FPS	144 FPS
ultra	145 FPS	144 FPS
4K
low	145 FPS	144 FPS
medium	145 FPS	144 FPS
high	145 FPS	144 FPS
ultra	145 FPS	144 FPS

Open Atom C3955 Open Phenom II X6 1100T BE

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Atom C3955 and Phenom II X6 1100T BE

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 28.6% 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 — 155.6% 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+33%	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.