Pentium 6805 vs Xeon X5647

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.

Pentium 6805 vs Xeon X5647 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.

Pentium 6805 vs Xeon X5647: Pros, Cons & Final Verdict

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

Pentium 6805

2020

Why buy it

✅Draws 15W instead of 130W, a 115W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon X5647 across 50 shared CPU benchmark tests.
❌Lower PassMark (4,424 vs 4,441).
❌Smaller total L3 cache (4 MB vs 12 MB).
❌Less compelling for workstation-style loads than Xeon X5647, which brings 4 cores / 8 threads.
❌Launch MSRP is still $161 MSRP, while Xeon X5647 mostly shows up through inconsistent older-market listings.

Xeon X5647

2011

Why buy it

✅Better for gaming: +20.3% higher average FPS across 50 shared CPU benchmark tests.
✅+200% larger total L3 cache (12 MB vs 4 MB).
✅Better for workstations and heavier parallel workloads: 4 cores / 8 threads.

Trade-offs

❌766.7% higher power demand at 130W vs 15W.

Quick Answers

So, is Xeon X5647 better than Pentium 6805?

Not really, because they are built for different jobs. Xeon X5647 makes more sense for workstation-style multi-core throughput, while Pentium 6805 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 X5647 is the better pick. According to our tests, it delivers 20.3% 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 X5647 is the stronger fit. You are getting 0.4% better PassMark, backed by 4 cores and 8 threads. It also has the larger cache pool with 200% larger total L3 cache (12 MB vs 4 MB).

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

Xeon X5647 is the easy recommendation for a fresh desktop build. Xeon X5647 comes in at an unclear MSRP at unclear MSRP versus $161 MSRP, and it still gives you a 20.3% average FPS lead across 50 shared CPU game tests in our data. Pentium 6805 only looks good on raw value math because it is a cheap legacy laptop chip, not because it is a real desktop gaming recommendation. It simply does not keep up in modern games, especially when the gap is already 20.3% in the shared gaming data.

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

Pentium 6805 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2020 vs 2011). That makes it the safer long-term bet.

Pentium 6805 vs Xeon X5647 Technical Specifications

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

Pentium 6805

The Pentium 6805 is manufactured by Intel. It was released in 1 October 2020 (5 years ago). It is based on the Ice Lake-Y (2020) architecture. It features 2 cores and 4 threads. Base frequency is 1.1 GHz, with boost up to 3 GHz. L3 cache: 4 MB (total). L2 cache: 256 kB (per core). Built on 10 nm process technology. Socket: FCBGA1526. Thermal design power (TDP): 15 Watt. Memory support: DDR4-3200, LPDDR4-3733. Passmark benchmark score: 4,424 points. Launch price was $161.

Xeon X5647

The Xeon X5647 is manufactured by Intel. It was released in 14 February 2011 (14 years ago). It is based on the Westmere-EP (2010−2011) architecture. It features 4 cores and 8 threads. Base frequency is 2.93 GHz, with boost up to 3.2 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 130 Watt. Memory support: DDR3. Passmark benchmark score: 4,441 points. Launch price was $175.

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Processing Power

The Pentium 6805 packs 2 cores / 4 threads, while the Xeon X5647 offers 4 cores / 8 threads — the Xeon X5647 has 2 more cores. Boost clocks reach 3 GHz on the Pentium 6805 versus 3.2 GHz on the Xeon X5647 — a 6.5% clock advantage for the Xeon X5647 (base: 1.1 GHz vs 2.93 GHz). The Pentium 6805 uses the Ice Lake-Y (2020) architecture (10 nm), while the Xeon X5647 uses Westmere-EP (2010−2011) (32 nm). In PassMark, the Pentium 6805 scores 4,424 against the Xeon X5647's 4,441 — a 0.4% lead for the Xeon X5647. L3 cache: 4 MB (total) on the Pentium 6805 vs 12 MB (total) on the Xeon X5647.

Feature	Pentium 6805	Xeon X5647
Cores / Threads	2 / 4	4 / 8+100%
Boost Clock	3 GHz	3.2 GHz+7%
Base Clock	1.1 GHz	2.93 GHz+166%
L3 Cache	4 MB (total)	12 MB (total)+200%
L2 Cache	256 kB (per core)	256 kB (per core)
Process	10 nm-69%	32 nm
Architecture	Ice Lake-Y (2020)	Westmere-EP (2010−2011)
PassMark	4,424	4,441

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Memory & Platform

The Pentium 6805 uses the FCBGA1526 socket (PCIe 3.0), while the Xeon X5647 uses LGA1366 (PCIe 5.0) — making them incompatible on the same motherboard.

Feature	Pentium 6805	Xeon X5647
Socket	FCBGA1526	LGA1366
PCIe Generation	PCIe 3.0	PCIe 5.0+67%
Max RAM Speed	—	DDR3-1066
RAM Channels	—	3
ECC Support	—	Yes

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Advanced Features

Virtualization: not specified (Pentium 6805) / VT-x, VT-d (Xeon X5647). Primary use case: Xeon X5647 targets Workstation. Direct competitor: Xeon X5647 rivals Core i7-980X.