Core 2 Duo T5270 vs Pentium D 820

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 2 Duo T5270 vs Pentium D 820 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 2 Duo T5270 vs Pentium D 820: Pros, Cons & Final Verdict

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

Core 2 Duo T5270

2008

Why buy it

✅+1.1% higher PassMark.

Trade-offs

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

Pentium D 820

2005

Why buy it

Trade-offs

❌Lower PassMark (1,412 vs 1,427).
❌Launch MSRP is still $241 MSRP, while Core 2 Duo T5270 mostly shows up through inconsistent older-market listings.

Quick Answers

So, is Core 2 Duo T5270 better than Pentium D 820?

It depends on what you want from the system. For gaming, Pentium D 820 is ahead with a 0.2% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core 2 Duo T5270 pulls ahead with 1.1% better PassMark.

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

For streaming, content creation, and heavier multitasking, Core 2 Duo T5270 is the stronger fit. You are getting 1.1% better PassMark, backed by 2 cores and 2 threads.

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

Core 2 Duo T5270 is still the much better call for a fresh build. Core 2 Duo T5270 comes in at an unclear MSRP at unclear MSRP versus $241 MSRP, and it still gives you 1.1% better PassMark. Pentium D 820 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2005 platform. Even with 100.0% better value on paper (5.9 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA775.

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

Core 2 Duo T5270 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2008 vs 2005) and more multi-core headroom with 2 cores / 2 threads instead of 2/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core 2 Duo T5270 vs Pentium D 820 Technical Specifications

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

Core 2 Duo T5270

The Core 2 Duo T5270 is manufactured by Intel. It was released in 2008-01-01. It is based on the Merom-2048 (2006−2008) architecture. It features 2 cores and 2 threads. Base frequency is 1.4 GHz, with boost up to 1.4 GHz. L3 cache: 2 MB L2 Cache. L2 cache: 2 MB. Built on 65 nm process technology. Socket: PGA478. Thermal design power (TDP): 35 Watt. Passmark benchmark score: 1,427 points. Launch price was $249.

Pentium D 820

The Pentium D 820 is manufactured by Intel. It was released in 2007-01-01. It is based on the NetBurst (2000−2006) architecture. It features 2 cores and 2 threads. Base frequency is 2.8 GHz, with boost up to 2.8 GHz. L3 cache: 0 kB. L2 cache: 2 MB. Built on 90 nm process technology. Socket: LGA775. Thermal design power (TDP): 95 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 1,412 points. Launch price was $69.

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Processing Power

Both the Core 2 Duo T5270 and Pentium D 820 share an identical 2-core/2-thread configuration. Boost clocks reach 1.4 GHz on the Core 2 Duo T5270 versus 2.8 GHz on the Pentium D 820 — a 66.7% clock advantage for the Pentium D 820 (base: 1.4 GHz vs 2.8 GHz). The Core 2 Duo T5270 uses the Merom-2048 (2006−2008) architecture (65 nm), while the Pentium D 820 uses NetBurst (2000−2006) (90 nm). In PassMark, the Core 2 Duo T5270 scores 1,427 against the Pentium D 820's 1,412 — a 1.1% lead for the Core 2 Duo T5270. L3 cache: 2 MB L2 Cache on the Core 2 Duo T5270 vs 0 kB on the Pentium D 820.

Feature	Core 2 Duo T5270	Pentium D 820
Cores / Threads	2 / 2	2 / 2
Boost Clock	1.4 GHz	2.8 GHz+100%
Base Clock	1.4 GHz	2.8 GHz+100%
L3 Cache	2 MB L2 Cache	0 kB
L2 Cache	2 MB	2 MB
Process	65 nm-28%	90 nm
Architecture	Merom-2048 (2006−2008)	NetBurst (2000−2006)
PassMark	1,427+1%	1,412
Geekbench 6 Single	—	166

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Memory & Platform

The Core 2 Duo T5270 uses the PGA478 socket (PCIe 1.1), while the Pentium D 820 uses LGA775 (PCIe 1.1) — making them incompatible on the same motherboard.