Phenom X3 8400 vs Xeon W3505

Phenom X3 8400 vs Xeon W3505 Performance Spectrum

Phenom X3 8400

3 / 3

1,164

+0.1%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Xeon W3505

2 / 2

1,163

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.

Phenom X3 8400 vs Xeon W3505 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.

Phenom X3 8400 vs Xeon W3505: Pros, Cons & Final Verdict

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

Phenom X3 8400

2008

Why buy it

✅Draws 95W instead of 130W, a 35W reduction.

Trade-offs

❌Smaller total L3 cache (2 MB vs 4 MB).

Xeon W3505

2009

Why buy it

✅+100% larger total L3 cache (4 MB vs 2 MB).

Trade-offs

❌Lower PassMark (1,163 vs 1,164).
❌36.8% higher power demand at 130W vs 95W.

Quick Answers

So, is Phenom X3 8400 better than Xeon W3505?

Not really, because they are built for different jobs. Xeon W3505 makes more sense for workstation-style multi-core throughput, while Phenom X3 8400 is the more practical desktop choice for gaming, platform cost, and everyday use.

Which one is better for gaming?

If gaming is the priority, Phenom X3 8400 is the better pick. According to our tests, it delivers 0.2% 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, Phenom X3 8400 is the stronger fit. You are getting 0.1% better PassMark, backed by 3 cores and 3 threads.

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

Phenom X3 8400 still makes the most sense overall. Phenom X3 8400 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 0.2% average FPS lead across 50 shared CPU game tests in our data.

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

Xeon W3505 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2008) and 100% larger total L3 cache (4 MB vs 2 MB). That makes it the safer long-term bet.

Phenom X3 8400 vs Xeon W3505 Technical Specifications

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

Phenom X3 8400

The Phenom X3 8400 is manufactured by AMD. It was released in 2009-01-01. It is based on the Toliman (2008) architecture. It features 3 cores and 3 threads. Max frequency: 2.1 GHz. L3 cache: 2 MB (total). L2 cache: 512 kB (per core). Built on 65 nm process technology. Socket: AM2+. Thermal design power (TDP): 95 Watt. Passmark benchmark score: 1,164 points. Launch price was $149.

Xeon W3505

The Xeon W3505 is manufactured by Intel. It was released in 2015-01-01. It is based on the Bloomfield (2008−2010) architecture. It features 2 cores and 2 threads. Base frequency is 2.53 GHz, with boost up to 0.53 GHz. L3 cache: 4 MB (total). L2 cache: 256 kB (per core). Built on 45 nm process technology. Socket: LGA1366. Thermal design power (TDP): 130 Watt. Memory support: DDR3. Passmark benchmark score: 1,163 points. Launch price was $800.

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Processing Power

The Phenom X3 8400 packs 3 cores / 3 threads, while the Xeon W3505 offers 2 cores / 2 threads — the Phenom X3 8400 has 1 more core. Boost clocks reach 2.1 GHz on the Phenom X3 8400 versus 0.53 GHz on the Xeon W3505 — a 119.4% clock advantage for the Phenom X3 8400. The Phenom X3 8400 uses the Toliman (2008) architecture (65 nm), while the Xeon W3505 uses Bloomfield (2008−2010) (45 nm). In PassMark, the Phenom X3 8400 scores 1,164 against the Xeon W3505's 1,163 — a 0.1% lead for the Phenom X3 8400. L3 cache: 2 MB (total) on the Phenom X3 8400 vs 4 MB (total) on the Xeon W3505.

Feature	Phenom X3 8400	Xeon W3505
Cores / Threads	3 / 3+50%	2 / 2
Boost Clock	2.1 GHz+296%	0.53 GHz
Base Clock	—	2.53 GHz
L3 Cache	2 MB (total)	4 MB (total)+100%
L2 Cache	512 kB (per core)+100%	256 kB (per core)
Process	65 nm	45 nm-31%
Architecture	Toliman (2008)	Bloomfield (2008−2010)
PassMark	1,164	1,163

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Memory & Platform

The Phenom X3 8400 uses the AM2+ socket (PCIe 2.0), while the Xeon W3505 uses LGA1366 (PCIe 2.0) — making them incompatible on the same motherboard.