E1-2100 vs Pentium G645

E1-2100 vs Pentium G645 Performance Spectrum

E1-2100

2 / 2

1,435

0.0%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Pentium G645

2 / 2

1,450

+1.0%

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.

E1-2100 vs Pentium G645 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.

E1-2100 vs Pentium G645: Pros, Cons & Final Verdict

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

E1-2100

2013

Why buy it

✅Draws 9W instead of 65W, a 56W reduction.

Trade-offs

❌Lower PassMark (1,435 vs 1,450).

Pentium G645

2012

Why buy it

Trade-offs

❌Launch MSRP is still $80 MSRP, while E1-2100 mostly shows up through inconsistent older-market listings.
❌622.2% higher power demand at 65W vs 9W.

Quick Answers

So, is Pentium G645 better than E1-2100?

Yes. Pentium G645 is the better all-around CPU here. It gives you a 1.6% average FPS lead across 50 shared CPU game tests in our data and 1% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Pentium G645 is the better pick. According to our tests, it delivers 1.6% 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 G645 is the stronger fit. You are getting 1% better PassMark, backed by 2 cores and 2 threads.

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

Pentium G645 is the better buy right now. Pentium G645 comes in at an unclear MSRP at $80 MSRP versus unclear MSRP, and it still gives you a 1.6% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (18.1 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

E1-2100 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2013 vs 2012). That makes it the safer long-term bet.

E1-2100 vs Pentium G645 Technical Specifications

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

E1-2100

The E1-2100 is manufactured by AMD. It was released in 2014-01-01. It is based on the Kabini (2013−2014) architecture. It features 2 cores and 2 threads. Max frequency: 1 GHz. L3 cache: 0 kB. L2 cache: 1024 kB. Built on 28 nm process technology. Socket: FT3. Thermal design power (TDP): 9 Watt. Memory support: DDR3. Passmark benchmark score: 1,435 points. Launch price was $50.

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.

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Processing Power

Both the E1-2100 and Pentium G645 share an identical 2-core/2-thread configuration. Boost clocks reach 1 GHz on the E1-2100 versus 2.9 GHz on the Pentium G645 — a 97.4% clock advantage for the Pentium G645. The E1-2100 uses the Kabini (2013−2014) architecture (28 nm), while the Pentium G645 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the E1-2100 scores 1,435 against the Pentium G645's 1,450 — a 1% lead for the Pentium G645. L3 cache: 0 kB on the E1-2100 vs 3 MB (total) on the Pentium G645.

Feature	E1-2100	Pentium G645
Cores / Threads	2 / 2	2 / 2
Boost Clock	1 GHz	2.9 GHz+190%
Base Clock	—	2.9 GHz
L3 Cache	0 kB	3 MB (total)
L2 Cache	1024 kB+300%	256 kB (per core)
Process	28 nm-13%	32 nm
Architecture	Kabini (2013−2014)	Sandy Bridge (2011−2013)
PassMark	1,435	1,450+1%

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Memory & Platform

The E1-2100 uses the FT3 socket (PCIe 2.0), while the Pentium G645 uses LGA1155 (PCIe 2.0) — making them incompatible on the same motherboard.