Pentium G645 vs Xeon X5272

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 G645 vs Xeon X5272 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 G645 vs Xeon X5272: Pros, Cons & Final Verdict

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

Pentium G645

2012

Why buy it

✅Costs $1,092 less on MSRP ($80 MSRP vs $1,172 MSRP).
✅Delivers 1364.0% more PassMark for each dollar spent, at 18.1 vs 1.2 PassMark/$ ($80 MSRP vs $1,172 MSRP).
✅Draws 65W instead of 80W, a 15W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon X5272 across 49 shared CPU benchmark tests.
❌Lower PassMark (1,450 vs 1,451).
❌Smaller total L3 cache (3 MB vs 6 MB).

Xeon X5272

2007

Why buy it

✅Better for gaming: +3.0% higher average FPS across 49 shared CPU benchmark tests.
✅+100% larger total L3 cache (6 MB vs 3 MB).

Trade-offs

❌Lower PassMark per dollar, at 1.2 vs 18.1 PassMark/$ ($1,172 MSRP vs $80 MSRP).
❌23.1% higher power demand at 80W vs 65W.

Quick Answers

So, is Xeon X5272 better than Pentium G645?

Not really, because they are built for different jobs. Xeon X5272 makes more sense for workstation-style multi-core throughput, while Pentium G645 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 X5272 is the better pick. According to our tests, it delivers 3.0% more average FPS across 49 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Xeon X5272 is the stronger fit. You are getting 0.1% better PassMark. It also has the larger cache pool with 100% larger total L3 cache (6 MB vs 3 MB).

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

Xeon X5272 is still the much better call for a fresh build. Xeon X5272 comes in 1365.0% more expensive on MSRP at $1,172 MSRP versus $80 MSRP, and it still gives you a 3.0% average FPS lead across 49 shared CPU game tests in our data. Pentium G645 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2012 platform. Even with 1364.0% better value on paper (18.1 vs 1.2 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA1155.

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

Pentium G645 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2012 vs 2007). That makes it the safer long-term bet.

Pentium G645 vs Xeon X5272 Technical Specifications

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

Pentium G645

The Pentium G645 is manufactured by Intel. It was released in 2 September 2012 (13 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 2 cores and 2 threads. Base frequency is 2.9 GHz, with boost up to 2.9 GHz. L3 cache: 3 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1155. Thermal design power (TDP): 65 Watt. Memory support: DDR3. Passmark benchmark score: 1,450 points. Launch price was $80.

Xeon X5272

The Xeon X5272 is manufactured by Intel. It was released in 2015-01-01. Base frequency: 3.4 GHz. L3 cache: 6 MB L2 Cache. Built on 45 nm process technology. Socket: LGA771. Thermal design power (TDP): 80 Watt. Passmark benchmark score: 1,451 points. Launch price was $800.

⚡

Processing Power

The Pentium G645 is built on the Sandy Bridge (2011−2013) architecture. In PassMark, the Pentium G645 scores 1,450 against the Xeon X5272's 1,451 — a 0.1% lead for the Xeon X5272. L3 cache: 3 MB (total) on the Pentium G645 vs 6 MB L2 Cache on the Xeon X5272.

Feature	Pentium G645	Xeon X5272
Cores / Threads	2 / 2	—
Boost Clock	2.9 GHz	—
Base Clock	2.9 GHz	3.4 GHz+17%
L3 Cache	3 MB (total)	6 MB L2 Cache+100%
L2 Cache	256 kB (per core)	—
Process	32 nm-29%	45 nm
Architecture	Sandy Bridge (2011−2013)	—
PassMark	1,450	1,451

🧠

Memory & Platform

The Pentium G645 uses the LGA1155 socket (PCIe 2.0), while the Xeon X5272 uses LGA771 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Pentium G645	Xeon X5272
Socket	LGA1155	LGA771
PCIe Generation	PCIe 2.0	PCIe 2.0
Max RAM Speed	—	DDR2
Max RAM Capacity	—	128 GB
RAM Channels	—	4
ECC Support	—	Yes
PCIe Lanes	—	0

🔧

Advanced Features

Virtualization: not specified (Pentium G645) / true (Xeon X5272). Primary use case: Xeon X5272 targets Server.

Feature	Pentium G645	Xeon X5272
Integrated GPU	—	No
Unlocked	—	No
AVX-512	—	No
Virtualization	—	true
Target Use	—	Server

💰

Value Analysis

At launch, the Pentium G645 was priced at $80, while the Xeon X5272 came in at $1172. On launch pricing ($80 vs $1172), Pentium G645 was $1092 cheaper. In terms of value on MSRP (PassMark points per dollar), the Pentium G645 delivers 18.1 pts/$ vs 1.2 pts/$ for the Xeon X5272 — making the Pentium G645 the 174.4% better value option.

Feature	Pentium G645	Xeon X5272
MSRP	$80-93%	$1172
Performance per Dollar	18.1+1408%	1.2
Release Date	2012	2007

Search Pentium G645 on Amazon

Search Xeon X5272 on Amazon

Affiliate Disclosure

ChipVERSUS is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. We may earn a commission on qualifying purchases made through our links. This comes at no additional cost to you and helps support our work in providing comprehensive PC building guides and tools.

Amazon and the Amazon logo are trademarks of Amazon.com, Inc. or its affiliates.