Athlon 64 FX-55 vs Pentium D 915

Athlon 64 FX-55 vs Pentium D 915 Performance Spectrum

Athlon 64 FX-55

1 / 1

690

0.0%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Pentium D 915

2 / 2

705

+2.2%

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 FX-55 vs Pentium D 915 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 FX-55 vs Pentium D 915: 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 FX-55

2004

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than Pentium D 915 across 50 shared CPU benchmark tests.
❌Lower PassMark (690 vs 705).
❌Lower PassMark per dollar, at 0.8 vs 9.5 PassMark/$ ($827 MSRP vs $74 MSRP).

Pentium D 915

2006

Why buy it

✅Better for gaming: +5.6% higher average FPS across 50 shared CPU benchmark tests.
✅Costs $753 less on MSRP ($74 MSRP vs $827 MSRP).
✅Delivers 1041.9% more PassMark for each dollar spent, at 9.5 vs 0.8 PassMark/$ ($74 MSRP vs $827 MSRP).
✅Draws 95W instead of 104W, a 9W reduction.

Trade-offs

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

Quick Answers

So, is Pentium D 915 better than Athlon 64 FX-55?

Yes. Pentium D 915 is the better all-around CPU here. It gives you a 5.6% average FPS lead across 50 shared CPU game tests in our data, 2.2% better PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Pentium D 915 is the better pick. According to our tests, it delivers 5.6% 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, Pentium D 915 is the stronger fit. You are getting 2.2% better PassMark, backed by 2 cores and 2 threads.

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

Pentium D 915 is the better buy right now. Pentium D 915 comes in $753 cheaper on MSRP at $74 MSRP versus $827 MSRP, and it still gives you a 5.6% average FPS lead across 50 shared CPU game tests in our data. It is also 1041.9% better value on MSRP (9.5 vs 0.8 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Pentium D 915 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2006 vs 2004) and more multi-core headroom with 2 cores / 2 threads instead of 1/1. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Athlon 64 FX-55 vs Pentium D 915 Technical Specifications

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

Athlon 64 FX-55

The Athlon 64 FX-55 is manufactured by AMD. It was released in 10 October 2004 (21 years ago). It is based on the Clawhammer (2001−2005) architecture. It features 1 cores and 1 threads. Base frequency is 2.6 GHz, with boost up to 2.6 GHz. L3 cache: 0 kB. L2 cache: 1 MB. Built on 130 nm process technology. Socket: 939. Thermal design power (TDP): 104 Watt. Memory support: DDR1 Depends on motherboard. Passmark benchmark score: 690 points. Launch price was $180.

Pentium D 915

The Pentium D 915 is manufactured by Intel. It was released in 23 July 2006 (19 years ago). It is based on the NetBurst (2000−2006) architecture. It features 2 cores and 2 threads. Base frequency is 2.8 GHz, with boost up to 2.8 GHz. L3 cache: 0 kB. L2 cache: 2 MB (total). Built on 65 nm process technology. Socket: LGA775. Thermal design power (TDP): 95 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 705 points. Launch price was $74.

⚡

Processing Power

The Athlon 64 FX-55 packs 1 cores / 1 threads, while the Pentium D 915 offers 2 cores / 2 threads — the Pentium D 915 has 1 more core. Boost clocks reach 2.6 GHz on the Athlon 64 FX-55 versus 2.8 GHz on the Pentium D 915 — a 7.4% clock advantage for the Pentium D 915 (base: 2.6 GHz vs 2.8 GHz). The Athlon 64 FX-55 uses the Clawhammer (2001−2005) architecture (130 nm), while the Pentium D 915 uses NetBurst (2000−2006) (65 nm). In PassMark, the Athlon 64 FX-55 scores 690 against the Pentium D 915's 705 — a 2.2% lead for the Pentium D 915. Both processors carry 0 kB of L3 cache.

Feature	Athlon 64 FX-55	Pentium D 915
Cores / Threads	1 / 1	2 / 2+100%
Boost Clock	2.6 GHz	2.8 GHz+8%
Base Clock	2.6 GHz	2.8 GHz+8%
L3 Cache	0 kB	0 kB
L2 Cache	1 MB	2 MB (total)+100%
Process	130 nm	65 nm-50%
Architecture	Clawhammer (2001−2005)	NetBurst (2000−2006)
PassMark	690	705+2%

🧠

Memory & Platform

The Athlon 64 FX-55 uses the 939 socket (PCIe 1.1), while the Pentium D 915 uses LGA775 (PCIe 1.1) — making them incompatible on the same motherboard.

Feature	Athlon 64 FX-55	Pentium D 915
Socket	939	LGA775
PCIe Generation	PCIe 1.1	PCIe 1.1
Max RAM Speed	DDR1-400	—
Max RAM Capacity	4 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	0	—

💰

Value Analysis

At launch, the Athlon 64 FX-55 was priced at $827, while the Pentium D 915 came in at $74. On launch pricing ($827 vs $74), Pentium D 915 was $753 cheaper. In terms of value on MSRP (PassMark points per dollar), the Athlon 64 FX-55 delivers 0.8 pts/$ vs 9.5 pts/$ for the Pentium D 915 — making the Pentium D 915 the 167.8% better value option.

Feature	Athlon 64 FX-55	Pentium D 915
MSRP	$827	$74-91%
Performance per Dollar	0.8	9.5+1087%
Release Date	2004	2006

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