Athlon 64 X2 5800+ vs Xeon E5405

Athlon 64 X2 5800+ vs Xeon E5405 Performance Spectrum

Athlon 64 X2 5800+

2 / 2

1,745

0.0%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Xeon E5405

4 / 4

1,753

+0.5%

Celeron P4600

Celeron Dual-Core T3100

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 64 X2 5800+ vs Xeon E5405 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 64 X2 5800+ vs Xeon E5405: Pros, Cons & Final Verdict

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

Athlon 64 X2 5800+

2008

Why buy it

Trade-offs

❌Lower PassMark (1,745 vs 1,753).
❌Less compelling for workstation-style loads than Xeon E5405, which brings 4 cores / 4 threads.
❌Lower PassMark per dollar, at 7.6 vs 8.4 PassMark/$ ($230 MSRP vs $209 MSRP).

Xeon E5405

2007

Why buy it

✅+0.5% higher PassMark.
✅Better for workstations and heavier parallel workloads: 4 cores / 4 threads.
✅Costs $21 less on MSRP ($209 MSRP vs $230 MSRP).
✅Delivers 10.6% more PassMark for each dollar spent, at 8.4 vs 7.6 PassMark/$ ($209 MSRP vs $230 MSRP).
✅Draws 80W instead of 89W, a 9W reduction.

Trade-offs

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

Quick Answers

So, is Xeon E5405 better than Athlon 64 X2 5800+?

Not really, because they are built for different jobs. Xeon E5405 makes more sense for workstation-style multi-core throughput, while Athlon 64 X2 5800+ is the more practical desktop choice for gaming, platform cost, and everyday use.

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

For streaming, content creation, and heavier multitasking, Xeon E5405 is the stronger fit. You are getting 0.5% better PassMark, backed by 4 cores and 4 threads.

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

Xeon E5405 is the better buy right now. Xeon E5405 comes in $21 cheaper on MSRP at $209 MSRP versus $230 MSRP, and it still gives you 0.5% better PassMark. The compromise is that Athlon 64 X2 5800+ is still the better pure gaming CPU with a 0.3% average FPS lead across 50 shared CPU game tests in our data. It is also 10.6% better value on MSRP (8.4 vs 7.6 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Athlon 64 X2 5800+ makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2008 vs 2007). That makes it the safer long-term bet.

Athlon 64 X2 5800+ vs Xeon E5405 Technical Specifications

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

Athlon 64 X2 5800+

The Athlon 64 X2 5800+ is manufactured by AMD. It was released in 2009-01-01. It is based on the Brisbane (2007−2008) architecture. It features 2 cores and 2 threads. Max frequency: 3 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 65 nm process technology. Socket: AM2. Thermal design power (TDP): 89 Watt. Passmark benchmark score: 1,745 points. Launch price was $149.

Xeon E5405

The Xeon E5405 is manufactured by Intel. It was released in 11 November 2007 (18 years ago). It is based on the Harpertown (2007−2008) architecture. It features 4 cores and 4 threads. Base frequency is 2 GHz, with boost up to 2 GHz. L3 cache: 12 MB L2 Cache. L2 cache: 6 MB (total). Built on 45 nm process technology. Socket: LGA771. Thermal design power (TDP): 80 Watt. Memory support: DDR2, DDR3 Depends on motherboard. Passmark benchmark score: 1,753 points. Launch price was $209.

⚡

Processing Power

The Athlon 64 X2 5800+ packs 2 cores / 2 threads, while the Xeon E5405 offers 4 cores / 4 threads — the Xeon E5405 has 2 more cores. Boost clocks reach 3 GHz on the Athlon 64 X2 5800+ versus 2 GHz on the Xeon E5405 — a 40% clock advantage for the Athlon 64 X2 5800+. The Athlon 64 X2 5800+ uses the Brisbane (2007−2008) architecture (65 nm), while the Xeon E5405 uses Harpertown (2007−2008) (45 nm). In PassMark, the Athlon 64 X2 5800+ scores 1,745 against the Xeon E5405's 1,753 — a 0.5% lead for the Xeon E5405. L3 cache: 0 kB on the Athlon 64 X2 5800+ vs 12 MB L2 Cache on the Xeon E5405.

Feature	Athlon 64 X2 5800+	Xeon E5405
Cores / Threads	2 / 2	4 / 4+100%
Boost Clock	3 GHz+50%	2 GHz
Base Clock	—	2 GHz
L3 Cache	0 kB	12 MB L2 Cache
L2 Cache	512 kB	6 MB (total)+1100%
Process	65 nm	45 nm-31%
Architecture	Brisbane (2007−2008)	Harpertown (2007−2008)
PassMark	1,745	1,753

🧠

Memory & Platform

The Athlon 64 X2 5800+ uses the AM2 socket (PCIe 2.0), while the Xeon E5405 uses LGA771 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR2-800 on the Athlon 64 X2 5800+ versus DDR2-667 on the Xeon E5405 — the Athlon 64 X2 5800+ supports 19.9% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon E5405 supports up to 32 GB of RAM compared to 16 GB — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 0 PCIe lanes.

Feature	Athlon 64 X2 5800+	Xeon E5405
Socket	AM2	LGA771
PCIe Generation	PCIe 2.0	PCIe 2.0
Max RAM Speed	DDR2-800+20%	DDR2-667
Max RAM Capacity	16 GB	32 GB+100%
RAM Channels	2	2
ECC Support	No	Yes
PCIe Lanes	0	0

🔧

Advanced Features

Virtualization: not specified (Athlon 64 X2 5800+) / VT-x (Xeon E5405). Primary use case: Xeon E5405 targets Server.

Feature	Athlon 64 X2 5800+	Xeon E5405
Integrated GPU	No	No
Unlocked	—	No
AVX-512	—	No
Virtualization	—	VT-x
Target Use	—	Server

💰

Value Analysis

At launch, the Athlon 64 X2 5800+ was priced at $230, while the Xeon E5405 came in at $209. On launch pricing ($230 vs $209), Xeon E5405 was $21 cheaper. In terms of value on MSRP (PassMark points per dollar), the Athlon 64 X2 5800+ delivers 7.6 pts/$ vs 8.4 pts/$ for the Xeon E5405 — making the Xeon E5405 the 10% better value option.

Feature	Athlon 64 X2 5800+	Xeon E5405
MSRP	$230	$209-9%
Performance per Dollar	7.6	8.4+11%
Release Date	2008	2007

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