TerabyteWise
Updated · Specifications verified October 12, 2026

Upgrade the Memory in the TerraMaster F2-425 and F4-425

4GB fitted, one slot, 16GB limit, DDR4 non-ECC SO-DIMM

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Quick answer

The F2-425 and F4-425 take DDR4 non-ECC SO-DIMM memory in one slot, to a limit of 16GB. Both ship with 4GB fitted. With one slot, any upgrade replaces the fitted module: one 16GB module reaches the limit.

As of October 12, 2026
Memory limit
16GB
In-stock listings in the tables on this page
111
Prices updated
3 hours ago

Memory facts for the F2-425 and F4-425

F2-425F4-425
Fitted4 GB DDR4 non-ECC SODIMM (1 x 4GB)4 GB DDR4 non-ECC SODIMM (1 x 4GB)
Slots11
Limit16GB DDR4 non-ECC SODIMM16GB DDR4 non-ECC SODIMM
Module typeDDR4 non-ECC SO-DIMMDDR4 non-ECC SO-DIMM
Largest module16GB16GB
ProcessorIntel Celeron N5095, quad core 2.0 GHz (burst to 2.9 GHz)Intel Celeron N5095, quad core 2.0 GHz (burst to 2.9 GHz)

Every configuration the F2-425 and F4-425 allow

ConfigurationTotalWhat to buy
One 8GB module8GBOne 8GB module; the fitted module comes out
One 16GB module16GB (the limit)One 16GB module; the fitted module comes out

TerraMaster's memory rules for the F2-425 and F4-425

One DDR4 non-ECC SO-DIMM slot; TerraMaster's specification names no module.

TerraMaster specifies non-ECC memory for the F2-425 and F4-425. An ECC module is not what the specification calls for.

Where the F2-425 and F4-425 figures come from

Fitted memory, slot count, limit and module rules. TerraMaster's F2-425 and F4-425 pages, October 12, 2026.

Checked on October 12, 2026. Sources: TerraMaster F2-425 specifications; TerraMaster F4-425 specifications; TerraMaster 425 series comparison table.

Go deeper

Only F2-425 and F4-425 memory is on this page.

What else fits the F2-425 · What else fits the F4-425

DDR4 non-ECC SO-DIMM modules up to 16GB, by price

Modules of the type and size the F2-425 and F4-425 take, no larger than 16GB each. A type and size filter: not a list of modules TerraMaster has tested.

Price per
111 products
ProductCapacityPrice$ / TBTypePrimeBuy
SK Hynix 4GB DDR4 2666MHz SODIMM Memory Module4 GB$31.33-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
Samsung 4GB DDR4 PC4-21300, 2666MHZ, 260 PIN SODIMM, 1.2V, CL 19 Laptop ram Memory Module4 GB$34.57-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
OWC 4GB Memory RAM Compatible with Synology DiskStation DS425+4 GB$34.99-DDR4 SO-DIMMNon-ECC-Buy on Amazon
OWC 4GB Memory RAM Replacement for QNAP RAM-4GDR4A0-SO-26664 GB$34.99-DDR4 SO-DIMMNon-ECC-Buy on Amazon
OWC 4GB Memory RAM Replacement for Synology D4NESO-2666-4G D4NS01-4G4 GB$34.99-DDR4 SO-DIMMNon-ECC-Buy on Amazon
OWC 4GB Memory RAM Compat with Synology DiskStation DS220+ DS224+ DS420+4 GB$34.99-DDR4 SO-DIMMNon-ECC-Buy on Amazon
A-Tech DDR4 RAM 4GB 3200MHz PC4-25600 SODIMM Laptop Memory4 GB$38.05-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
A-Tech DDR4 RAM 4GB 2666MHz PC4-21300 SODIMM Laptop Memory4 GB$38.59-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
4GB DDR4-2666 Non-ECC SODIMM Compatible with Synology DiskStation DS425+4 GB$38.99-DDR4 SO-DIMMNon-ECC-Buy on Amazon
Crucial 4GB DDR4 SDRAM Memory Module - 4 GB - DDR4 SDRAM - 2666 MHz DDR4-2666/PC4-21300 - 1.20 V - Non-ECC - Unbuffered - 260-Pin - SODIMM, 4GB Single Rank4 GB$47.39-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
Crucial 8GB, 260-pin SODIMM, DDR4 PC4-19200,8 GB$50.00-DDR4 SO-DIMMNon-ECC-Buy on Amazon
Timetec 8GB DDR4 SODIMM for Intel NUC KIT/Mini PC/HTPC/NUC Board 2133MHz PC4-17000 Non-ECC Unbuffered 1.2V CL15 1Rx8 Single Rank 260 Pin Computer Memory Ram Module Upgrade(8GB)8 GB$53.99-DDR4 SO-DIMM 2133MHzNon-ECC-Buy on Amazon
DATO 8GB RAM DDR4 3200MHz PC4-25600 CL22 SODIMM 1.2V 260-Pin Non-ECC SODIMM Laptop Notebook Memory Module8 GB$53.99-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
A-Tech 8GB DDR4 2133 MHz SODIMM PC4-17000 (PC4-2133P) CL15 Non-ECC Laptop RAM Memory Module8 GB$54.36-DDR4 SO-DIMM 2133MHzNon-ECC-Buy on Amazon
Timetec 8GB DDR4 2400MHz (PC4-2400T) PC4-19200 SODIMM Laptop RAM – 260-Pin 1.2V CL17 Non-ECC Unbuffered Memory Module for Laptop, Notebook, Mini PC, All-in-One8 GB$54.99-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
Timetec 8GB DDR4 2666MHz (PC4-2666V) PC4-21300 SODIMM Laptop RAM – 260-Pin 1.2V CL19 Non-ECC Unbuffered Memory Module for Laptop, Notebook, Mini PC, All-in-One8 GB$54.99-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
Timetec Premium 8GB DDR4 2400MHz (PC4-2400T) PC4-19200 SODIMM Laptop RAM – 260-Pin 1.2V CL17 Non-ECC Unbuffered Memory Module for Laptop, Notebook, Mini PC, All-in-One8 GB$54.99-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
Timetec Premium 8GB DDR4 2666MHz (PC4-2666V) PC4-21300 SODIMM Laptop RAM – 260-Pin 1.2V CL19 Non-ECC Unbuffered Memory Module for Laptop, Notebook, Mini PC, All-in-One8 GB$54.99-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
SK HYNIX 8GB 1RX8 DDR4 SO-DIMM PC4-21300 2666MHZ Memory Module HMA81GS6JJR8N-VK8 GB$55.14-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
OWC 8GB Memory RAM Compat with Synology DiskStation DS220+ DS420+ DS423+8 GB$55.99-DDR4 SO-DIMMNon-ECC-Buy on Amazon
OWC 8GB Memory RAM Replacement for QNAP RAM-8GDR4T0-SO-26668 GB$55.99-DDR4 SO-DIMMNon-ECC-Buy on Amazon
OWC 8GB DDR4 3200MHz Non-ECC SODIMM 260-pin Memory RAM8 GB$55.99-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
OWC 8GB Memory RAM Compatible with ASUSTOR AS5402T AS5404T AS6702T AS6704T8 GB$55.99-DDR4 SO-DIMMNon-ECC-Buy on Amazon
A-Tech 8GB DDR4 2400 MHz SODIMM PC4-19200 (PC4-2400T) CL17 Non-ECC Laptop RAM Memory Module8 GB$56.20-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
NEMIX RAM 8GB (1X8GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN Non-ECC SODIMM Compatible with QNAP RAM 8GDR4K0-SO-2666 NAS Memory8 GB$56.99-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
KLEVV DDR4 8GB (1x8GB) 3200MHz CL22 1.2V SODIMM Laptop Ram Memory SK Hynix Chip (KD48GS880-32N220A)8 GB$56.99-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
SK Hynix 8GB SODIMM DDR4 3200 PC4 1Rx16 HMAA1GS6CJR6N-XN SO-DIMM Laptop RAM Memory for Dell HP Lenovo and Other Systems8 GB$57.87-DDR4 SO-DIMMNon-ECC-Buy on Amazon
Hynix HMA81GS6AFR8N-UH 8GB DDR4 2400MHz Memory Sodimm Module8 GB$57.97-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
Timetec 8GB DDR4 3200MHz (PC4-3200AA) PC4-25600 SODIMM Laptop RAM – 260-Pin 1.2V CL22 Non-ECC Unbuffered Memory Module for Laptop, Notebook, Mini PC, All-in-One8 GB$57.99-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
Timetec Premium 8GB DDR4 3200MHz (PC4-3200AA) PC4-25600 SODIMM Laptop RAM – 260-Pin 1.2V CL22 Non-ECC Unbuffered Memory Module for Laptop, Notebook, Mini PC, All-in-One8 GB$57.99-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
Samsung M471A1K43CB1-CTD 8GB DDR4 PC4-21300, 2666MHZ, 260 PIN SODIMM, 1.2V, CL 19 laptop ram memory module8 GB$58.00-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
A-Tech DDR4 RAM 8GB 2666MHz PC4-21300 SODIMM Laptop Memory8 GB$58.69-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
8GB DDR4-3200 Non-ECC SODIMM Compatible with QNAP TS-2648 GB$58.88-DDR4 SO-DIMMNon-ECC-Buy on Amazon
8GB DDR4-3200 Non-ECC SODIMM Compatible with UGREEN NASync DXP2800 GT8 GB$58.88-DDR4 SO-DIMMNon-ECC-Buy on Amazon
8GB DDR4-3200 Non-ECC SODIMM Compatible with UGREEN NASync DXP4800 GT8 GB$58.88-DDR4 SO-DIMMNon-ECC-Buy on Amazon
SAMSUNG M471A1K43CB1-CTD 2666MHz Memory Modules (8GB, 1 x 8GB, DDR4, 2666 MHz, 260-Pin SO-DIMM, Black, Green)8 GB$58.97-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
Silicon Power DDR4 8GB 3200MHz (PC4-25600) CL22 SODIMM 260-Pin 1.2V Non-ECC Laptop RAM Notebook Computer Memory SU008GBSFU320B02EC8 GB$58.97-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
AiteFeir 8GB DDR4 3200MHz Laptop RAM, PC4-25600 1.2V Low Voltage SODIMM Memory Module, Compatible with Notebooks, Laptops, and All-in-Ones (260-Pin)8 GB$58.99-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
Silicon Power DDR4 8GB 3200MHz (PC4-25600) CL22 SODIMM 260-Pin 1.2V Non-ECC Laptop RAM Notebook Computer Memory SU008GBSFU320B02AB8 GB$59.97-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
TEAMGROUP Elite DDR4 8GB Single 3200MHz PC4-25600 CL22 (2933MHz or 2666MHz) Unbuffered Non-ECC 1.2V SODIMM 260-Pin Laptop Notebook PC Computer Memory Module Ram Upgrade - TED48G3200C22-S018 GB$59.99-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
parts-quick 8GB Compatible Memory for QNAP NAS Servers TVS-h674T DDR4 3200MHz SODIMM RAM (Equivalent to RAM-8GDR4K0-SO-3200)8 GB$59.99-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
SAMSUNG M471A1K43CB1-CRC 8GB DDR4 2400MH Memory Module (8 GB, 1 x 8 GB, DDR4, 2400 MHz, 260-Pin SO-DIMM)8 GB$60.71-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
Crucial 8GB DDR4 RAM, 2400MHz (PC4-19200) SODIMM 260-Pin Laptop Memory, Energy-Efficient DRAM Upgrade - CT8G4SFS824A8 GB$60.99-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
Samsung 8GB DDR4 3200MHz PC4-25600 (PC4-3200AA) CL22 SODIMM 1Rx16 Single Rank 1.2V 260-Pin Laptop, Notebook RAM Memory8 GB$62.86-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
SAMSUNG 8GB DDR4 3200MHz SODIMM PC4-25600 CL22 1Rx8 1.2V 260-Pin SO-DIMM Laptop Notebook RAM Memory Module M471A1K43DB1-CWE8 GB$64.00-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
A-Tech 8GB RAM for Synology DiskStation DS220+ NAS | DDR4 2400MHz PC4-19200 SODIMM 1.2V 260-Pin Non-ECC SO-DIMM Memory Upgrade8 GB$64.50-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
A-Tech 8GB RAM for Synology DiskStation DS1520+ NAS | DDR4 2400MHz PC4-19200 SODIMM 1.2V 260-Pin Non-ECC SO-DIMM Memory Upgrade8 GB$64.50-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
A-Tech 8GB RAM for Synology DiskStation DS720+ NAS | DDR4 2400MHz PC4-19200 SODIMM 1.2V 260-Pin Non-ECC SO-DIMM Memory Upgrade8 GB$64.50-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
Samsung 8GB M471A1K43DB1-CTD DDR4 PC4-21300, 2666MHZ, 260 Pin SODIMM, 1.2V, CL 19 Laptop Memory8 GB$64.76-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
A-Tech DDR4 RAM 8GB 3200MHz PC4-25600 SODIMM Laptop Memory8 GB$67.72-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
Kingston 8GB DDR4 2666MHZ SODIMM8 GB$67.97-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
A-Tech 8GB RAM for Synology DiskStation DS920+ NAS | DDR4 2400MHz PC4-19200 SODIMM 1.2V 260-Pin Non-ECC SO-DIMM Memory Upgrade8 GB$68.18-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
Kingston ValueRAM 8GB 2666MT/s DDR4 Non-ECC CL19 SODIMM 1Rx16 1.2V KVR26S19S6/8 Laptop Memory8 GB$69.99-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
Kingston Branded Memory 8GB DDR4 3200MT/s Single Rank SODIMM KCP432SS6/8 Notebook Memory8 GB$69.99-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
Kingston Technology (KVR24S17S8/8) ValueRAM 8GB 2400Mhz DDR4 Non-ECC CL17 SODIMM 1Rx88 GB$72.99-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
Kingston KVR26S19S8/8 Valueram - DDR4-8 GB - SO-DIMM 260-Pin - 2666 MHz/PC4-21300 - CL19-1.2 V - Unbuffered - Non-ECC8 GB$73.88-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
Kingston ValueRAM 8GB 3200MT/s DDR4 Non-ECC CL22 SODIMM 1Rx8 1.2V KVR32S22S8/8 Laptop Memory8 GB$74.49-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
SK Hynix 8GB HMA41GS6AFR8N-TF 2Rx8 PC4-2133P DDR4 Laptop RAM Memory8 GB$75.40-DDR4 SO-DIMMNon-ECC-Buy on Amazon
A-Tech 8GB RAM for QNAP TVS-h474 NAS | DDR4 3200MHz PC4-25600 SODIMM 1.2V 260-Pin Non-ECC SO-DIMM Memory Upgrade8 GB$76.75-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
A-Tech 8GB RAM for QNAP TS-464 NAS | DDR4 2933MHz PC4-23400 SODIMM 1.2V 260-Pin Non-ECC SO-DIMM Memory Upgrade8 GB$79.43-DDR4 SO-DIMM 2933MHzNon-ECC-Buy on Amazon
A-Tech 8GB RAM for QNAP TS-864eU-RP NAS | DDR4 2933MHz PC4-23400 SODIMM 1.2V 260-Pin Non-ECC SO-DIMM Memory Upgrade8 GB$79.43-DDR4 SO-DIMM 2933MHzNon-ECC-Buy on Amazon
A-Tech 8GB RAM for QNAP TS-664 NAS | DDR4 2933MHz PC4-23400 SODIMM 1.2V 260-Pin Non-ECC SO-DIMM Memory Upgrade8 GB$79.43-DDR4 SO-DIMM 2933MHzNon-ECC-Buy on Amazon
A-Tech 8GB RAM for QNAP TS-462 NAS | DDR4 2933MHz PC4-23400 SODIMM 1.2V 260-Pin Non-ECC SO-DIMM Memory Upgrade8 GB$79.43-DDR4 SO-DIMM 2933MHzNon-ECC-Buy on Amazon
Crucial 8GB DDR4 RAM 3200MHz (PC4-25600), Downclockable to 2933/2666MHz Laptop Memory, SODIMM 260-Pin CL22, Compatible with 13th Gen Intel Core and AMD Ryzen 7000 - CT8G4SFRA32A8 GB$79.49-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
Hynix HMA82GS6AFR8N-UH 16GB DDR4-2400 SODIMM16 GB$84.04-DDR4 SO-DIMMNon-ECC-Buy on Amazon
A-Tech 16GB DDR4 2133 MHz SODIMM PC4-17000 (PC4-2133P) CL15 2Rx8 Non-ECC Laptop RAM Memory Module16 GB$88.64-DDR4 SO-DIMM 2133MHzNon-ECC-Buy on Amazon
PUSKILL 16GB DDR4 3200MHz RAM (1x16GB) SODIMM CL22 Laptop16 GB$89.97-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN Non-ECC SODIMM Compatible with QNAP RAM-16GDR4K1-SO-2666 NAS Memory16 GB$92.99-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN Non-ECC SODIMM Compatible with QNAP RAM 16GDR4T0-SO-2666 NAS Memory16 GB$92.99-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
16GB 1X16GB DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN NEMIX RAM Non-ECC Unbuffered SODIMM Compatible with QNAP RAM-16GDR4K0-SO-2666, RAM-16GDR4K1-SO-266616 GB$92.99-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN Non-ECC SODIMM Compatible with Synology RackStation NAS16 GB$92.99-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
A-Tech 16GB DDR4 2400 MHz SODIMM PC4-19200 (PC4-2400T) CL17 2Rx8 Non-ECC Laptop RAM Memory Module16 GB$93.57-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
Timetec 16GB DDR4 2400MHz (PC4-2400T) PC4-19200 SODIMM Laptop RAM – 260-Pin 1.2V CL17 Non-ECC Unbuffered Memory Module for Laptop, Notebook, Mini PC, All-in-One16 GB$94.99-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
Timetec Premium 16GB DDR4 2400MHz (PC4-2400T) PC4-19200 SODIMM Laptop RAM – 260-Pin 1.2V CL17 Non-ECC Unbuffered Memory Module for Laptop, Notebook, Mini PC, All-in-One16 GB$94.99-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
SK HYNIX 16GB 2RX8 DDR4 SO-DIMM PC4-21300 2666MHZ Memory Module HMA82GS6JJR8N-VK16 GB$95.00-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
Timetec 16GB DDR4 2666MHz (PC4-2666V) PC4-21300 SODIMM Laptop RAM – 260-Pin 1.2V CL19 Non-ECC Unbuffered Memory Module for Laptop, Notebook, Mini PC, All-in-One16 GB$95.99-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
Timetec Premium 16GB DDR4 2666MHz (PC4-2666V) PC4-21300 SODIMM Laptop RAM – 260-Pin 1.2V CL19 Non-ECC Unbuffered Memory Module for Laptop, Notebook, Mini PC, All-in-One16 GB$95.99-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
Samsung M471A2K43DB1-CTD 16GB 2Rx8 PC4-2666V-SE1-1116 GB$97.50-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
Timetec 16GB DDR4 3200MHz (PC4-3200AA) PC4-25600 SODIMM Laptop RAM – 260-Pin 1.2V CL22 Non-ECC Unbuffered Memory Module for Laptop, Notebook, Mini PC, All-in-One16 GB$97.99-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
Timetec Premium 16GB DDR4 3200MHz (PC4-3200AA) PC4-25600 SODIMM Laptop RAM – 260-Pin 1.2V CL22 Non-ECC Unbuffered Memory Module for Laptop, Notebook, Mini PC, All-in-One16 GB$97.99-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
Crucial 16GB, 260-pin SODIMM, DDR4 PC4-19200,16 GB$98.99-DDR4 SO-DIMMNon-ECC-Buy on Amazon
A-Tech 16GB RAM for QNAP TS-932PX NAS | DDR4 2133MHz PC4-17000 SODIMM 2Rx8 1.2V 260-Pin Non-ECC SO-DIMM Memory Upgrade16 GB$100.11-DDR4 SO-DIMM 2133MHzNon-ECC-Buy on Amazon
Samsung 16GB DDR4 2666MHz PC4-21300 (PC4-2666V) CL19 SODIMM 2Rx8 Dual Rank 1.2V 260-Pin Laptop, Notebook RAM Memory16 GB$100.94-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
Samsung 16GB DDR4 PC4-21300, 2666MHZ, 260 PIN SODIMM, 1.2V, CL 19 laptop ram memory module16 GB$101.47-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
A-Tech DDR4 RAM 16GB 2666MHz PC4-21300 SODIMM Laptop Memory16 GB$101.54-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
Crucial 16GB DDR4 2666 MT/s (PC4-21300) SODIMM 260-Pin Memory - CT16G4SFRA26616 GB$102.41-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
Crucial 16GB, 260-pin SODIMM, DDR4 PC4-21300,16 GB$104.00-DDR4 SO-DIMMNon-ECC-Buy on Amazon
NVTEK 16GB (1X16GB) DDR4 3200MHz PC4-25600 SODIMM 2Rx8 1.2V CL22 260-PIN Non-ECC Laptop PC Computer Memory16 GB$104.79-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
A-Tech 16GB Module for Synology DS1618+ Laptop & Notebook Compatible DDR4 2400Mhz Memory Ram (ATMS362584A25831X1)16 GB$104.87-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
A-Tech 16GB Module for QNAP TVS-472XT TVS-672XT TVS-872XT NAS Servers - DDR4 2666MHz PC4-21300 Non-ECC SODIMM 1.2V Memory RAM (Replacement for QNAP RAM-16GDR4T0-SO-2666)16 GB$106.99-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
Samsung 16GB DDR4 3200MHz PC4-25600 (PC4-3200AA) CL22 SODIMM 1Rx8 Single Rank 1.2V 260-Pin Laptop, Notebook RAM Memory16 GB$108.97-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
Crucial 16GB DDR4 RAM, 3200MHz CL22 (or 2933MHz or 2666MHz) Laptop Memory, SODIMM 260-Pin, Compatible with 13th Gen Intel Core and AMD Ryzen 7000 - CT16G4SFRA32A16 GB$109.75-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
Crucial 16GB DDR4-2666 SODIMM for Mac16 GB$109.75-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
Samsung 16GB DDR4 3200MHz SODIMM PC4-25600 CL22 2Rx8 1.2V 260-Pin SO-DIMM Laptop Notebook RAM Memory Module M471A2K43DB1-CWE16 GB$109.97-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
parts-quick 16GB Memory for QNAP TS-832PX Compatible DDR4-2400 260 PIN RAM Module SODIMM16 GB$109.97-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
OWC 16GB Memory RAM Replacement for QNAP RAM-16GDR4K0-SO-266616 GB$109.99-DDR4 SO-DIMMNon-ECC-Buy on Amazon
OWC 16GB DDR4 3200MHz Non-ECC SODIMM 260-pin Memory RAM16 GB$109.99-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
OWC 16GB Memory RAM Compatible with Synology DiskStation DS1520+16 GB$109.99-DDR4 SO-DIMMNon-ECC-Buy on Amazon
OWC 16GB Memory RAM Compat with QNAP TS-332X TS-473 TS-673 TS-832PX TS-832X16 GB$109.99-DDR4 SO-DIMMNon-ECC-Buy on Amazon
OWC 16GB Memory RAM Compatible with QNAP TS-435XeU TS-473A TS-673A TS-873A16 GB$109.99-DDR4 SO-DIMMNon-ECC-Buy on Amazon
Silicon Power DDR4 16GB 3200MHz (PC4-25600) CL22 SODIMM 260-Pin 1.2V Non-ECC Laptop RAM Notebook Computer Memory SU016GBSFU320B02EC16 GB$112.97-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
Silicon Power DDR4 16GB 3200MHz (PC4-25600) CL22 SODIMM 260-Pin 1.2V Non-ECC Laptop RAM Notebook Computer Memory (SU016GBSFU320B02AC)16 GB$112.97-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
Kingston FURY Impact 8 GB 3200MHz DDR4 CL20 Laptop Memory Single Module KF432S20IB/88 GB$112.99-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
A-Tech DDR4 RAM 16GB 3200MHz PC4-25600 SODIMM Laptop Memory16 GB$115.26-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
PNY DDR4 16GB (1x16GB) 3200MHz CL20 Overclocked Notebook MemorySold by Amazon16 GB$119.99-DDR4 SO-DIMM 3200MHzNon-ECCPrimeBuy on Amazon
Samsung M471A2K43CB1-CRC 16GB DDR4 2400MHz Memory Module16 GB$120.24-DDR4 SO-DIMM 2400MHzNon-ECC-Buy on Amazon
G.SKILL Ripjaws DDR4 SO-DIMM Series DDR4 RAM 16GB (1x16GB) Up to 3200MT/s CL22-22-22-52 1.20V Unbuffered Non-ECC Notebook/Laptop Memory SO-DIMM (F4-3200C22S-16GRS)16 GB$124.99-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
Kingston KVR26S19D8/16 Valueram - DDR4-16 GB - SO-DIMM 260-Pin - 2666 MHz/PC4-21300 - CL19-1.2 V - Unbuffered - Non-ECC16 GB$126.74-DDR4 SO-DIMM 2666MHzNon-ECC-Buy on Amazon
16GB 260pin SODIMM DDR4 PC4-25600 NONECC16 GB$134.99-DDR4 SO-DIMM 3200MHzNon-ECC-Buy on Amazon
Synology SODIMM Non-ECC RAM DDR4-2666 4GB (D4NESO-2666-4G)4 GB$229.99-DDR4 SO-DIMMNon-ECC-Buy on Amazon
Synology D4NS01-4G RAM Module for DS225+, DS425+, DS725+4 GB$322.01-DDR4 SO-DIMMNon-ECC-Buy on Amazon

Frequently asked questions

How much RAM can the F2-425 and F4-425 take?

16GB. TerraMaster writes the limit as 16GB DDR4 non-ECC SODIMM.

How many memory slots do the F2-425 and F4-425 have?

One, with 4GB fitted from the factory.

Do the F2-425 and F4-425 use ECC memory?

No. TerraMaster specifies DDR4 non-ECC SO-DIMM.