Intel Core 2 Extreme QX9770 vs Intel Core i3-7100 Comparison

Head-to-Head Benchmarks

The benchmark data tells a surprisingly close story between these two desktop processors, separated by nearly nine years of Intel silicon. The Core i3-7100 takes four of the five head-to-head Cinebench matchups, but the margins are razor-thin throughout. In the Cinebench R15 multicore test, the i3-7100 edges out the QX9770 by a single point, 232 to 231, a delta of just 0.4%. The R20 multicore run shows a similar pattern: the i3-7100 scores 970 against 963 for the Core 2 Extreme, a 0.7% advantage. The R23 multicore result continues the trend, with the i3-7100 posting 2310 versus 2295, a 0.6% lead.

Single-core performance is where the newer architecture should theoretically shine, yet the results are nearly identical. In Cinebench R20 single-core, both chips score exactly 136, a dead heat with a 0% delta. The R23 single-core test gives the i3-7100 a marginal win, 326 to 324, again just 0.6% apart. The only benchmark where the QX9770 claims victory is that R20 single-core tie, which the data records as a win for the older chip due to the tiebreak rule. So while the i3-7100 wins four of five matchups, the average score difference across all tests is less than one percent.

Looking at the broader benchmark context, the QX9770 holds an average benchmark score of 790, while the i3-7100 sits at 781. That places the Core 2 Extreme about 1.2% ahead in aggregate performance, despite losing most of the individual Cinebench tests. Both chips land in the 21st percentile of all CPUs, meaning they occupy essentially the same performance tier in the global database. The nearest rivals for the QX9770 include the Core 2 Extreme QX9650 and the AMD Opteron 3350 HE, both within 0.1% of its average score. The i3-7100's closest competitors are the AMD A10-5800K and Intel Pentium G4520, each about 0.4% behind.

The practical takeaway from the head-to-head data is that these two chips deliver nearly interchangeable Cinebench performance. The i3-7100's higher clock speed and modern architecture give it a slight edge in most renders, but the QX9770's four physical cores help it stay competitive in multi-threaded workloads. Neither chip dominates the other by any meaningful margin, which is remarkable given the generational gap.

FAQ

Q: Which processor has the higher average benchmark score?

A: The Intel Core 2 Extreme QX9770 has an average benchmark score of 790, compared to 781 for the Intel Core i3-7100. That is a difference of about 1.2%, placing both processors in the 21st percentile of all CPUs.

Q: How do the two chips compare in Cinebench R23 multi-core performance?

A: The Intel Core i3-7100 scores 2310 in Cinebench R23 multi-core, while the Core 2 Extreme QX9770 scores 2295. The i3-7100 leads by 0.6%, which is a difference of just 15 points.

Q: Is there any benchmark where the Core 2 Extreme QX9770 wins outright?

A: The QX9770 is credited with a win in Cinebench R20 single-core, where both processors score exactly 136. That tie goes to the older chip in the head-to-head data, giving it one win versus four for the i3-7100.

Q: What kind of memory support does each processor offer?

A: The Core 2 Extreme QX9770 supports DDR1, DDR2, and DDR3 memory in a dual-channel configuration. The Core i3-7100 supports DDR4 memory, also dual-channel, with a peak memory bandwidth of 38.4 GB/s.

Q: Do either of these processors include integrated graphics?

A: The Core i3-7100 includes Intel HD 630 integrated graphics. The Core 2 Extreme QX9770 has integrated graphics only as a chipset feature, meaning it depends on the specific motherboard used.

Q: Which processor has a higher base clock speed?

A: The Intel Core i3-7100 has a base clock of 3.90 GHz, while the Core 2 Extreme QX9770 has a base clock of 3.20 GHz. Neither processor supports boost clocks according to the data.

The Verdict

The benchmark results indicate that the Intel Core i3-7100 is the better choice for most modern workloads, though not by a wide margin. It wins four of the five head-to-head Cinebench tests, including the multi-core tests that traditionally favor additional physical cores. The i3-7100's lead in Cinebench R15 multi-core (232 vs 231), R20 multi-core (970 vs 963), R23 multi-core (2310 vs 2295), and R23 single-core (326 vs 324) shows consistent, if modest, superiority across rendering tasks.

The Core 2 Extreme QX9770 still holds a slight edge in average benchmark score (790 vs 781) and offers four physical cores versus the i3-7100's two cores with four threads. For users running heavily threaded applications that scale with core count, the QX9770 remains competitive, as evidenced by its performance against the i3-7100 in multi-core Cinebench runs. Its unlocked multiplier also allows overclocking, which the locked i3-7100 does not offer.

However, the i3-7100 brings modern platform advantages that the QX9770 cannot match. It supports DDR4 memory with 38.4 GB/s of bandwidth, includes Intel HD 630 integrated graphics, and runs on the Socket 1151 platform with PCIe Gen 3 support. The QX9770 relies on Socket 775, older DDR1/DDR2/DDR3 memory, and PCIe Gen 2. The i3-7100 also has a much lower TDP of 51 watts versus 136 watts for the QX9770, making it far more energy-efficient.

For a new build or an upgrade path, the Core i3-7100 is the logical pick. It delivers comparable or better Cinebench performance in nearly every test, uses less power, and supports modern memory and PCIe standards. The Core 2 Extreme QX9770 remains a viable option only for those already invested in the Socket 775 platform who want a high-end end-of-life upgrade, given its four physical cores and overclocking headroom. But for anyone choosing between these two today, the data points firmly toward the i3-7100.

Specification Differences

The two processors differ in almost every major specification category. The Core 2 Extreme QX9770 has 4 cores and 4 threads, while the Core i3-7100 has 2 cores and 4 threads thanks to Hyper-Threading. Base clock speeds differ significantly: the QX9770 runs at 3.20 GHz, while the i3-7100 runs at 3.90 GHz. Neither processor has a boost clock.

Thermal design power tells a stark story. The QX9770 has a TDP of 136 watts, while the i3-7100 draws just 51 watts, making the newer chip more than 60% more power-efficient on paper. The sockets are incompatible: the QX9770 uses Intel Socket 775, while the i3-7100 uses Intel Socket 1151.

Cache configurations also differ substantially. Both have 64 KB of L1 cache per core. The QX9770 has 12 MB of shared L2 cache, while the i3-7100 has 256 KB of L2 cache per core. The i3-7100 adds a 3 MB shared L3 cache, while the QX9770 has no L3 cache at all.

Memory support diverges completely. The QX9770 supports DDR1, DDR2, and DDR3 memory, while the i3-7100 supports DDR4. Both use dual-channel memory buses, but only the i3-7100 lists a memory bandwidth figure of 38.4 GB/s. Neither processor supports ECC memory.

PCIe generations differ: the QX9770 supports PCIe Gen 2, while the i3-7100 supports PCIe Gen 3 with 16 lanes from the CPU. Integrated graphics are present only on the i3-7100, with Intel HD 630, whereas the QX9770 relies on chipset features on certain motherboards.

The production status and release dates reflect the generational gap. The QX9770 is end-of-life and was released in March 2008. The i3-7100 is active and was released in January 2017. The QX9770 has an unlocked multiplier, while the i3-7100's multiplier is locked.

Architecture Differences

The architectural gap between these two processors is immense. The Core 2 Extreme QX9770 uses the Core 2 architecture with the Yorkfield codename, built on a 45 nm process node. The Core i3-7100 uses the Kaby Lake architecture, built on a 14 nm process node. The transistor counts reflect the process difference: the QX9770 packs 820 million transistors across a die size of 2x 107 mm², while the i3-7100's transistor count and die size are not listed in the data.

The QX9770 is a quad-core design with four physical cores and no simultaneous multithreading. The i3-7100 is a dual-core design with Hyper-Threading, giving it four threads. This means the i3-7100 can process four threads simultaneously, matching the QX9770's thread count despite having half the physical cores.

Cache architecture differs fundamentally between the generations. The QX9770 uses a large shared L2 cache of 12 MB, which was a hallmark of the Core 2 architecture. The i3-7100 uses a smaller per-core L2 cache of 256 KB, supplemented by a 3 MB shared L3 cache. This reflects a shift toward more hierarchical cache designs in later Intel architectures.

The memory controllers differ as well. The QX9770 supports a broad range of older memory standards (DDR1, DDR2, DDR3), while the i3-7100 is designed exclusively for DDR4. The i3-7100's memory bandwidth of 38.4 GB/s is a listed specification, while the QX9770's memory bandwidth is not provided in the data.

PCIe support also shows the generational leap. The QX9770 offers PCIe Gen 2, while the i3-7100 offers PCIe Gen 3 with 16 lanes from the CPU. This doubles the available bandwidth for graphics cards and NVMe storage on the newer platform.

Integrated graphics represent another major architectural difference. The i3-7100 includes Intel HD 630 graphics, making it a complete system-on-chip for basic display output. The QX9770 has no integrated graphics of its own; it relies on chipset-based graphics solutions on certain motherboards, which was typical for high-end desktop processors of its era.

The unlocked multiplier on the QX9770 reflects its Extreme Edition positioning, allowing enthusiasts to overclock by adjusting the multiplier. The i3-7100, as a mainstream part, has a locked multiplier. The process node shrink from 45 nm to 14 nm enables the i3-7100 to achieve higher clock speeds (3.90 GHz vs 3.20 GHz) while consuming far less power (51 watts vs 136 watts). This architectural efficiency is the primary reason the i3-7100 can match or slightly exceed the QX9770's performance with half the physical cores.