AMD Ryzen 9 7900 vs Intel Core Ultra 9 285T Comparison

The Verdict

The data splits this comparison into two very different use cases. The Intel Core Ultra 9 285T is the single-thread and lightly threaded champion, with a massive 141% lead in Cinebench R23 single-core and a 51.4% advantage in Cinebench R15 single-core. It also dominates in floating-point math with a 40.8% win. If your workload lives in short bursts, single-threaded applications, or FP-heavy number crunching, the 285T is the clear pick.

The AMD Ryzen 9 7900 is the better all-rounder for sustained multi-threaded work. It wins 9 of the 15 head-to-head benchmarks, including Cinebench R15 multi-core by 15.8%, PassMark multi-thread by 17.4%, integer math by 19.3%, and data compression by 33.5%. Its average benchmark score sits at 49228, just behind the Intel's 51310, but the AMD's 90th percentile versus the Intel's 91st percentile shows they occupy nearly the same performance tier overall.

For builders who prioritize single-core responsiveness, the 285T is the answer. For anyone running heavily threaded workloads, compression, or integer-heavy tasks, the 7900 delivers more consistent wins. The 7900 also comes with an unlocked multiplier and a lower launch MSRP of $429, while the 285T is locked and launched at $549.

Architecture Differences

The two chips come from fundamentally different design philosophies. Intel's Core Ultra 9 285T uses Arrow Lake-S architecture on a TSMC 3 nm process, packing 24 cores and 24 threads. It has no hyper-threading, which explains the equal core and thread counts. The design leans on a 35 W TDP to achieve efficiency, with a transistor count of 17,800 million spread across a 243 mm² die.

AMD's Ryzen 9 7900 uses Zen 4 architecture on a TSMC 5 nm process, with 12 cores and 24 threads. That is 12 physical cores with simultaneous multithreading, giving it the same thread count as the Intel but from half the physical cores. The 7900 runs at a 65 W TDP, uses 13,140 million transistors across a dual-die layout of 2x 71 mm², and sits on the AM5 socket with an unlocked multiplier.

Cache layouts differ substantially. The 285T provides 192 KB of L1 per core, 3 MB of L2 per core, and 36 MB of shared L3. The 7900 offers 64 KB L1 per core, 1 MB L2 per core, and a larger 64 MB shared L3. The AMD's larger L3 pool helps in cache-sensitive workloads, while Intel's larger per-core L1 and L2 benefit latency-sensitive single-thread tasks.

Both support DDR5 memory, but Intel lists a higher memory bandwidth figure at 102.4 GB/s against AMD's 83.2 GB/s. Both support ECC memory. PCIe generations differ as well: Intel offers Gen 5 with 20 lanes on the CPU, while AMD provides Gen 5 with 24 lanes. Integrated graphics also differ: Intel uses Arc Xe-LPG Graphics with 64 execution units, while AMD includes Radeon Graphics.

The Intel part runs on Socket 1851, released on 2025-01-06, with part number SRQD3. The AMD ships on Socket AM5, released 2023-01-13, with part number 100-000000590. Both are active production desktop parts.

Head-to-Head Benchmarks

The head-to-head results reveal a clear pattern. Intel wins where clocks and per-core efficiency matter. Cinebench R23 single-core shows the 285T at 4739 versus the 7900's 1966, a 141% advantage that is the largest gap in the entire comparison. Cinebench R15 single-core also goes Intel's way at 477 versus 315, a 51.4% margin. PassMark single-thread shows 4576 against 4130, a 10.8% lead. Floating-point math is another Intel stronghold at 137923 versus 97943, a 40.8% win.

AMD takes the multi-threaded and data-heavy tests. Cinebench R15 multi-core goes to the 7900 at 4020 against 3384, a 15.8% margin. PassMark multi-thread shows 48347 versus 39931, a 17.4% win. Integer math favors AMD at 164075 versus 132433, a 19.3% edge. Data compression is the biggest AMD win at 577847 versus 384140, a 33.5% gap. Random string sorting goes AMD's way by 30.3%, extended instructions by 35%, and data encryption by 7.6%. Find prime numbers and physics also favor AMD, by 9.2% and 7.1% respectively.

Interestingly, Cinebench R23 multi-core goes to Intel at 33573 versus 24776, a 35.5% win. This shows the 285T is not simply a single-thread specialist; in some modern multi-threaded rendering workloads, it outperforms the 7900 despite the AMD's wins in older Cinebench R15 multi-core and PassMark multi-thread. The Intel also shows a 10.8% single-thread PassMark win, confirming its per-core strength.

The overall average benchmark scores are close: 51310 for the Intel versus 49228 for the AMD. The Intel's nearest rival is the Intel Core i9-14900T at 51015 with a 0.6% delta, while the AMD's nearest rival is the AMD Ryzen 7 PRO 5755G at 49196 with a 0.1% delta. Both chips sit within a narrow band of their closest competitors.

FAQ

Q: Which CPU has better single-core performance?

A: The Intel Core Ultra 9 285T wins every single-thread benchmark in the head-to-head. Cinebench R23 single-core shows a 141% lead (4739 vs 1966), Cinebench R15 single-core shows a 51.4% lead (477 vs 315), and PassMark single-thread shows a 10.8% lead (4576 vs 4130).

Q: Which CPU is better for multi-threaded workloads?

A: It depends on the benchmark. The AMD Ryzen 9 7900 wins PassMark multi-thread by 17.4% (48347 vs 39931) and Cinebench R15 multi-core by 15.8% (4020 vs 3384). However, the Intel Core Ultra 9 285T wins Cinebench R23 multi-core by 35.5% (33573 vs 24776).

Q: How do their core and thread counts compare?

A: The Intel has 24 cores and 24 threads with no hyper-threading. The AMD has 12 cores and 24 threads using simultaneous multithreading. Both deliver 24 threads total.

Q: What are the TDP differences?

A: The Intel Core Ultra 9 285T runs at 35 W TDP, while the AMD Ryzen 9 7900 runs at 65 W TDP. The Intel's lower TDP comes from its 3 nm process node and efficient Arrow Lake design.

Q: Which CPU has more L3 cache?

A: The AMD Ryzen 9 7900 has 64 MB of shared L3 cache. The Intel Core Ultra 9 285T has 36 MB of shared L3. However, the Intel has larger per-core L1 (192 KB) and L2 (3 MB) compared to the AMD's 64 KB L1 and 1 MB L2.

Q: Are both CPUs overclockable?

A: No. The AMD Ryzen 9 7900 has an unlocked multiplier, making it overclockable. The Intel Core Ultra 9 285T does not have an unlocked multiplier.

Where Each One Wins

The Intel Core Ultra 9 285T wins in scenarios that favor per-core performance and floating-point throughput. Cinebench R23 multi-core also goes to Intel, suggesting that modern rendering workloads that scale well with the 24-core design can favor the 285T. The 35 W TDP makes it an efficiency-oriented choice for compact builds that still need strong single-thread performance. Its 91st percentile ranking and 51310 average score edge out the AMD's 90th percentile and 49228 average.

The AMD Ryzen 9 7900 wins in data-heavy and integer-heavy workloads. Data compression, encryption, extended instructions, random string sorting, and integer math all go to AMD by margins ranging from 7.6% to 35%. The 7900's 64 MB L3 cache and 24 threads from 12 cores clearly serve these workloads well. Its unlocked multiplier offers flexibility for overclocking, and its 24 PCIe Gen 5 lanes provide more CPU-connected expansion capacity than Intel's 20 lanes.

For a media encoding or productivity PC, the choice depends on the specific encoder or application. PassMark multi-thread and Cinebench R15 multi-core favor AMD, but Cinebench R23 multi-core favors Intel. The 285T is the pick for single-thread responsiveness and FP math. The 7900 is the pick for compression, encryption, and integer processing. Both processors hold nearly identical percentile rankings, so neither is a clear overall winner; the workload determines the better buy.

Specification Differences

| Specification | Intel Core Ultra 9 285T | AMD Ryzen 9 7900 |

|---|---|---|

| Series | Core Ultra Series 2 | 7000 series |

| Manufacturer | Intel | AMD |

| Cores | 24 | 12 |

| Threads | 24 | 24 |

| Base clock | 1.40 GHz | 3.70 GHz |

| Boost clock | 5.40 GHz | 5.40 GHz |

| TDP | 35 W | 65 W |

| Socket | Intel Socket 1851 | AMD Socket AM5 |

| Architecture | Arrow Lake | Zen 4 |

| Codename | Arrow Lake-S | Raphael |

| Process node | 3 nm | 5 nm |

| Foundry | TSMC | TSMC |

| Transistors | 17,800 million | 13,140 million |

| Die size | 243 mm² | 2x 71 mm² |

| L1 cache | 192 KB (per core) | 64 KB (per core) |

| L2 cache | 3 MB (per core) | 1 MB (per core) |

| L3 cache | 36 MB (shared) | 64 MB (shared) |

| Memory support | DDR5 | DDR5 |

| Memory bus | Dual-channel | Dual-channel |

| Memory bandwidth | 102.4 GB/s | 83.2 GB/s |

| ECC memory | Yes | Yes |

| PCIe | Gen 5, 20 lanes (CPU only) | Gen 5, 24 lanes (CPU only) |

| Integrated graphics | Arc Xe-LPG Graphics 64EU | Radeon Graphics |

| Multiplier unlocked | No | Yes |

| Release date | 2025-01-06 | 2023-01-13 |

| Launch MSRP | $549 | $429 |

| Part number | SRQD3 | 100-000000590 |