Core i3-2125 vs Core i7-640M

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.

Core i3-2125 vs Core i7-640M 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.

Core i3-2125 vs Core i7-640M: Pros, Cons & Final Verdict

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

Core i3-2125

2011

Why buy it

✅Includes a boxed cooler (Yes), unlike Core i7-640M.

Trade-offs

❌Lower PassMark (2,082 vs 2,092).
❌Smaller total L3 cache (3 MB vs 4 MB).
❌Launch MSRP is still $134 MSRP, while Core i7-640M mostly shows up through inconsistent older-market listings.
❌85.7% higher power demand at 65W vs 35W.

Core i7-640M

2010

Why buy it

✅+33.3% larger total L3 cache (4 MB vs 3 MB).
✅Draws 35W instead of 65W, a 30W reduction.

Trade-offs

❌No boxed cooler included, unlike Core i3-2125.

Quick Answers

So, is Core i7-640M better than Core i3-2125?

Yes. Core i7-640M is the better all-around CPU here. It gives you a 0.3% average FPS lead across 50 shared CPU game tests in our data and 0.5% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Core i7-640M is the better pick. According to our tests, it delivers 0.3% 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, Core i7-640M is the stronger fit. You are getting 0.5% better PassMark, backed by 2 cores and 4 threads. It also has the larger cache pool with 33.3% larger total L3 cache (4 MB vs 3 MB).

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

Core i7-640M is still the much better call for a fresh build. Core i7-640M comes in at an unclear MSRP at unclear MSRP versus $134 MSRP, and it still gives you a 0.3% average FPS lead across 50 shared CPU game tests in our data. Core i3-2125 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2011 platform. Even with 100.0% better value on paper (15.5 vs 0.0 PassMark/$), 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?

Core i3-2125 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2011 vs 2010). That makes it the safer long-term bet.

Core i3-2125 vs Core i7-640M Technical Specifications

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

Core i3-2125

The Core i3-2125 is manufactured by Intel. It was released in 4 September 2011 (14 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 2 cores and 4 threads. Base frequency is 3.3 GHz, with boost up to 3.3 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: 2,082 points. Launch price was $170.

Core i7-640M

The Core i7-640M is manufactured by Intel. It was released in 1 September 2010 (15 years ago). It is based on the Arrandale (2010−2011) architecture. It features 2 cores and 4 threads. Base frequency is 2.8 GHz, with boost up to 3.46 GHz. L3 cache: 4 MB (total). L2 cache: 256K (per core). Built on 32 nm process technology. Socket: PGA988. Thermal design power (TDP): 35 Watt. Memory support: DDR3. Passmark benchmark score: 2,092 points. Launch price was $346.

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Processing Power

Both the Core i3-2125 and Core i7-640M share an identical 2-core/4-thread configuration. Boost clocks reach 3.3 GHz on the Core i3-2125 versus 3.46 GHz on the Core i7-640M — a 4.7% clock advantage for the Core i7-640M (base: 3.3 GHz vs 2.8 GHz). The Core i3-2125 uses the Sandy Bridge (2011−2013) architecture (32 nm), while the Core i7-640M uses Arrandale (2010−2011) (32 nm). In PassMark, the Core i3-2125 scores 2,082 against the Core i7-640M's 2,092 — a 0.5% lead for the Core i7-640M. L3 cache: 3 MB (total) on the Core i3-2125 vs 4 MB (total) on the Core i7-640M.

Feature	Core i3-2125	Core i7-640M
Cores / Threads	2 / 4	2 / 4
Boost Clock	3.3 GHz	3.46 GHz+5%
Base Clock	3.3 GHz+18%	2.8 GHz
L3 Cache	3 MB (total)	4 MB (total)+33%
L2 Cache	256 kB (per core)	256K (per core)
Process	32 nm	32 nm
Architecture	Sandy Bridge (2011−2013)	Arrandale (2010−2011)
PassMark	2,082	2,092
Geekbench 6 Single	499	—

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Memory & Platform

The Core i3-2125 uses the LGA1155 socket (PCIe 2.0), while the Core i7-640M uses PGA988 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1333 on the Core i3-2125 versus 1066 on the Core i7-640M — the Core i3-2125 supports 25% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i3-2125 supports up to 32 GB of RAM compared to 8 GB — 300% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: H61,H67,P67,Z68,B65,Q65,Q67,B75,Q75,H77,Z75,Z77 (Core i3-2125) and HM55,HM57,QM57 (Core i7-640M).

Feature	Core i3-2125	Core i7-640M
Socket	LGA1155	PGA988
PCIe Generation	PCIe 2.0	PCIe 2.0
Max RAM Speed	DDR3-1333+25%	1066
Max RAM Capacity	32 GB+300%	8 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	16	16

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Advanced Features

Neither processor supports overclocking. Virtualization support: VT-x, EPT (Core i3-2125) vs true (Core i7-640M). Both include integrated graphics — HD Graphics 3000 (Core i3-2125) and Intel HD Graphics (Ironlake) (Core i7-640M) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Core i3-2125 targets Budget Desktop. Direct competitor: Core i3-2125 rivals A8-3850; Core i7-640M rivals Core 2 Duo T9600.

Feature	Core i3-2125	Core i7-640M
Integrated GPU	Yes	Yes
IGPU Model	HD Graphics 3000	Intel HD Graphics (Ironlake)
Unlocked	No	No
AVX-512	No	No
Virtualization	VT-x, EPT	true
Target Use	Budget Desktop	—