The 8 -bay Synology DS1821+ is for IT enthusiasts and SMB customers looking for powerful, expandable storage solutions.Corporate backup solutions can safely protect users from potential data loss and make significant improvements to computing functions and throughput. ● CPU AMD RYZEN Quad Core 2.2 GHz ● Cash acceleration Dual M.2 2280 Slot for NVME Cash ● performance 113K 4K 4K Random Read IOPS1 ● Scalability Extending up to 18 drives with two DX517 extensions- CPU model AMD RYZEN V1500B CPU architecture 64-bit CPU frequency 4-Core 2.2 GHz Hardware encryption engine (AES-NI) Installed System Memory 4 GB DDR4 ECC SODIMM Pre -installed memory module 4 GB (4 GB x 1) Number of memory slots 2 Maximum memory capacity 32 GB (16 GB x 2) * For the best compatibility and reliability, select the Synology Memory Module.If the memory is expanded using a memory other than Synology, Synology will not provide product guarantee or technical support . * Synology has the right to replace it with a higher frequency memory module depending on the supplier product life cycle.Please be assured that the same benchmark will be strictly inspected by the same benchmark so that the performance is not born. Drive Bay 8 Maximum number of bays when using an expansion unit 18 (DX517 X 2) M.2 drive slot 2 (NVME) Compatible drive type ・ 3.5 "SATA HDD ・ 2.5 "SATA HDD ・ 2.5 ”SATA SSD ・ M.2 2280 NVME SSD * "Compatible drive type" is a driving test that is compatible with Synology products.This term does not indicate the maximum connection speed of each drive bay . Maximum single volume size 108 TB * Each internal volume (with multiple drive configurations) can be expanded to up to 108 tb. Hot swapable drive Response RJ-45 1GBE LAN Port 4 (Link Agregation / Failover) < / Td> USB 3.0 port 4 ESATA port 2 PCIe extension 1 X GEN3 X8 SLOT (X4 LINK) File System Internal drive Btrfs, EXT4 External drive BTRFS, EXT4, EXT3, FAT, NTFS, HFS+, EXFAT* * EXFAT Access can be purchased separately at the package center. outer dimensions (height x width x depth) 166 mm x 343 mm x 243 mm Weight 6 kg System fan 120 mm x 120 mm x 2 PCS fan speed mode ・ Maximum speed mode ・ Cooling mode ・ Low noise mode Easy replacement system fan Response Front LED indicator for adjusting brightness Response power recovery Response noise level 22.2 db (a) * Fully equipped with a noise -level test environment Seagate 2TB ST2000VN000 Hard drive in idol state.G.R.A.S. 2 Type 40AE Mike, installed 1 meter away from Synology Nas, respectively.Background noise 16.49-17.51 DB (a), temperature 24.25-25.75? C; Humidity 58.2-61.8% Book the power supply on/off Response Wake on LAN / WAN < / TH> Response Power unit / adapter < / TH> 250 W AC input power supply voltage 100 V to 240 V AC Power frequency 50/60 Hz, single -phase Power consumption ・ 59.8 W (access) ・ 26.18 W (HDD high -bunation) * Power consumption is measured with the data full loaded on the Western Digital 1TB WD10EFRX hard drive. English heat ・ 204.05 Btu/HR (access) ・ 89.33 Btu/HR (HDD high -bunation) Operation temperature 0 ° C ~ 40 ° C (32 ° F to 104 ° f) storage temperature -20 ° C to 60 ° C (-5 ° f to 140 ° f) Relative Humidity 5% -95% RH Certification Organization FCC, CE, BSMI, EAC, CCC, KC, VCCI, RCM Guarantee 5 years (3 years hardware warranty + 2 years extended warranty (EW201)) ROHS compliant Package content ・ 1 body ・ 1 accessory pack ・ 1 AC power cord ・ RJ-45 2 LAN cables ・ 1 quick installation guide Optional accessories ・ DDR4 ECC SODIMM D4ES01-4G/D4ES01-8G/D4ECSO-2666-16G ・ Extended unit DX517 ・ 2.5 "SATA SSD SAT5200 ・ M.2 2280 NVME SSD SNV3400 ・ 10GBE Network Interface Card E10G18-T2/E10G18-T1/E10G17-F2 ・ VisualStation VS960HD/VS360HD ・ Surveillance Device License Pack