Atom C3958 vs Xeon E3-1220

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 C3958 vs Xeon E3-1220 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 C3958 vs Xeon E3-1220: Pros, Cons & Final Verdict

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

Atom C3958

2017

Why buy it

✅Better for gaming: +22.3% higher average FPS across 50 shared CPU benchmark tests.
✅+100% larger total L3 cache (16 MB vs 8 MB).
✅Draws 31W instead of 80W, a 49W reduction.
✅100+% more PCIe lanes (12 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Xeon E3-1220

2011

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than Atom C3958 across 50 shared CPU benchmark tests.
❌Lower PassMark (3,859 vs 3,929).
❌Smaller total L3 cache (8 MB vs 16 MB).
❌158.1% higher power demand at 80W vs 31W.

Quick Answers

So, is Atom C3958 better than Xeon E3-1220?

Not really, because they are built for different jobs. Xeon E3-1220 makes more sense for workstation-style multi-core throughput, while Atom C3958 is the more practical desktop choice for gaming, platform cost, and everyday use.

Which one is better for gaming?

If gaming is the priority, Atom C3958 is the better pick. According to our tests, it delivers 22.3% 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, Atom C3958 is the stronger fit. You are getting 1.8% better PassMark, backed by 16 cores and 16 threads. It also has the larger cache pool with 100% larger total L3 cache (16 MB vs 8 MB).

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

Atom C3958 still makes the most sense overall. Atom C3958 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 22.3% average FPS lead across 50 shared CPU game tests in our data.

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

Atom C3958 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2017 vs 2011), 100% larger total L3 cache (16 MB vs 8 MB), and more multi-core headroom with 16 cores / 16 threads instead of 4/4. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Atom C3958 vs Xeon E3-1220 Technical Specifications

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

Atom C3958

The Atom C3958 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 GHz, with boost up to 2 GHz. L3 cache: 16 MB. L2 cache: 16 MB. Built on 14 nm process technology. Socket: FCBGA1310. Thermal design power (TDP): 31 Watt. Memory support: DDR4: 2400. Passmark benchmark score: 3,929 points. Launch price was $449.

Xeon E3-1220

The Xeon E3-1220 is manufactured by Intel. It was released in 3 April 2011 (14 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 4 cores and 4 threads. Base frequency is 3.1 GHz, with boost up to 3.4 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1155. Thermal design power (TDP): 80 Watt. Memory support: DDR3. Passmark benchmark score: 3,859 points. Launch price was $395.

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Processing Power

The Atom C3958 packs 16 cores / 16 threads, while the Xeon E3-1220 offers 4 cores / 4 threads — the Atom C3958 has 12 more cores. Boost clocks reach 2 GHz on the Atom C3958 versus 3.4 GHz on the Xeon E3-1220 — a 51.9% clock advantage for the Xeon E3-1220 (base: 2 GHz vs 3.1 GHz). The Atom C3958 uses the Goldmont (2016−2017) architecture (14 nm), while the Xeon E3-1220 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Atom C3958 scores 3,929 against the Xeon E3-1220's 3,859 — a 1.8% lead for the Atom C3958. L3 cache: 16 MB on the Atom C3958 vs 8 MB (total) on the Xeon E3-1220.

Feature	Atom C3958	Xeon E3-1220
Cores / Threads	16 / 16+300%	4 / 4
Boost Clock	2 GHz	3.4 GHz+70%
Base Clock	2 GHz	3.1 GHz+55%
L3 Cache	16 MB+100%	8 MB (total)
L2 Cache	16 MB+6300%	256 kB (per core)
Process	14 nm-56%	32 nm
Architecture	Goldmont (2016−2017)	Sandy Bridge (2011−2013)
PassMark	3,929+2%	3,859

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Memory & Platform

The Atom C3958 uses the FCBGA1310 socket (PCIe 3.0), while the Xeon E3-1220 uses LGA1155 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Atom C3958	Xeon E3-1220
Socket	FCBGA1310	LGA1155
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	DDR4-2400	—
Max RAM Capacity	256 GB	—
RAM Channels	2	—
ECC Support	Yes	—
PCIe Lanes	12	—