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MINISFORUM ESP4B PCIe to 4 × NVMe M.2 Expansion Card

$169.00 $135.90 -19%
Specs: General | Estimated shipping time: Late October
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Built for More Storage Scenarios

Workstation Storage Expansion

Workstation Storage Expansion

Add up to four NVMe SSDs through one PCIe slot for video projects, AI datasets, virtual machines, cache, and large working files.

Large Local Storage

Large Local Storage

Connect up to four SATA 3.0 HDDs through OCuLink for backups, archives, media libraries, and capacity-focused storage. NVMe for speed. SATA for scale.

High-Speed External Storage

High-Speed External Storage

USB-C delivers up to 20Gbps for external SSDs and other compatible high-speed devices. Fast data access, built right into the card.

Homelab & Server Builds

Homelab & Server Builds

Combine NVMe, SATA, and USB expansion in one PCIe slot for compact servers, storage nodes, and Homelab systems. Turn one PCIe slot into a flexible storage hub.

Two Ways to Build Your Storage
ESP4B dynamically distributes PCIe bandwidth according to the number of installed NVMe SSDs, giving you the choice between higher per-drive bandwidth and greater storage density.
High-Performance Mode
Full-Population Mode
High-Performance Mode
2 × NVMe SSDs
SSD1: Up to PCIe 4.0 ×4 SSD2: Up to PCIe 4.0 ×4 Best suited for high-speed working drives, project files, cache storage, and workloads that prioritize per-drive performance.
Full-Population Mode
4× NVMe SSDs
SSD1 / SSD2 / SSD3 / SSD4: PCIe 4.0 ×2 Designed for larger local storage pools, multi-drive organization, datasets, project archives, and workloads that benefit from additional SSD capacity.

Every Connection. One Card.

① 1 × OCuLink
Supports up to four SATA 3.0 HDDs through the custom OCuLink-to-4×SATA cable.
SATA HDD
Power cables are supplied separately by the user
② 1 × USB Type-C
USB 3.2
Up to 20Gbps
4 × onboard M.2 NVMe SSD
SSD1: Up to PCIe 4.0 ×4
SSD2: Up to PCIe 4.0 ×4
SSD3: Up to PCIe 4.0 ×2
SSD4: Up to PCIe 4.0 ×2
With four SSDs installed, all slots operate at PCIe 4.0 ×2.

PCIe 4.0 ×4
PCIe 4.0 ×4 host interface.
Supports PCIe 4.0 ×4 or higher host slots.

Packing List

PCIe Card

SATA Data cable

Long Retaining Strip

Installation Screw Set

User Manual

PCIe Card

SATA Data cable

Long Retaining Strip

Installation Screw Set

User Manual

ESP4B Specification

Product Name

ESP4B PCIe Expansion Card

Product Type

PCIe to 4 × NVMe M.2 Expansion Card

Onboard Chipset

AMD B650/B850

Platform Support

Intel / AMD platforms

Host Interface / Requirement

PCIe 4.0 x 4; 

requires a PCIe 4.0 x 4 or higher slot on the host system
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in.
cm
Size
Bust
Waist
Hips
US/CAN
XS
32-33
24-25
35-36
0/1
S
34-35
26-27
37-38
3/5
M
36-37
28-29
39-40
7/9
L
38.5-40
30.5-32
41.5-43
11/13
XL
41 1/2
33 1/2 		44 1/2 15
1X 44-45.5 37-38.5 47-48.5 14/16
2X
47-49		 40-42 50-52 18/20
3X 51-53 44-46 54-56 22/24
Size
Bust
Waist
Hips
UK
EU 		AUS
XS
81-84
61-64
89-91
2/4
32/34 		4/6
S
86-89
66-69
94-97
6/8
36/38 		8
M
91-94
71-74
99-102
10/12
40 		10/12
L
98-102
77-81
105-109
14
42 		14/16
XL
105
85
113
16 		44 18
1X 112-116 94-98 119-123 18 44/46 18/20
2X 119-124 102-107 127-132 20/22 48/50 22/24
3X 129-135 112-117 137-142 24/26 52/54 26/28
Jeans, Bottoms, + Skirts
in.
cm
Size
Waist  		Hips  US/CAN
XS
24-25
35-36
0/1
S
26-27
37-38
3/5
M
28-29
39-40
7/9
L
30.5-32
41.5-43
11/13
XL
33 1/2
44 1/2
15
1X 37-38.5 47-48.5 14/16
2X 40-42 50-52 18/20
3X 44-46 54-56 22/24
Size
Waist
Hips
UK
EU 		AUS
XS
61-64
89-91
2/4
32/34 		4/6
S
66-69
94-97
6/8
36/38 		8
M
71-74
99-102
10/12
40 		10/12
L
77-81
105-109
14
42		 14/16
XL
85
113
16
44		 18
1X 94-98 119-123 18 44/46 18/20
2X 102-107 127-132 20/22 48/50 22/24
3X 112-117 137-142 24/26 52/54 26/28
Shoes + Boots
Size  US/CAN
UK
EU
AUS
5 		5 3 36 5
5.5 5.5 3.5 36.5 5.5
6 6 4 37 6
6.5 6.5 4.5 37.5 6.5
7 7 5 38 7
7.5 7.5 5.5 38.5 7.5
8 8 6 39 8
8.5 8.5 6.5 39.5 8.5
9 9 7 40 9
9.5 9.5 7.5 40.5 9.5
10 10 8 41 10
Swimwear + Lingerie
in.
cm
Size
Bust
Waist
Hips
Cup size
XS
32-33
24-25
35-36
32A-32B
S
34-35
26-27
37-38
32C-34B
M
36-37
28-29
39-40
34C-36B
L
38.5-40
30.5-32
41.5-43
36C-38C
XL
41 1/2
33 1/2		 44 1/2 38D-40D
1X 44-44.5 37-38.5 47-48.5 42C-42D
2X 47-49 40-42 50-52 44C-44D
3X 51-53 44-46 54-56 46C+
Size
Bust
Waist
Hips
UK 		EU
AUS
XS
81-84
61-64
89-91
70B-70C
70B-70C
10A-10B
S
86-89
66-69
94-97
70D-75C 		70D-75C
10C-12B
M
91-94
71-74
99-102
75D-80C 		75D-80C
12C-14B
L
98-102
77-81
105-109
80D-85D 		80D-85D
14C-16C
XL
105
85
113
85DD-90DD 		85DD-90DD 16D-18D
Men
Shirts
in.
cm
Size
Chest
Waist
S
35-37
29-31
M
38-40
32-34
L
42-44
36-38
XL
46-48
40-42
XXL
50-52
44-46
XXXL
54-56
48-50
Size
Chest
Waist
S
89-94
73.7-78.7
M
96.5-101.5
81.3-86.3
L
106.7-111.7
91.4-96.5
XL
116.8-121.9
101.5-106.7
XXL
127-132
111.7-116.8
XXXL
137.1-142.2
121.9-127
Bottoms
in.
cm
Size
Bottom (US)
Seat/Low (IN)
Inseam
S
28-30
35-36
32
M
32-34
36-40
32
L
36-38
40-44
32
XL
38-40
44-47
32
XXL
42-44
47-49
32
XXXL
46-48
49-51
32
Size
Bottom
Seat/Low
Inseam
S
71.1-76.2
88.9-91.4
81.3
M
81.2-86.3
91.4-101.6
81.3
L
91.4-96.5
106.7-111.7
81.3
XL
96.5-101.6
111.7-119.4
81.3
XXL
106.7-111.7
119.4-124.4
81.3
XXXL
116.8-121.9
124.4-129.5
81.3
Tops
in.
cm
Size
Top(US)
Chest(IN)
S
34-36
35-37
M
38-40
38-40
L
42
42-44
XL
46
46-48
XXL
48
50-52
XXXL
50
54-56
Size
Top
Chest
S
86.4-91.4
88.9-94
M
96.5-101.5
96.5-101.5
L
106.7
106.7-111.7
XL
116.8
116.8-121.9
XXL
121.9
127-132
XXXL
127
137.1-142.2
Jeans
in.
cm
Size
Waist
28
28
30
30
32
32
34
34
36
36
38
38
40
40
42
42
Size
CM
28
71
30
76
32
81
34
86
36
91
38
96
40
101.6
42
106.7
Kids
Clothing
in.
cm
US Size
Age (years)
Height 		Weight (lb)
Bust
Waist
Hip
Inseam
2
1.5-2
33-36 		30-33
20-21
19.5-20.5
20.5-21.5
13.4-14.5
3
2-3
36-39 		33-36
20.5-21.5
20-21
21.5-22.5
15-16
4
3-4
39-42 		36-40
21.5-22.5
21-22
22.5-23.5
16-17.5
5
4-5
42-45 		42-46
22.5-23.5
22-23
23.5-24.5
18-19
6
5-6
45-48 		48-54
23.5-24.5
23-24
24.5-25.5
19.5-20.5
7 6-7 48-51 56-60 25-26 25 26 1/2 21-22
8 7-8 51-53 62-66 26.5-27.5 27 1/2 28 22.5-23.5
10 10 53-55 68-74 28-29 29 29 1/2 24-25
12 12 55-59 76-84 29.5-30.5 30 1/2 31 25.5-26.5
14 14 59-63 86-96 31-32 32 32 1/2 27-28
US Size
Age (years)
Height 		Weight (kg)
Chest
Waist
Hip
Inseam
2
1.5-2
84-91.5 		13.6-15
50.8-53.5
49.5-52.1
52.1-54.6
34.3-36.8
3
2-3
91.5-99 		15-16.3
52.1-54.6
50.8-53.5
54.6-57.2
36.8-40.6
4
3-4
99-106.7 		16.3-18.1
54.6-57.2
53.5-55.9
57.2-59.7
40.6-44.5
5
4-5
106.7-114.3 		19.1-20.9
57.2-59.7
55.9-58.4
59.7-62.2
44.5-48.3
6
5-6
114.3-121.9 		21.8-24.5
59.7-62.2
58.4-61
62.2-64.8
48.3-52.1
7 6-7 121.9-129.5 25.4-27.2 63.5-66 63.5 67.3 53.3-55.9
8 7-8 129.5-134.6 28.1-29.9 67.3-69.9 69.9 71.1 57.2-59.7
10 10 134.6-139.7 30.8-33.6 71.1-73.7 73.7 74.9 61-63.5
12 12 139.7-149.9 34.5-38.1 74.9-77.5 77.5 78.7 64.8-67.3
14 14 149.9-160 39-43.5 78.7-81.3 81.3 82.6 68.6-71.1
Shoes + Boots
Size US/CAN
UK
EU
7
6
23
8
7
24
9
8
25
10
9
27
11
10
28
12
11
30
13
12
31
X