Atom x7405C vs Xeon E5-2643

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 x7405C vs Xeon E5-2643 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 x7405C vs Xeon E5-2643: Pros, Cons & Final Verdict

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

Atom x7405C

2024

Why buy it

✅Draws 12W instead of 130W, a 118W reduction.
✅Newer platform on FCBGA1264 with DDR5 support instead of LGA2011 and older memory support.
✅100+% more PCIe lanes (9 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel UHD Graphics, while Xeon E5-2643 needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon E5-2643 across 50 shared CPU benchmark tests.
❌Lower PassMark (5,218 vs 5,228).
❌Smaller total L3 cache (6 MB vs 10 MB).
❌Less compelling for workstation-style loads than Xeon E5-2643, which brings 4 cores / 8 threads.

Xeon E5-2643

2012

Why buy it

✅Better for gaming: +20.0% higher average FPS across 50 shared CPU benchmark tests.
✅+66.7% larger total L3 cache (10 MB vs 6 MB).
✅Better for workstations and heavier parallel workloads: 4 cores / 8 threads.

Trade-offs

❌Launch MSRP is still $1,552 MSRP, while Atom x7405C mostly shows up through inconsistent older-market listings.
❌983.3% higher power demand at 130W vs 12W.
❌Older platform position on LGA2011, while Atom x7405C moves to FCBGA1264 and DDR5.
❌No integrated graphics, while Atom x7405C can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Xeon E5-2643 better than Atom x7405C?

Not really, because they are built for different jobs. Xeon E5-2643 makes more sense for workstation-style multi-core throughput, while Atom x7405C is the more practical desktop choice for gaming, platform cost, and everyday use.

Which one is better for gaming?

If gaming is the priority, Xeon E5-2643 is the better pick. According to our tests, it delivers 20.0% 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, Xeon E5-2643 is the stronger fit. You are getting 0.2% better PassMark, backed by 4 cores and 8 threads. It also has the larger cache pool with 66.7% larger total L3 cache (10 MB vs 6 MB).

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

Xeon E5-2643 is the better buy right now. Xeon E5-2643 comes in at an unclear MSRP at $1,552 MSRP versus unclear MSRP, and it still gives you a 20.0% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (3.4 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Atom x7405C makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2024 vs 2012) and a healthier platform with FCBGA1264 and DDR5 instead of LGA2011. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Atom x7405C vs Xeon E5-2643 Technical Specifications

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

Atom x7405C

The Atom x7405C is manufactured by Intel. It was released in 8 April 2024 (1 year ago). It is based on the Amston Lake (2024−2025) architecture. It features 4 cores and 4 threads. Base frequency is 1.7 GHz, with boost up to 3.4 GHz. L3 cache: 6 MB (total). L2 cache: 2 MB (total). Built on 10 nm process technology. Socket: FCBGA1264. Thermal design power (TDP): 12 Watt. Memory support: DDR4, DDR5. Passmark benchmark score: 5,218 points. Launch price was $57.

Xeon E5-2643

The Xeon E5-2643 is manufactured by Intel. It was released in 6 March 2012 (13 years ago). It is based on the Sandy Bridge-EP (2012) architecture. It features 4 cores and 8 threads. Base frequency is 3.3 GHz, with boost up to 3.5 GHz. L3 cache: 10240 kB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA2011. Thermal design power (TDP): 130 Watt. Memory support: DDR3. Passmark benchmark score: 5,228 points. Launch price was $218.

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Processing Power

The Atom x7405C packs 4 cores / 4 threads, matching the Xeon E5-2643's 4 cores. Boost clocks reach 3.4 GHz on the Atom x7405C versus 3.5 GHz on the Xeon E5-2643 — a 2.9% clock advantage for the Xeon E5-2643 (base: 1.7 GHz vs 3.3 GHz). The Atom x7405C uses the Amston Lake (2024−2025) architecture (10 nm), while the Xeon E5-2643 uses Sandy Bridge-EP (2012) (32 nm). In PassMark, the Atom x7405C scores 5,218 against the Xeon E5-2643's 5,228 — a 0.2% lead for the Xeon E5-2643. L3 cache: 6 MB (total) on the Atom x7405C vs 10240 kB (total) on the Xeon E5-2643.

Feature	Atom x7405C	Xeon E5-2643
Cores / Threads	4 / 4	4 / 8
Boost Clock	3.4 GHz	3.5 GHz+3%
Base Clock	1.7 GHz	3.3 GHz+94%
L3 Cache	6 MB (total)	10240 kB (total)+67%
L2 Cache	2 MB (total)+700%	256 kB (per core)
Process	10 nm-69%	32 nm
Architecture	Amston Lake (2024−2025)	Sandy Bridge-EP (2012)
PassMark	5,218	5,228

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Memory & Platform

The Atom x7405C uses the FCBGA1264 socket (PCIe 4.0), while the Xeon E5-2643 uses LGA2011 (PCIe 5.0) — making them incompatible on the same motherboard.

Feature	Atom x7405C	Xeon E5-2643
Socket	FCBGA1264	LGA2011
PCIe Generation	PCIe 4.0	PCIe 5.0+25%
Max RAM Speed	DDR5-4800	—
Max RAM Capacity	16 GB	—
RAM Channels	1	—
ECC Support	No	—
PCIe Lanes	9	—