Intel Core i7-3820QM

The Intel Core i7-3820QM is a 2012 mobile processor built on the 22 nm Ivy Bridge architecture, featuring 4 cores and 8 threads via Hyper-Threading. With a base clock of 2.70 GHz and a boost clock of 3.70 GHz, it sits in the 45 W TDP class, making it suitable for larger laptops and mobile workstations of its era. Benchmark data shows an average score of 1363, placing it at the 37th percentile of all CPUs — meaning it outperforms roughly a third of the processors in the database. This is a part that was once a high-end mobile option but now occupies a distinctly mid-range position, trading blows with desktop-class parts from a few years later.

Who Should Consider It

The benchmark profile of the i7-3820QM points to a processor best suited for legacy productivity workflows rather than modern heavy lifting. Its Cinebench R23 multi-core score of 4763 and Geekbench multi-core score of 2041 indicate that it can handle everyday office tasks, spreadsheet work, and light coding without major complaints, but it will struggle with contemporary content creation workloads. For users who need a machine for web browsing, document editing, and media playback, the 4-core/8-thread configuration provides enough headroom for comfortable multitasking, though single-core performance is a limiting factor.

Gamers should temper expectations significantly. The Cinebench R23 single-core score of 672 and Geekbench single-core score of 601 are low by modern standards, meaning that CPU-bound titles will likely see frame rate drops. Older games from the 2012–2015 era, however, may run acceptably, as the processor was designed for that generation of software. The integrated Intel HD 4000 graphics further limits gaming to very light or older titles, so a discrete GPU would be mandatory for any serious gaming use.

For creation workloads like video editing, 3D rendering, or large-scale compilation, the data suggests this chip is not a primary choice. Its Cinebench R15 multi-core score of 480 is roughly one-quarter of what a modern mid-range desktop processor achieves, and the R20 score of 2000 reinforces that picture. The processor can complete small renders or short exports, but users with regular creation demands would find the wait times excessive. In short, the i7-3820QM is a viable option only for basic office use, legacy software, and light multitasking on a budget-recycled laptop.

Power and Thermals

The 45 W TDP places the i7-3820QM firmly in the standard mobile performance segment, which is a notable consideration for thermal design. A 45 W part typically requires a dedicated cooling solution with a heat pipe and a fan capable of moving a moderate volume of air; it is not suitable for ultra-thin or fanless chassis. In practice, this means the processor belongs in a larger laptop body where the cooling system can sustain sustained loads without excessive throttling.

The 22 nm process node helps keep power density in check, but the 4-core/8-thread design can still generate meaningful heat under full load. During multi-threaded tasks like Cinebench R23, the processor will draw close to its TDP, and the cooling solution must be able to dissipate that heat continuously. A capable dual-heatpipe cooler with a decent fan is the implied minimum; anything less will cause the boost clock of 3.70 GHz to drop quickly under sustained load.

Idle power consumption is modest given the age of the architecture, but the lack of modern power management features means battery life will be shorter than on newer equivalents. For users repurposing an old laptop with this chip, ensuring the thermal paste is fresh and the fan vents are clear is essential to maintain consistent performance. The data indicates that thermals are manageable within the intended chassis class, but this is not a processor that rewards passive or minimalist cooling.

How It Compares

The nearest rival, the Intel Core i5-6500T, scores 1361 on average, which is 0.2% behind the i7-3820QM’s 1363. This is a statistical tie, but the comparison is revealing: the i5-6500T is a desktop-class chip from 2015 with a lower TDP, yet the older mobile i7 matches it in aggregate benchmarks. The i7-3820QM benefits from Hyper-Threading, which helps in multi-threaded tests, but the newer architecture of the i5-6500T closes the gap in single-thread performance.

The Intel Core i5-6500TE is another near-identical rival, also scoring 1360 with a 0.2% delta. This embedded variant of the i5-6500T shares the same architectural advantages and presents the same trade-off: the i7-3820QM competes on equal footing in overall scores, but the i5-6500TE likely offers better power efficiency per clock due to its newer design. For users choosing between them, the i7-3820QM’s higher thread count is the main advantage.

The Intel Xeon W-2104, a workstation-focused part, scores 1360 as well, again 0.2% behind. This comparison highlights the i7-3820QM’s surprising competitiveness against a Xeon from a later generation. The Xeon W-2104 has 4 cores without Hyper-Threading, so the i7-3820QM’s 8 threads allow it to keep pace in multi-threaded workloads despite being older. In single-thread tests, the Xeon’s newer architecture gives it an edge, but the aggregate score shows parity.

Finally, the Intel Xeon E3-1226 v3 scores 1360, matching the other rivals with a 0.2% delta. This is a Haswell-era desktop Xeon with 4 cores and no Hyper-Threading. The i7-3820QM’s 8 threads let it match the Xeon’s multi-core performance, but the Xeon’s higher clock speeds in single-thread tasks likely give it a slight advantage there. Overall, the data shows the i7-3820QM is a competitive mid-range part when compared to these later desktop and embedded chips, but it never exceeds them by more than a rounding error.

FAQ

Q: What is the average benchmark score of the Intel Core i7-3820QM?

A: The average benchmark score across the recorded tests is 1363, placing it at the 37th percentile of all CPUs in the database.

Q: How does the i7-3820QM perform in Cinebench R23?

A: It scores 4763 in multi-core and 672 in single-core, indicating moderate multi-threaded capability but weak single-thread performance relative to modern processors.

Q: Does the i7-3820QM support ECC memory?

A: No, ECC memory is not supported; the processor uses dual-channel memory without error correction.

Q: What is the TDP of this processor and what cooling does it require?

A: The TDP is 45 W, which implies a standard mobile cooling solution with a heat pipe and fan, not a passive or ultra-thin design.

Q: When was the i7-3820QM released?

A: The release date is 2012-04-28, and it is based on the Ivy Bridge architecture with a 22 nm process node.

Q: How does it compare to the Intel Core i5-6500T?

A: The i7-3820QM scores 1363, which is 0.2% higher than the i5-6500T’s 1361, making them effectively equal in average performance.

Benchmark Performance

The benchmark data for the i7-3820QM reveals a processor that punches at its weight class but no higher. In Cinebench R15, the multi-core score is 480 and single-core is 67; the multi-core result is 7.2 times the single-core score, showing that the 8 threads scale well with the 4 physical cores. The R20 results follow a similar pattern: 2000 multi-core versus 282 single-core, a ratio of 7.1. These ratios are consistent, indicating that the processor’s thread scaling is efficient for its architecture.

The Cinebench R23 numbers are the most telling — 4763 multi-core and 672 single-core. The multi-core score is 7.1 times the single-core, confirming that Hyper-Threading provides a substantial boost in heavily threaded workloads. However, the absolute single-core score of 672 is low; modern desktop processors often exceed 2000 in this test, meaning the i7-3820QM is at a significant disadvantage in any application that relies on single-thread speed, such as older games or lightly threaded productivity apps.

Geekbench results reinforce the multi-core advantage. The multi-core score of 2041 is 3.4 times the single-core score of 601, a lower ratio than in Cinebench, which suggests that Geekbench’s workload mix is less sensitive to thread count. This indicates that real-world applications with mixed thread usage will see a smaller benefit from the 8 threads than pure render workloads.

Comparing to rivals, the 0.2% delta with each of the four nearest competitors is within noise margins, but the context matters. The i5-6500T, i5-6500TE, Xeon W-2104, and Xeon E3-1226 v3 all score between 1360 and 1361, while the i7-3820QM scores 1363. The i7-3820QM edges out all four by a hair, which is remarkable given that three of these rivals are desktop parts from 2014–2017. The i7-3820QM’s 8 threads compensate for its older Ivy Bridge cores, allowing it to hold its own in aggregate benchmarks despite losing in single-thread tests.

Single-Thread vs Multi-Thread Behavior

The split between single-thread and multi-thread performance is the defining characteristic of the i7-3820QM. Single-thread scores are weak: Cinebench R15 at 67, R20 at 282, and R23 at 672, with Geekbench at 601. These numbers place the processor in the bottom quartile of modern CPUs, which is expected for a 2012 mobile chip. Any workload that runs on one or two threads — such as web browsing with complex JavaScript, document formatting, or legacy games — will feel sluggish compared to even a modest modern desktop processor.

Multi-thread performance, by contrast, is respectable for the era. The Cinebench R23 multi-core score of 4763 is 7.1 times the single-core score, demonstrating that the 8 threads are effectively utilized. This translates to decent performance in video encoding, batch photo processing, or compiling code — tasks that can spread across all threads. The Geekbench multi-core score of 2041, while lower in absolute terms, still shows a 3.4 times improvement over single-core, indicating that the thread scaling is real but workload-dependent.

For users, the practical implication is that the i7-3820QM should be used for tasks that are explicitly multi-threaded. Running a full render or a multi-threaded benchmark will keep all 8 threads busy and deliver acceptable results — roughly comparable to a mid-range desktop processor from 2015. But interactive use, where the user is waiting for a response from the CPU, will expose the weak single-thread performance. The 37th percentile ranking reflects this duality: the processor is dragged down by its single-thread scores but lifted by its multi-thread capability.

The nearest rivals all show a similar pattern, but with a crucial difference. The i5-6500T, for example, has a newer architecture that boosts single-thread performance, even though it lacks Hyper-Threading. In a mixed workload, the i5-6500T would likely feel snappier in everyday use, while the i7-3820QM would pull ahead in heavily threaded tasks. The 0.2% aggregate delta masks this behavioral difference, so users should choose based on their specific workload mix rather than the overall score.