Синькуань Сервер | Поставщик оборудования для корпоративных серверов
If You Are Still Running PCIe 4.0 SSDs in Your Gen5 Servers, You Are Leaving Half the Slot Bandwidth on the Table
The Dell R770, 670 рэндов, xFusion 2288H V7, and 5885H V7 all ship with PCIe 5.0 backplanes. But the SSDs most IT teams install in them are Gen4 — because Gen5 drives are newer, pricier, and harder to source. The Kioxia CM7 7.68TB changes that equation. It is a native PCIe 5.0 x4 enterprise NVMe SSD that doubles the throughput ceiling of Gen4 drives (14 GB/s read vs 7 ГБ/с) while fitting in the same U.2 slot and drawing comparable power.
Six Questions About Gen5 SSD Migration
1. Do I actually need Gen5 throughput for my workload? For most databases and virtualization: no. A Gen4 drive already saturates most application I/O at 1M IOPS random read. Gen5 matters for two specific scenarios: (а) AI/ML data pipelines where storage throughput limits GPU utilization during training data loading, и (б) all-flash storage clusters where the aggregate throughput of 20+ NVMe drives saturates the PCIe switch fabric. If neither describes your workload, Gen4 is still the pragmatic choice.
2. Will a Gen5 SSD work in a Gen4 backplane? Yes — PCIe is backward-compatible. The CM7 negotiates down to Gen4 x4 and delivers Gen4-level performance (~7 GB/s). You can deploy CM7 in Gen4 servers today and get the Gen5 throughput when you refresh to Gen5 backplanes. No forklift migration required.
3. What is the real-world latency difference? The CM7 delivers ~60 microseconds read latency (4K random, QD1) — roughly 10-15% lower than comparable Gen4 drives. For OLTP databases and AI inference where tail latency matters, that 10% improvement at the 99.9th percentile is worth more than the headline throughput numbers.
4. How does endurance compare to Gen4? The CM7 is rated at 1 DWPD — same as the Samsung PM9A3 (Gen4) and most mainstream enterprise SSDs. Gen5 does not inherently improve NAND endurance. If your workload exceeds 1 DWPD sustained writes, look at 3 DWPD drives regardless of PCIe generation.
5. What RAID/HBA controller do I need for Gen5 NVMe? For hardware RAID: МИНУТА H965i (16-port Gen5 tri-mode) or equivalent xFusion RAID controller. For software-defined storage (vSAN, Ceph): any Gen5-capable HBA or onboard NVMe ports. Gen5 NVMe drives connect via the same U.2 (SFF-8639) connector as Gen4 — the controller is the variable, not the cable.
6. Is the price premium over Gen4 worth it? In mid-2026, Gen5 SSDs carry roughly a 20-30% price premium over comparable Gen4 SSDs at the same capacity. The premium is narrowing by roughly 5-8% per quarter. If your server refresh is in 2026, buying Gen5 SSDs today means you skip the Gen4-to-Gen5 migration in 2028. If your refresh is imminent and the premium fits your budget, buy Gen5 now and amortize the difference across the next 5 годы.
Технические характеристики
| Параметр | Спецификация |
|---|---|
| Емкость | 7.68ТБ (also: 1.6ТБ, 3.2ТБ, 6.4ТБ, 15.36ТБ) |
| Фактор формы | 2.5-inch U.2 (15мм) |
| Интерфейс | PCIe 5.0 х4, NVMe 2.0 |
| Тип NAND | Kioxia BiCS FLASH 3D TLC (162-layer) |
| Последовательное чтение | Вплоть до 14,000 МБ/с |
| Последовательная запись | Вплоть до 7,000 МБ/с |
| Случайное чтение (4K) | Up to 2,700K IOPS |
| Случайная запись (4K) | Up to 600K IOPS |
| Read Latency (4K, QD1) | ~60 microseconds |
| Выносливость | 1 ДВПД (5 годы), 14,016 TBW |
| Среднее время безотказной работы | 2,500,000 часы |
| Власть (Idle / Active) | 5Вт / 21Вт |
| Защита от потери мощности | Capacitor-backed PLP, end-to-end data protection |
| Безопасность | TCG Opal 2.0, СЭД, ФИПС 140-2 (SKU-dependent) |
| Physical Dimensions | 100.45 Икс 69.85 Икс 15.00 мм, 130г |
| Operating Temp | 0от °С до 70 °С |
| Гарантия | 5-year limited (manufacturer) |
Compatible Platforms
Compatible with all Dell PowerEdge servers with U.2 NVMe backplanes, xFusion FusionServer V7, Lenovo ThinkSystem V3/V4. Gen5 performance requires Gen5-capable backplane (670 рэндов, 770 рэндов, R7715, 2288Х V7, 5885Х V7). Gen4 backward-compatible on all other NVMe-capable platforms.
Source Through Xincuan
We stock Kioxia CM7 SSDs across the full capacity range with factory-direct pricing, 3-год гарантии, and global shipping. Volume pricing available for 10+ диски.
