Intel Core 2 Quad Q9505

The Intel Core 2 Quad Q9505 is a desktop processor built on the Yorkfield architecture and fabricated on Intel's 45 nm process node. It offers 4 cores and 4 threads at a fixed 2.83 GHz base clock with no boost capability, backed by a 6 MB shared L2 cache and 64 KB of L1 cache per core. The chip carries a 95 W TDP, fits the Intel Socket 775 platform, and the benchmark database records it at the 50th percentile of all CPUs. Its production status is end-of-life, making it a legacy part in the current market.

Platform and Compatibility

The Q9505 uses Intel Socket 775, a platform that supported a wide range of Intel desktop processors across several generations. Memory support spans DDR1, DDR2, and DDR3, all accessed through a dual-channel memory bus. The specific memory type used depends on the motherboard, since the Q9505 itself does not dictate the memory standard; the board's chipset and slots determine whether DDR1, DDR2, or DDR3 modules are installed. ECC memory is not supported, so this is a consumer-oriented part without server-grade reliability features. PCIe connectivity is Gen 2, which is typical for the era and sufficient for the graphics cards and expansion cards of the time.

Integrated graphics are not built into the processor die. They appear only on certain motherboards as a chipset feature, meaning most systems will require a discrete GPU for display output. The die itself measures 164 mm² and contains 456 million transistors, a compact size for a quad-core on the 45 nm node. The 45 nm process was a significant efficiency improvement over earlier parts, allowing higher clock speeds and lower power draw. The upgrade path for the Q9505 is limited by its end-of-life status. There is no forward upgrade to newer sockets, but within Socket 775, users can swap in other compatible Core 2 processors, provided the motherboard's chipset and BIOS support them. This makes the Q9505 a viable drop-in upgrade for older Socket 775 systems that previously ran dual-core or single-core parts.

How It Compares

The database lists no nearest rivals for the Q9505, so direct comparison against specific competitors is not possible from the recorded data. Instead, the percentile field provides the positioning: the Q9505 sits at the 50th percentile of all CPUs in the database. That is a median position, meaning half of the processors in the database outperform it and half underperform it. In the context of its own generation, the Q9505 is a quad-core part with 4 threads, which places it above the dual-core processors that were common in the early Core 2 era. The fixed 2.83 GHz clock with no boost means it cannot reach higher frequencies for single-threaded tasks, a limitation that later processors with turbo functionality do not have.

Against modern desktop CPUs, the data clearly shows the Q9505 is far behind, as expected for an end-of-life part. Against other Socket 775 processors, it is a solid quad-core option, though it lacks the higher clock speeds and larger caches of some later parts in the same socket. The 50th percentile ranking suggests a balanced mid-range performer for its time: not a flagship, but not an entry-level chip either. Its 4 cores and 4 threads at 2.83 GHz, combined with a 6 MB shared L2 cache, make it a reasonable all-rounder for the applications of its era. Users comparing it to newer processors should expect a significant performance gap, but within the Socket 775 ecosystem, it holds its own as a quad-core workhorse.

Power and Thermals

The Q9505 has a 95 W TDP, which is modest for a quad-core desktop processor from the Core 2 generation. The 45 nm process node keeps thermal density manageable, and the 164 mm² die spreads heat across a reasonable surface area. A capable air cooler is sufficient for this chip; there is no need for liquid cooling or oversized heatsinks. The multiplier is locked, so overclocking is limited to raising the base clock through the motherboard, which will increase power draw and heat output. Even so, the 95 W TDP means most mid-range cooling solutions from the era will handle it without issue.

In a typical desktop chassis, the Q9505 will not stress the thermal envelope. The lack of a boost clock means power draw is steady under load rather than spiking, which simplifies cooling design. The 456 million transistors on 45 nm are efficient by the standards of the time, and the dual-channel memory bus does not add significant heat. For builders retrofitting an old Socket 775 system, a standard air cooler with adequate airflow will keep temperatures in check. The locked multiplier is the main constraint for enthusiasts, as it limits the ability to push the chip beyond its stock 2.83 GHz without adjusting the base clock, which can introduce system instability if pushed too far.

FAQ

Q: What socket does the Q9505 use? A: Intel Socket 775.

Q: What memory types does it support? A: DDR1, DDR2, and DDR3, through a dual-channel memory bus. ECC memory is not supported.

Q: Does the processor include integrated graphics? A: No. Integrated graphics appear only on certain motherboards as a chipset feature, so a discrete GPU is required for display output on most boards.

Q: Is the multiplier unlocked? A: No, the multiplier is locked, limiting overclocking to base clock adjustments.

Q: Is the Q9505 still in production? A: No, it is end-of-life.

Q: What is the part number? A: SLGYY.

Q: What process node is used? A: 45 nm, with 456 million transistors on a 164 mm² die.

Q: How many cores and threads does it have? A: 4 cores and 4 threads at a 2.83 GHz base clock.

Benchmark Performance

The average benchmark score for the Q9505 is recorded as 0, which indicates that no meaningful benchmark results are available in this database for this processor. The percentile field, however, places it at the 50th percentile of all CPUs, confirming a median standing. Without rival delta values, the analysis must rely on the architectural specifications: 4 cores, 4 threads, a 2.83 GHz base clock with no boost, a 6 MB shared L2 cache, and 64 KB of L1 cache per core.

In multithreaded workloads, the 4 cores and 4 threads give the Q9505 an advantage over dual-core processors of the same era, but the lack of a boost clock means it cannot reach higher frequencies for single-threaded tasks. The dual-channel memory bus supports DDR1, DDR2, or DDR3 depending on the motherboard, which affects memory bandwidth and, in turn, overall system performance. The 6 MB shared L2 cache is generous for the time and helps with cache-sensitive workloads such as database queries and certain scientific applications. The 64 KB L1 cache per core is standard for the Core 2 architecture and provides low-latency access to frequently used data.

Overall, the data shows a mid-pack performer: capable for its generation, but clearly outclassed by modern processors. The 50th percentile ranking means users should expect performance roughly in the middle of the database's CPU population. For its era, the Q9505 delivered solid quad-core performance at a fixed 2.83 GHz, and the 6 MB L2 cache helped mitigate the lack of a boost clock in some workloads. However, the absence of recorded benchmark scores means quantitative comparisons against specific rivals are not possible from this database. The 4-thread configuration also means it will struggle with heavily threaded modern applications, which typically expect more than 4 threads for smooth scaling.

Who Should Consider It

The Q9505 is best suited for legacy Socket 775 systems. For office work, web browsing, and older games, the 4 cores at 2.83 GHz are adequate, and the 6 MB shared L2 cache helps with everyday responsiveness. For modern creation workloads such as video editing, 3D rendering, or heavy multitasking, the data suggests the Q9505 will lag significantly behind current processors. Enthusiasts maintaining vintage builds will find it a reasonable quad-core upgrade over dual-core Socket 775 parts, providing more multithreaded capability without changing the platform. It is not a sensible choice for new builds, given its end-of-life status and median benchmark position. Users who need current performance should look elsewhere in the database. For those with an existing Socket 775 motherboard, however, the Q9505 offers a straightforward way to add quad-core performance without a platform overhaul.