Intel Core i7-720QM

The Intel Core i7-720QM is a mobile processor from Intel's Nehalem generation, released in September 2009 with a launch MSRP of $364. It packs 4 cores and 8 threads, running at a base clock of 1.60 GHz and a boost clock of 2.80 GHz. Built on a 45 nm process with 774 million transistors on a 296 mm² die, it uses the Intel Socket G1 and targets laptops. With an average benchmark score of 512, it sits in the 9th percentile of all CPUs in the database—meaning 91% of recorded processors outperform it. Its nearest rivals all cluster within a single percentage point, making it a member of a tightly grouped low-performance tier.

Benchmark Performance

The i7-720QM's benchmark results are consistently modest across both legacy and current test suites. In Cinebench R15, it scores 142 in multicore. Cinebench R20 yields 594 multicore and 83 single-core. Cinebench R23 reports 1416 multicore and 199 single-core. Geekbench shows 846 multicore and 302 single-core. These numbers place the chip at the 9th percentile, indicating that it is among the slower processors in the database. Its average score of 512 is nearly indistinguishable from its nearest rivals: the Intel Xeon E5405 averages 513 (0.1% faster), the AMD Phenom II X3 B75 averages 515 (0.7% faster), the Intel Xeon L5335 averages 508 (0.9% slower), and the Intel Core i3-3110M averages 517 (0.9% faster). The deltas are tiny—well under 1%—so the i7-720QM is effectively performance-equivalent to these parts, despite their different architectures and market positions. The single-core scores are especially weak: Geekbench single-core at 302 and Cinebench R20 single-core at 83. This suggests that any workload relying on a single thread will be severely limited, while multi-threaded tasks will see relatively better—though still low—throughput.

Platform and Compatibility

The i7-720QM uses Intel Socket G1, a mobile-specific socket that is not shared with any other processor generation. It is built on the Nehalem architecture (codename Clarksfield) and fabricated on a 45 nm process. The chip integrates 774 million transistors on a 296 mm² die, with a cache hierarchy of 64 KB L1 per core, 256 KB L2 per core, and a shared 6 MB L3 cache. Memory support is limited to DDR3 over a dual-channel interface, delivering a theoretical bandwidth of 21.3 GB/s; ECC memory is not supported. The CPU provides 16 PCIe Gen 2 lanes, but these are CPU-only—there is no integrated graphics, so a discrete GPU is mandatory for any display output. The multiplier is locked, preventing overclocking. As an end-of-life mobile part, there is no upgrade path within this platform; the socket is obsolete and no future CPUs will fit it. This means any system built around the i7-720QM is effectively at its performance ceiling.

Power and Thermals

The i7-720QM has a TDP of 45 watts, which places it in a moderate power class for a mobile processor. This thermal envelope allows for a compact cooling solution typical of larger laptops, but it is not suited for ultra-thin designs. The base clock of 1.60 GHz and boost clock of 2.80 GHz indicate that the chip can significantly increase its frequency under load, but that also means higher power draw and heat generation during boost. The 45 nm process, with 774 million transistors, is relatively power-hungry by modern standards, but the 45W TDP is manageable with a capable air cooler or heatpipe solution. The lack of integrated graphics means a discrete GPU must be included, which adds to the overall system power draw and thermal load. No specific cooler requirements are given, but the TDP class implies that a standard laptop cooling module is sufficient.

FAQ

Q: Does the Intel Core i7-720QM have integrated graphics?

A: No, it has no integrated graphics. A discrete GPU is required for any video output.

Q: What memory type does it support?

A: It supports DDR3 memory in a dual-channel configuration, with a peak bandwidth of 21.3 GB/s.

Q: Is the multiplier unlocked for overclocking?

A: No, the multiplier is locked, preventing user overclocking.

Q: What socket does it use?

A: It uses Intel Socket G1, a mobile-specific socket.

Q: What is the production status?

A: It is end-of-life, meaning it is no longer manufactured.

Q: What is the process node?

A: It is fabricated on a 45 nm process.

How It Compares

The Intel Xeon E5405 averages 513, which is 0.1% faster than the i7-720QM. The difference is negligible, placing both processors in the same performance tier. Despite being a server-oriented chip, its performance is essentially identical to the mobile i7.

The AMD Phenom II X3 B75 averages 515, 0.7% faster. Even though it has only three cores compared to the i7's four, it manages to edge ahead by a hair, underscoring the i7's weak per-core performance.

The Intel Xeon L5335 averages 508, which the i7-720QM leads by 0.9%. This is the only rival in the group that the i7 beats, and the margin is still under a percentage point. The two are effectively tied.

The Intel Core i3-3110M averages 517, 0.9% faster. This is a newer mobile chip, but the performance gap is still minuscule. The i7-720QM holds its own against a much more modern part, though only just.

Single-Thread vs Multi-Thread Behavior

The i7-720QM's multi-threaded scores are dramatically higher than its single-threaded scores. In Cinebench R23, the multicore score is 1416 versus 199 single-core; in Geekbench, 846 versus 302. This indicates that the processor's 8 threads are well-utilized in parallel workloads, but its individual cores are weak. The single-core performance is low enough that tasks like web browsing, office productivity, or legacy applications that rely on one thread will feel sluggish. Conversely, rendering, video encoding, and other multi-threaded tasks will see better relative performance, though still low in absolute terms. The 4-core/8-thread configuration with a 6 MB shared L3 cache helps scale across cores, but the low base clock of 1.60 GHz limits overall throughput. The boost clock of 2.80 GHz provides a temporary lift, but it is not sustained across all cores under heavy load.

Who Should Consider It

Given its 9th percentile ranking and low single-core scores, the i7-720QM is not suitable for demanding single-threaded applications. It is best suited for multi-threaded workloads that can utilize all 8 threads, such as batch rendering or data processing, where its modest multicore scores (Cinebench R23 1416) can be leveraged. For office tasks that are lightly threaded, the low single-core performance will be a bottleneck. Gamers should avoid it, as modern games typically rely on strong single-core performance. As a mobile part from 2009, it is now obsolete, but it may still serve in a legacy laptop for basic multi-threaded number crunching. The lack of integrated graphics means any system must have a discrete GPU, adding to the overall power draw. For anyone considering this CPU today, the data shows it is only viable for very specific parallel workloads on old hardware, and even then, the performance is far below what even entry-level modern chips offer.