Xeon D-1581 vs Core i9-9900T
Xeon D-1581
Core i9-9900T
Performance Spectrum - CPU
About PassMark
PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Xeon D-1581
Performance Per Dollar Core i9-9900T
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon D-1581 | Core i9-9900T |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($400) | ✅ More affordable ($215) |
| Longevity | 🛑 Legacy (Broadwell (2015−2019) / 14 nm) | ✨ Modern (Coffee Lake-R (2018−2019) / 14 nm) |
💎 Value Proposition
| Insight | Xeon D-1581 | Core i9-9900T |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+87%) |
| Upfront Cost | ⚠️ Higher cost ($400) | ✅ More affordable ($215) |
Performance Check
To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.
Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.
Technical Specifications
Side-by-side comparison of Xeon D-1581 and Core i9-9900T
Xeon D-1581
The Xeon D-1581 is manufactured by Intel. It was released in 2015-01-01. It is based on the Broadwell (2015−2019) architecture. It features 16 cores and 32 threads. Base frequency is 1.8 GHz, with boost up to 2.4 GHz. L3 cache: 1.5 MB (per core). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: FCBGA1667. Thermal design power (TDP): 65 Watt. Memory support: DDR4, DDR3. Passmark benchmark score: 13,173 points. Launch price was $800.
Core i9-9900T
The Core i9-9900T is manufactured by Intel. It was released in 23 April 2019 (6 years ago). It is based on the Coffee Lake-R (2018−2019) architecture. It features 8 cores and 16 threads. Base frequency is 2.1 GHz, with boost up to 4.4 GHz. L3 cache: 16 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 35 Watt. Memory support: DDR4. Passmark benchmark score: 13,208 points. Launch price was $439.
Processing Power
The Xeon D-1581 packs 16 cores / 32 threads, while the Core i9-9900T offers 8 cores / 16 threads — the Xeon D-1581 has 8 more cores. Boost clocks reach 2.4 GHz on the Xeon D-1581 versus 4.4 GHz on the Core i9-9900T — a 58.8% clock advantage for the Core i9-9900T (base: 1.8 GHz vs 2.1 GHz). The Xeon D-1581 uses the Broadwell (2015−2019) architecture (14 nm), while the Core i9-9900T uses Coffee Lake-R (2018−2019) (14 nm). In PassMark, the Xeon D-1581 scores 13,173 against the Core i9-9900T's 13,208 — a 0.3% lead for the Core i9-9900T. L3 cache: 1.5 MB (per core) on the Xeon D-1581 vs 16 MB (total) on the Core i9-9900T.
| Feature | Xeon D-1581 | Core i9-9900T |
|---|---|---|
| Cores / Threads | 16 / 32+100% | 8 / 16 |
| Boost Clock | 2.4 GHz | 4.4 GHz+83% |
| Base Clock | 1.8 GHz | 2.1 GHz+17% |
| L3 Cache | 1.5 MB (per core) | 16 MB (total)+967% |
| L2 Cache | 256K (per core) | 256K (per core) |
| Process | 14 nm | 14 nm |
| Architecture | Broadwell (2015−2019) | Coffee Lake-R (2018−2019) |
| PassMark | 13,173 | 13,208 |
Memory & Platform
The Xeon D-1581 uses the FCBGA1667 socket (PCIe 3.0), while the Core i9-9900T uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | Xeon D-1581 | Core i9-9900T |
|---|---|---|
| Socket | FCBGA1667 | LGA1151 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
Value Analysis
The Xeon D-1581 launched at $400 MSRP, while the Core i9-9900T debuted at $423. At current prices ($400 vs $215), the Core i9-9900T is $185 cheaper. In terms of value (PassMark points per dollar), the Xeon D-1581 delivers 32.9 pts/$ vs 61.4 pts/$ for the Core i9-9900T — making the Core i9-9900T the 60.4% better value option.
| Feature | Xeon D-1581 | Core i9-9900T |
|---|---|---|
| MSRP | $400-5% | $423 |
| Avg Price (30d) | $400 | $215-46% |
| Performance per Dollar | 32.9 | 61.4+87% |
| Release Date | 2016 | 2019 |
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