Athlon XP 2800+ vs Atom E3815

Athlon XP 2800+ vs Atom E3815 Performance Spectrum

Athlon XP 2800+

1 / 1

380

+4.1%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Atom E3815

1 / 1

365

0.0%

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.

Athlon XP 2800+ vs Atom E3815 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.

Athlon XP 2800+ vs Atom E3815: Pros, Cons & Final Verdict

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

Athlon XP 2800+

2001

Why buy it

✅Better for gaming: +11.1% higher average FPS across 48 shared CPU benchmark tests.
✅Draws 74W instead of 512W, a 438W reduction.
✅Includes a boxed cooler (Stock), unlike Atom E3815.

Trade-offs

❌Launch MSRP is still $375 MSRP, while Atom E3815 mostly shows up through inconsistent older-market listings.
❌No integrated graphics, while Atom E3815 can still boot and troubleshoot without a discrete GPU.

Atom E3815

2013

Why buy it

✅100+% more PCIe lanes (4 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel HD Graphics (Bay Trail), while Athlon XP 2800+ needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Athlon XP 2800+ across 48 shared CPU benchmark tests.
❌Lower PassMark (365 vs 380).
❌591.9% higher power demand at 512W vs 74W.
❌No boxed cooler included, unlike Athlon XP 2800+.

Quick Answers

So, is Athlon XP 2800+ better than Atom E3815?

Yes. Athlon XP 2800+ is the better all-around CPU here. It gives you a 11.1% average FPS lead across 48 shared CPU game tests in our data and 4.1% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Athlon XP 2800+ is the better pick. According to our tests, it delivers 11.1% more average FPS across 48 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Athlon XP 2800+ is the stronger fit. You are getting 4.1% better PassMark, backed by 1 cores and 1 threads.

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

Athlon XP 2800+ is the better buy right now. Athlon XP 2800+ comes in at an unclear MSRP at $375 MSRP versus unclear MSRP, and it still gives you a 11.1% average FPS lead across 48 shared CPU game tests in our data. It is also 100.0% better value on MSRP (1.0 vs 0.0 PassMark/$), 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 E3815 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2013 vs 2001). That makes it the safer long-term bet.

Athlon XP 2800+ vs Atom E3815 Technical Specifications

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

Athlon XP 2800+

The Athlon XP 2800+ is manufactured by AMD. It was released in 2009-01-01. It is based on the Barton (2001−2004) architecture. It features 1 cores and 1 threads. Max frequency: 2.25 GHz. L3 cache: 0 kB. L2 cache: 512K. Built on 130 nm process technology. Socket: A. Thermal design power (TDP): 74 Watt. Passmark benchmark score: 380 points. Launch price was $149.

Atom E3815

The Atom E3815 is manufactured by Intel. It was released in 8 October 2013 (12 years ago). It is based on the Bay Trail-I (2013) architecture. It features 1 cores and 1 threads. Max frequency: 1.47 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 22 nm process technology. Socket: FCBGA1170. Thermal design power (TDP): 512 kB. Memory support: DDR3. Passmark benchmark score: 365 points. Launch price was $134.

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Processing Power

Both the Athlon XP 2800+ and Atom E3815 share an identical 1-core/1-thread configuration. Boost clocks reach 2.25 GHz on the Athlon XP 2800+ versus 1.47 GHz on the Atom E3815 — a 41.9% clock advantage for the Athlon XP 2800+. The Athlon XP 2800+ uses the Barton (2001−2004) architecture (130 nm), while the Atom E3815 uses Bay Trail-I (2013) (22 nm). In PassMark, the Athlon XP 2800+ scores 380 against the Atom E3815's 365 — a 4% lead for the Athlon XP 2800+. Both processors carry 0 kB of L3 cache.

Feature	Athlon XP 2800+	Atom E3815
Cores / Threads	1 / 1	1 / 1
Boost Clock	2.25 GHz+53%	1.47 GHz
L3 Cache	0 kB	0 kB
L2 Cache	512K	512 kB (per core)
Process	130 nm	22 nm-83%
Architecture	Barton (2001−2004)	Bay Trail-I (2013)
PassMark	380+4%	365
Geekbench 6 Single	250	—
Geekbench 6 Multi	250	—

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Memory & Platform

The Athlon XP 2800+ uses the A socket (PCIe 1.1), while the Atom E3815 uses FCBGA1170 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR-333 on the Athlon XP 2800+ versus DDR3L-1066 on the Atom E3815 — the Atom E3815 supports -420.1% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Atom E3815 supports up to 8 GB of RAM compared to 2 GB — 300% more capacity for professional workloads. Both feature 1-channel memory with ECC support. PCIe lanes: 0 (Athlon XP 2800+) vs 4 (Atom E3815) — the Atom E3815 offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: KT400,nForce2 Ultra 400 (Athlon XP 2800+) and Intel FCBGA1170 (Atom E3815).

Feature	Athlon XP 2800+	Atom E3815
Socket	A	FCBGA1170
PCIe Generation	PCIe 1.1	PCIe 2.0+82%
Max RAM Speed	DDR-333	DDR3L-1066
Max RAM Capacity	2 GB	8 GB+300%
RAM Channels	1	1
ECC Support	No	Yes
PCIe Lanes	0	4

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Advanced Features

Virtualization: None (Athlon XP 2800+) / not specified (Atom E3815). The Atom E3815 includes integrated graphics (Intel HD Graphics (Bay Trail)), while the Athlon XP 2800+ requires a dedicated GPU. Primary use case: Athlon XP 2800+ targets Legacy Desktop.