Phenom II X6 1055T (95W) vs Xeon E5-2420

Phenom II X6 1055T (95W) vs Xeon E5-2420 Performance Spectrum

Phenom II X6 1055T (95W)

6 / 6

4,965

0.0%

Ryzen Threadripper PRO 7965WX

Xeon E5-2420

6 / 12

5,012

+0.9%

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 II X6 1055T (95W) vs Xeon E5-2420 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 II X6 1055T (95W) vs Xeon E5-2420: Pros, Cons & Final Verdict

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

Phenom II X6 1055T (95W)

2010

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than Xeon E5-2420 across 50 shared CPU benchmark tests.
❌Lower PassMark (4,965 vs 5,012).
❌Smaller total L3 cache (6 MB vs 15 MB).
❌Less compelling for workstation-style loads than Xeon E5-2420, which brings 6 cores / 12 threads.

Xeon E5-2420

2012

Why buy it

✅Better for gaming: +18.5% higher average FPS across 50 shared CPU benchmark tests.
✅+150% larger total L3 cache (15 MB vs 6 MB).
✅Better for workstations and heavier parallel workloads: 6 cores / 12 threads.

Trade-offs

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

Quick Answers

So, is Xeon E5-2420 better than Phenom II X6 1055T (95W)?

Not really, because they are built for different jobs. Xeon E5-2420 makes more sense for workstation-style multi-core throughput, while Phenom II X6 1055T (95W) 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 E5-2420 is the better pick. According to our tests, it delivers 18.5% 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 E5-2420 is the stronger fit. You are getting 0.9% better PassMark, backed by 6 cores and 12 threads. It also has the larger cache pool with 150% larger total L3 cache (15 MB vs 6 MB).

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

Xeon E5-2420 still makes the most sense overall. Xeon E5-2420 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 18.5% average FPS lead across 50 shared CPU game tests in our data.

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

Xeon E5-2420 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2012 vs 2010), 150% larger total L3 cache (15 MB vs 6 MB), and more multi-core headroom with 6 cores / 12 threads instead of 6/6. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Phenom II X6 1055T (95W) vs Xeon E5-2420 Technical Specifications

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

Phenom II X6 1055T (95W)

The Phenom II X6 1055T (95W) is manufactured by AMD. It was released in 2009-01-01. It is based on the Thuban (2010) architecture. It features 6 cores and 6 threads. Base frequency is 2.8 GHz, with boost up to 3.3 GHz. L3 cache: 6 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 4,965 points. Launch price was $149.

Xeon E5-2420

The Xeon E5-2420 is manufactured by Intel. It was released in 14 May 2012 (13 years ago). It is based on the Sandy Bridge-EN (2012) architecture. It features 6 cores and 12 threads. Base frequency is 1.9 GHz, with boost up to 2.4 GHz. L3 cache: 15360 kB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1356. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 5,012 points. Launch price was $390.

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Processing Power

The Phenom II X6 1055T (95W) packs 6 cores / 6 threads, matching the Xeon E5-2420's 6 cores. Boost clocks reach 3.3 GHz on the Phenom II X6 1055T (95W) versus 2.4 GHz on the Xeon E5-2420 — a 31.6% clock advantage for the Phenom II X6 1055T (95W) (base: 2.8 GHz vs 1.9 GHz). The Phenom II X6 1055T (95W) uses the Thuban (2010) architecture (45 nm), while the Xeon E5-2420 uses Sandy Bridge-EN (2012) (32 nm). In PassMark, the Phenom II X6 1055T (95W) scores 4,965 against the Xeon E5-2420's 5,012 — a 0.9% lead for the Xeon E5-2420. L3 cache: 6 MB (total) on the Phenom II X6 1055T (95W) vs 15360 kB (total) on the Xeon E5-2420.

Feature	Phenom II X6 1055T (95W)	Xeon E5-2420
Cores / Threads	6 / 6	6 / 12
Boost Clock	3.3 GHz+38%	2.4 GHz
Base Clock	2.8 GHz+47%	1.9 GHz
L3 Cache	6 MB (total)	15360 kB (total)+150%
L2 Cache	512 kB (per core)+100%	256 kB (per core)
Process	45 nm	32 nm-29%
Architecture	Thuban (2010)	Sandy Bridge-EN (2012)
PassMark	4,965	5,012

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Memory & Platform

The Phenom II X6 1055T (95W) uses the AM3 socket (PCIe 2.0), while the Xeon E5-2420 uses LGA1356 (PCIe 2.0) — making them incompatible on the same motherboard.