Intel Core 2 Extreme QX9770 vs Intel Xeon E5530 Comparison

Where Each One Wins

The benchmark data is unusually one-sided here. The Intel Xeon E5530 wins every recorded head-to-head test against the Intel Core 2 Extreme QX9770, taking all five Cinebench comparisons. That does not mean the two chips are far apart in performance; the margins are consistently small, but they point in a single direction.

The largest advantage for the Xeon E5530 comes in Cinebench R20 multi-core, where it scores 977 against 963 for the Core 2 Extreme QX9770, a 1.5% lead. The smallest edge is in Cinebench R20 single-core, where the Xeon leads 137 to 136, a 0.7% gap. The other three tests sit between those extremes: Cinebench R15 multi-core shows 234 versus 231 (1.3% ahead), Cinebench R23 multi-core shows 2328 versus 2295 (1.4% ahead), and Cinebench R23 single-core shows 328 versus 324 (1.2% ahead).

The Xeon E5530 wins every test, but the wins are narrow. The Core 2 Extreme QX9770 does not take a single category. In terms of use-case splits, the multi-core tests favor the Xeon by slightly larger margins than the single-core tests, which suggests the Xeon's threading advantage matters more under sustained parallel loads. The QX9770 has 4 threads total, while the Xeon E5530 has 8 threads, and that difference shows up most clearly in Cinebench R20 multi-core, the test with the largest delta.

For workloads that stress all cores equally, the Xeon E5530 is the better pick by a modest but consistent amount. For lightly threaded tasks, the gap nearly disappears, but the Xeon still holds a lead. Neither chip offers a scenario where the QX9770 comes out ahead in the recorded data.

The Verdict

The data supports a clear conclusion: the Intel Xeon E5530 is the faster processor in every benchmark recorded. It wins all five head-to-head tests, and its average benchmark score of 801 sits above the QX9770's 790. That is a 1.4% difference in the aggregate, reinforced by a perfect 5-0 record in individual tests.

If you are choosing between these two for multi-threaded work, the Xeon E5530 is the safer pick. Its 8 threads versus 4 threads gives it a structural advantage in parallel workloads, and the Cinebench multi-core results confirm that advantage in practice. The Xeon also supports ECC memory, which matters for server or workstation environments where data integrity is a priority.

If you are choosing for single-threaded responsiveness, the two are nearly identical. The Xeon leads by 0.7% in Cinebench R20 single-core and 1.2% in Cinebench R23 single-core, but those margins are within run-to-run noise for most practical purposes. The QX9770 does have a higher base clock at 3.20 GHz versus 2.40 GHz, but that does not translate into a benchmark win in any recorded test.

The QX9770 is a desktop part with an unlocked multiplier, which means overclocking potential exists, but the database does not include any overclocked results. Based on stock measurements alone, the Xeon E5530 is the better performer. The QX9770 is not a bad chip; it simply loses every measured comparison.

Head-to-Head Benchmarks

The largest single win for the Xeon E5530 is in Cinebench R20 multi-core. The Xeon scores 977, the QX9770 scores 963, and the margin is 1.5%. That is the only test where the delta exceeds 1.4%, and it aligns with the thread count difference: 8 threads on the Xeon versus 4 threads on the QX9770.

Cinebench R23 multi-core shows a similar pattern. The Xeon scores 2328, the QX9770 scores 2295, and the gap is 1.4%. Cinebench R15 multi-core is close behind at 1.3%, with the Xeon at 234 and the QX9770 at 231.

Single-core results are tighter. In Cinebench R23 single-core, the Xeon scores 328 against 324, a 1.2% lead. In Cinebench R20 single-core, the Xeon scores 137 against 136, a 0.7% lead. The QX9770's higher base clock of 3.20 GHz does not overcome the Xeon's architectural efficiency in these tests.

Looking at the aggregate numbers, the Xeon E5530 averages 801 across its benchmark suite, while the QX9770 averages 790. The nearest rivals for the Xeon include the AMD A10-7700K and Intel Pentium Silver J5040, both at 801 (0% delta), plus the Intel Core i5-3320M at 803 (-0.2%) and AMD Ryzen 3 2200U at 805 (-0.5%). The QX9770's nearest rivals are the Intel Core 2 Extreme QX9650 at 789 (0.1% delta), AMD Opteron 3350 HE at 789 (0.1%), Intel Core i5-4210U at 788 (0.3%), and Intel Core i5-3610ME at 788 (0.3%). Both chips sit at the 21st percentile among all CPUs, meaning they are entry-level performers by modern standards, but the Xeon holds a consistent edge over its older rival.

FAQ

Q: Which processor wins in multi-core benchmarks?

A: The Intel Xeon E5530 wins every multi-core test recorded. It leads by 1.3% in Cinebench R15, 1.5% in Cinebench R20, and 1.4% in Cinebench R23 multi-core.

Q: Is the Core 2 Extreme QX9770 better in single-core performance?

A: No. The Xeon E5530 also wins both single-core tests, with a 0.7% lead in Cinebench R20 and a 1.2% lead in Cinebench R23 single-core. The QX9770 has a higher base clock at 3.20 GHz, but that does not produce a win in the recorded data.

Q: How do their average benchmark scores compare?

A: The Xeon E5530 has an average benchmark score of 801, while the Core 2 Extreme QX9770 averages 790. That is a 1.4% difference in the aggregate.

Q: What are the thread counts for each processor?

A: The Xeon E5530 has 4 cores and 8 threads. The Core 2 Extreme QX9770 has 4 cores and 4 threads.

Q: Do both processors support ECC memory?

A: No. The Xeon E5530 supports ECC memory, while the Core 2 Extreme QX9770 does not.

Q: Which chip has a higher TDP?

A: The Core 2 Extreme QX9770 has a TDP of 136 watts, compared to 80 watts for the Xeon E5530. The Xeon delivers better benchmark results while drawing less power according to the specifications.

Architecture Differences

The two processors come from different architectural families. The Xeon E5530 uses the Nehalem architecture with the Gainestown codename, while the Core 2 Extreme QX9770 uses the Core 2 architecture with the Yorkfield codename. Both are built on a 45 nm process at Intel's foundry, but the transistor counts and die sizes differ.

The Xeon E5530 packs 731 million transistors on a 263 mm² die. The QX9770 has 820 million transistors spread across two dies, each 107 mm², for a combined 214 mm². The higher transistor count on the QX9770 does not translate into better benchmark results, which suggests the Nehalem architecture is more efficient per transistor.

Cache configurations differ significantly. The Xeon E5530 has 64 KB of L1 per core and 256 KB of L2 per core, plus an 8 MB shared L3 cache. The QX9770 also has 64 KB of L1 per core, but its L2 is 12 MB shared with no L3 cache. The L3 cache on the Xeon helps with shared data across threads, which supports its multi-threaded performance.

Memory support is another major split. The Xeon E5530 uses DDR3 with a triple-channel memory bus and 25.6 GB/s of bandwidth. The QX9770 supports DDR1, DDR2, and DDR3 with a dual-channel memory bus, and the database does not list a bandwidth figure for it. The Xeon's triple-channel setup gives it more memory bandwidth, which matters for multi-core workloads that are memory-bound.

The Xeon E5530 supports ECC memory; the QX9770 does not. The Xeon is also a server/workstation part on Intel Socket 1366, while the QX9770 is a desktop part on Intel Socket 775. Both use PCIe Gen 2, and the QX9770 has integrated graphics available as a chipset feature on certain motherboards, while the Xeon has no integrated graphics listed.

Specification Differences

The two processors differ in several key specifications. The Xeon E5530 has a base clock of 2.40 GHz with a boost clock of 2.67 GHz. The Core 2 Extreme QX9770 has a base clock of 3.20 GHz and no boost clock listed. Despite the QX9770's higher base clock, the Xeon wins all benchmark comparisons.

Thread counts differ: 8 threads on the Xeon versus 4 threads on the QX9770. TDP also differs substantially, with the Xeon at 80 watts and the QX9770 at 136 watts. The Xeon is more power-efficient per unit of performance in the recorded data.

Memory support differs as well. The Xeon uses DDR3 with a triple-channel bus and 25.6 GB/s bandwidth. The QX9770 supports DDR1, DDR2, and DDR3 with a dual-channel bus and no listed bandwidth. ECC memory is supported on the Xeon only.

The Xeon E5530 has an L3 cache of 8 MB shared, while the QX9770 has no L3 cache but a larger shared L2 at 12 MB. The Xeon's launch MSRP was $530; the QX9770 has no launch MSRP listed in the database. The Xeon's multiplier is locked, while the QX9770's multiplier is unlocked. The Xeon was released on 2009-03-29, and the QX9770 was released on 2008-03-23. The part numbers are SLBF7 for the Xeon and SLAWM for the QX9770. Both are end-of-life products, and both sit at the 21st percentile among all CPUs in the database.