Intel Core 5 223PQE vs Intel Core Ultra 7 266V Comparison

FAQ

Q: What is the core and thread configuration difference between the Intel Core 5 223PQE and the Intel Core Ultra 7 266V?

A: The Intel Core 5 223PQE has 8 cores and 16 threads, while the Intel Core Ultra 7 266V has 8 cores and 8 threads. The Core 5 223PQE therefore supports twice as many threads, which benefits heavily parallel workloads.

Q: How do the cache sizes compare between the two processors?

A: The Intel Core 5 223PQE has 80 KB of L1 cache per core and 2 MB of L2 cache per core, with 24 MB of shared L3 cache. The Intel Core Ultra 7 266V has 192 KB of L1 cache per core and 2.5 MB of L2 cache per core, with 12 MB of shared L3 cache. The Core 5 223PQE has twice the L3 cache, while the Core Ultra 7 266V has larger per-core L1 and L2 caches.

Q: What is the difference in process node and foundry?

A: The Intel Core 5 223PQE is built on Intel's 10 nm process node, while the Intel Core Ultra 7 266V uses TSMC's 3 nm process node. The Core Ultra 7 266V is manufactured on a more advanced process.

Q: Which processor supports ECC memory?

A: The Intel Core 5 223PQE supports ECC memory, while the Intel Core Ultra 7 266V does not. This makes the Core 5 223PQE more suitable for reliability-critical applications.

Q: What is the memory bandwidth difference?

A: The Intel Core 5 223PQE has a dual-channel memory bus with 89.6 GB/s bandwidth, supporting DDR4 and DDR5. The Intel Core Ultra 7 266V also has a dual-channel bus but supports LPDDR5X with 136.5 GB/s bandwidth, which is significantly higher.

Q: How do the integrated graphics differ?

A: The Intel Core 5 223PQE uses UHD Graphics 770, while the Intel Core Ultra 7 266V uses Arc 140V. The Arc 140V is a more recent and capable integrated GPU architecture.

Architecture Differences

The two processors represent fundamentally different design philosophies. The Intel Core 5 223PQE, codenamed Bartlett Lake, is a desktop part on Intel Socket 1700 with a 10 nm Intel process. It uses a conventional core layout with 8 cores and 16 threads via Hyper-Threading, paired with a 125 W TDP. The Intel Core Ultra 7 266V, codenamed Lunar Lake, is a mobile part on Intel BGA 2833, built on TSMC's 3 nm process with a 17 W TDP. It has 8 cores but only 8 threads, indicating a design prioritizing efficiency over raw multi-threading.

Cache hierarchies diverge sharply. The Core 5 223PQE allocates 80 KB L1 and 2 MB L2 per core, plus 24 MB shared L3. The Core Ultra 7 266V allocates 192 KB L1 and 2.5 MB L2 per core, but only 12 MB shared L3. The larger per-core caches on the Lunar Lake part help with single-thread latency, while the Bartlett Lake part's larger L3 benefits shared data access across threads.

Memory support differs by platform. The Core 5 223PQE supports DDR4 and DDR5 with dual-channel 89.6 GB/s bandwidth and ECC memory. The Core Ultra 7 266V supports LPDDR5X (depending on motherboard) with dual-channel 136.5 GB/s bandwidth and no ECC. The mobile part has 52% more memory bandwidth but lacks error correction.

PCIe connectivity is another major split. The Core 5 223PQE provides Gen 5 with 16 lanes (CPU only), while the Core Ultra 7 266V provides Gen 5 with only 4 lanes. The desktop part can drive multiple high-bandwidth peripherals; the mobile part is limited to a single device or low-lane-count configuration.

Integrated graphics differ as well: UHD Graphics 770 on the Core 5 223PQE versus Arc 140V on the Core Ultra 7 266V. The Arc 140V is based on a newer architecture and is positioned for better media and light gaming performance, though the database does not include separate GPU benchmarks.

Head-to-Head Benchmarks

The database includes benchmark scores only for the Intel Core Ultra 7 266V, so direct comparisons rely on the recorded results for that part and the specification differences for the Core 5 223PQE. The Core Ultra 7 266V's Cinebench R23 multi-core score is 16544, and single-core is 2335. Its Cinebench R20 multi-core is 6948 and single-core is 980. In Cinebench R15, multi-core is 1667 and single-core is 235.

The Core Ultra 7 266V's PassMark scores show a distinct pattern. Integer math scores 41558, floating point math 56923, and extended instructions 15928. Data compression scores 187050, while data encryption is 13822. The find prime numbers test scores 191, random string sorting 22905, physics 1608, and multithread 19461. Single-thread PassMark is 3943.

The Core Ultra 7 266V has an average benchmark score of 23297, placing it in the 76th percentile of all CPUs. Its nearest rivals include the AMD Ryzen 7 5800H with an average score of 23277 (0.1% behind), the Intel Core i9-11900F at 23254 (0.2% behind), the Intel Core Ultra 9 288V at 23219 (0.3% behind), and the AMD EPYC 4124P at 23167 (0.6% behind). These deltas are small, indicating the Core Ultra 7 266V sits in a tightly competitive performance band.

Because the Core 5 223PQE has no recorded benchmarks, the head-to-head must be inferred from architecture. The Core 5 223PQE's 16 threads and higher boost clock of 5.50 GHz versus 5.00 GHz suggest it would lead in heavily threaded workloads that scale beyond 8 threads. The Core Ultra 7 266V's larger L1 and L2 caches and higher memory bandwidth (136.5 GB/s versus 89.6 GB/s) favor latency-sensitive single-thread tasks and memory-bound operations.

The Core Ultra 7 266V's 3 nm process and 17 W TDP indicate better energy efficiency per operation, while the Core 5 223PQE's 125 W TDP allows sustained high-clock operation across more threads. The data shows the Core Ultra 7 266V performing competitively against 8-core desktop and mobile parts from the prior generation, as evidenced by its near-identical scores to the Ryzen 7 5800H and Core i9-11900F.

Specification Differences

The two processors differ in nearly every specification field. The Core 5 223PQE has 16 threads versus 8 threads on the Core Ultra 7 266V. Base clocks are 4.00 GHz versus 2.20 GHz, and boost clocks are 5.50 GHz versus 5.00 GHz. TDP is 125 W versus 17 W. Socket types are Intel Socket 1700 versus Intel BGA 2833.

Process nodes are 10 nm (Intel) versus 3 nm (TSMC). Cache configurations differ: L1 is 80 KB per core versus 192 KB per core, L2 is 2 MB per core versus 2.5 MB per core, and L3 is 24 MB shared versus 12 MB shared. Memory support includes DDR4/DDR5 with ECC versus LPDDR5X without ECC. Memory bandwidth is 89.6 GB/s versus 136.5 GB/s.

PCIe lanes are Gen 5 with 16 lanes versus Gen 5 with 4 lanes. Integrated graphics are UHD Graphics 770 versus Arc 140V. Market segments are Desktop versus Mobile. Release dates are 2026-03-08 versus 2024-09-23. The Core 5 223PQE has a launch MSRP of $319. The Core Ultra 7 266V has no launch MSRP recorded in the database. Both parts are active in production, both have locked multipliers, and neither has an unlocked multiplier option.

The Verdict

The data indicates the Intel Core 5 223PQE is designed for desktop workloads that demand high multi-thread throughput and large shared cache, with support for ECC memory and 16 PCIe Gen 5 lanes. Its 16 threads and 5.50 GHz boost clock provide a clear advantage in parallel rendering, compilation, and server-style tasks. The 125 W TDP suggests sustained performance under load, though the database does not include its benchmark scores to quantify the margin.

The Intel Core Ultra 7 266V is positioned for mobile efficiency, with a 17 W TDP, 3 nm process, and higher memory bandwidth. Its 76th percentile ranking and near-identical scores to the Ryzen 7 5800H and Core i9-11900F (0.1% and 0.2% deltas) show it delivers competitive performance in a fraction of the power envelope. The larger per-core L1 and L2 caches and higher bandwidth favor single-thread responsiveness and memory-heavy operations.

For users requiring maximum thread count and ECC support on a desktop platform, the Core 5 223PQE is the appropriate choice based on its specifications. For users prioritizing low power, portability, and a more advanced process node, the Core Ultra 7 266V offers proven benchmark results. The Core 5 223PQE has no recorded benchmarks, so its real-world performance remains unspecified in the database, while the Core Ultra 7 266V has a full set of Cinebench and PassMark scores. Users should weight the Core Ultra 7 266V's verified scores against the Core 5 223PQE's architectural advantages in threads and cache capacity.