Intel Core 3 305 vs Intel Core Ultra 9 285T Comparison

Head-to-Head Benchmarks

The benchmark data records a complete sweep for the Intel Core Ultra 9 285T across all 17 head-to-head comparisons, with the Intel Core 3 305 winning none. The most substantial gaps appear in compute-heavy workloads. In Cinebench R23 multi-core, the Core Ultra 9 285T scores 33,573 against the Core 3 305's 13,123, a 60.9% advantage. The single-core R23 result shows a similar pattern: 4,739 versus 1,852, also a 60.9% delta. These percentage deltas repeat almost exactly across Cinebench R15 and R20, with the multi-core tests all showing a 60.9% difference and the single-core tests showing a 61.0% difference. The consistency indicates the performance gap scales uniformly with clock frequency and core count rather than varying by workload intensity within the Cinebench suite.

PassMark results reveal where the Core Ultra 9 285T stretches its lead furthest. Integer math shows a 75.6% advantage (132,433 versus 32,295), the largest delta in the entire dataset. Floating-point math follows at 69.3% (137,923 versus 42,284). Prime number finding records a 66.7% gap (345 versus 115), and data encryption shows 65.6% (32,061 versus 11,019). These are the workloads where the 24-core part's parallel throughput dominates the 6-core part. The smallest relative gap appears in single-threaded PassMark tests, where the Core Ultra 9 285T leads by 13.1% (4,576 versus 3,977). That narrower margin reflects the boost clock difference: 5.40 GHz versus 4.30 GHz, but the single-core Cinebench results show a much larger 61.0% delta, suggesting architectural efficiency differences amplify beyond raw clock speed.

Data compression shows a 61.8% gap (384,140 versus 146,857), while random string sorting trails at 63.1% (47,695 versus 17,623). Extended instructions record a 50.7% advantage (27,477 versus 13,543), the smallest multi-core delta in the PassMark set. Physics simulation shows a 56.6% gap (2,842 versus 1,233), and the overall multithread score lands at 61.3% (39,931 versus 15,439). The average benchmark score reinforces the hierarchy: the Core Ultra 9 285T averages 51,310 across all benchmarks, while the Core 3 305 averages 18,302. That places the Core Ultra 9 285T in the 91st percentile of all CPUs in the database, versus the 72nd percentile for the Core 3 305.

Where Each One Wins

The Core Ultra 9 285T wins every recorded benchmark category, so the use-case split comes down to the magnitude of the advantage and the workload type. For integer-heavy parallel tasks, such as encryption or prime number searches, the Core Ultra 9 285T delivers its largest margins, exceeding 65% in both. These workloads scale directly with core count and memory bandwidth, and the data shows the 24-core part leveraging its full resource pool. The Core 3 305 remains functional but operates at roughly one-third to one-quarter the throughput in these categories.

For single-threaded responsiveness, the gap narrows considerably. The PassMark single-thread score sits at 4,576 versus 3,977, a 13.1% difference. This suggests that in lightly threaded applications, such as typical office tasks or web browsing, the Core 3 305's 4.30 GHz boost clock keeps it competitive despite the architectural gap. However, the Cinebench R23 single-core score tells a different story: 4,739 versus 1,852, a 61.0% deficit. The discrepancy between PassMark single-thread and Cinebench single-core indicates that the Core 3 305's Wildcat Lake cores handle certain instruction patterns better than others, but the Arrow Lake cores in the Core Ultra 9 285T maintain a decisive edge in rendering-style single-threaded workloads.

Data compression and random string sorting favor the Core Ultra 9 285T by roughly 62% to 63%, which places them in the mid-range of the performance gap. These tasks benefit from the larger 36 MB shared L3 cache and dual-channel memory bus, but not to the same extent as pure integer math. Extended instructions show the smallest multi-core gap at 50.7%, indicating that the Core 3 305's Xe3 graphics or core microarchitecture handles some vector operations more efficiently relative to its smaller core count. The physics simulation test sits at 56.6%, reflecting moderate scaling with thread count.

For workloads that fit entirely in the Core 3 305's 6 MB shared L3 cache, the single-threaded PassMark result of 3,977 suggests acceptable performance. But any task that spills beyond that cache or requires sustained multi-threaded execution will see the Core Ultra 9 285T pull ahead by 60% or more. The mobile segment designation for the Core 3 305 implies a focus on power-constrained environments, while the desktop segment for the Core Ultra 9 285T indicates a design for unrestricted performance. The 15 W TDP versus 35 W TDP reinforces that split, but the benchmark data shows no workload where the lower-power part wins outright.

Architecture Differences

The two processors come from different architectural lineages. The Core 3 305 uses Wildcat Lake codename, a 3 nm process built at Intel's own foundry. The Core Ultra 9 285T uses Arrow Lake-S, also on a 3 nm process but fabricated by TSMC. Both parts share the 3 nm node, but the transistor counts diverge sharply. The Core Ultra 9 285T contains 17,800 million transistors on a 243 mm² die, while the Core 3 305's transistor count and die size are not recorded in the database. The Core Ultra 9 285T's larger physical footprint accommodates 24 cores versus 6 cores, and 24 threads versus 6 threads.

Cache hierarchies differ structurally. The Core 3 305 provides 192 KB of L1 cache, 2.5 MB of L2, and 6 MB of shared L3. The Core Ultra 9 285T provides 192 KB of L1 per core, 3 MB of L2 per core, and 36 MB of shared L3. The per-core L2 allocation on the Core Ultra 9 285T scales with its 24 cores, yielding a total L2 capacity far exceeding the Core 3 305's fixed 2.5 MB. The shared L3 difference, 36 MB versus 6 MB, directly impacts workloads that cycle through large datasets, such as the data compression tests where the Core Ultra 9 285T leads by 61.8%.

Memory support also separates the two. The Core 3 305 supports DDR5 and LPDDR5X over a single-channel bus, delivering 59.7 GB/s of bandwidth. The Core Ultra 9 285T supports DDR5 over a dual-channel bus, delivering 102.4 GB/s. The bandwidth difference of roughly 71.5% (102.4 versus 59.7) correlates with the multi-core benchmark gaps, though the integer math delta of 75.6% exceeds the bandwidth delta, indicating additional architectural factors. ECC memory is available on the Core Ultra 9 285T but not on the Core 3 305, a feature relevant for data integrity in server-like workloads.

PCIe connectivity differs by generation and lane count. The Core 3 305 provides Gen 4 with 6 lanes (CPU only), while the Core Ultra 9 285T provides Gen 5 with 20 lanes (CPU only). The newer Gen 5 standard and higher lane count give the Core Ultra 9 285T more headroom for discrete GPUs or NVMe storage, but the benchmark data does not isolate PCIe performance. Integrated graphics also diverge: the Core 3 305 uses Intel Xe3 Graphics with 1 Xe core, while the Core Ultra 9 285T uses Arc Xe-LPG Graphics with 64 execution units. The database does not include graphics benchmarks, so the comparison remains limited to CPU workloads.

Sockets and form factors differ completely. The Core 3 305 uses Intel BGA 1516, a soldered mobile socket, while the Core Ultra 9 285T uses Intel Socket 1851, a desktop LGA socket. The Core 3 305's multiplier is locked, and so is the Core Ultra 9 285T's, meaning neither part supports user overclocking. The release dates sit roughly 15 months apart, with the Core Ultra 9 285T launching on 2025-01-06 and the Core 3 305 on 2026-04-15. The launch MSRP for the Core 3 305 is $309, and for the Core Ultra 9 285T it is $549.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core Ultra 9 285T has 24 cores and 24 threads. The Intel Core 3 305 has 6 cores and 6 threads.

Q: How much faster is the Core Ultra 9 285T in multi-core rendering?

A: In Cinebench R23 multi-core, the Core Ultra 9 285T scores 33,573 versus 13,123 for the Core 3 305, a 60.9% advantage. The R20 and R15 multi-core tests show the same 60.9% delta.

Q: What is the single-threaded performance gap?

A: The PassMark single-thread score shows 4,576 for the Core Ultra 9 285T versus 3,977 for the Core 3 305, a 13.1% difference. The Cinebench R23 single-core score shows 4,739 versus 1,852, a 61.0% gap.

Q: Do both processors use the same manufacturing process?

A: Both use a 3 nm process, but the Core 3 305 is fabricated by Intel while the Core Ultra 9 285T is fabricated by TSMC. The Core Ultra 9 285T has 17,800 million transistors on a 243 mm² die.

Q: Which processor supports ECC memory?

A: Only the Intel Core Ultra 9 285T supports ECC memory. The Intel Core 3 305 does not include ECC support.

Q: How do the memory bandwidth figures compare?

A: The Core Ultra 9 285T delivers 102.4 GB/s over a dual-channel DDR5 bus. The Core 3 305 delivers 59.7 GB/s over a single-channel bus supporting DDR5 and LPDDR5X.

The Verdict

The recorded data leaves no ambiguity: the Intel Core Ultra 9 285T outperforms the Intel Core 3 305 in every single benchmark category, with 17 wins to 0. The average benchmark score of 51,310 versus 18,302 places the Core Ultra 9 285T in the 91st percentile of all CPUs, while the Core 3 305 sits in the 72nd percentile. The nearest rivals for the Core Ultra 9 285T include the Intel Core i9-14900T at a 0.6% higher average score, the Intel Core i9-13900F at 0.8% lower, the Intel Core i7-13850HX at 1.1% higher, and the AMD Ryzen 9 5900XT at 1.2% higher. The Core 3 305's nearest rivals are the Intel Core i3-14100 at 0.1% higher, the Intel Core 5 330 at 0.2% higher, the Intel Core 7 360 at 0.4% higher, and the AMD Ryzen 5 2600E at 0.4% lower.

The Core Ultra 9 285T targets workloads that demand maximum parallel throughput: integer math, encryption, compression, and multi-threaded rendering. Its 24 cores, 36 MB of shared L3 cache, and 102.4 GB/s dual-channel bandwidth deliver deltas between 50.7% and 75.6% over the Core 3 305 in these categories. The Core 3 305, with its 6 cores, 6 MB L3, and 59.7 GB/s single-channel bandwidth, remains viable for single-threaded tasks where the gap narrows to 13.1% in PassMark, but the Cinebench single-core results show a much larger 61.0% deficit, indicating the Core 3 305's Wildcat Lake architecture falls behind in rendering-style single-threaded work.

The choice depends on the workload profile. For sustained multi-core processing, the Core Ultra 9 285T is the clear data-driven selection, matching or exceeding the performance of its nearest rivals like the Core i9-14900T and Core i9-13900F. For power-constrained mobile environments with light single-threaded duties, the Core 3 305 offers a functional baseline, but the database shows no benchmark where it leads. The launch MSRP of $549 for the Core Ultra 9 285T and $309 for the Core 3 305 reflects the performance tier, but the benchmark data alone justifies the Core Ultra 9 285T for any workload that can use more than six threads. The 15 W TDP of the Core 3 305 versus the 35 W TDP of the Core Ultra 9 285T indicates the former fits thermally limited chassis, but the performance cost is substantial across every measured category.