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$4,368.00
SYS-421GU-TNXR

SYS-421GU-TNXR

Supermicro 4U 6Bays Dual Processor Rackmount Server
Supports up to 350W TDP CPUs (Air Cooled)
Supports up to 350W TDP CPUs (Liquid Cooled)​
Default 5 heavy duty fans with optimal fan speed control
optional Liquid Cooling:
Direct to Chip (D2C) Cold Plate
  • 32 DIMM slots Up to 8TB: 32x 256 GB DRAM Memory Type: 4800MHz ECC DDR5, 32 DIMM slots Up to 8TB: 32x 256 GB DRAM Memory Type: 5600MTs ECC DDR5
  • 8 PCIe Gen 5.0 X16 LP Slots
  • Flexible networking options
  • 2 M.2 NVMe and SATA for boot drive only, 6x 2.5" Hot-swap  NVMe/SATA/SAS drive bays
  • High Performance Computing, AI/Deep Learning Training, Large Language Model (LLM) Natural Language Processing
 
Storage configuration notice:
6x 2.5" HDD drive
 
2x M.2 drive
To maintain quality and integrity, this product is sold only as a completely-assembled system (with minimum 2 CPUs, 4 DIMMs, 1 Storage Device HDD/HDS/M.2 and 1 NIC).

Note: Image above may show a varied configuration or optional part. Please refer to parts list for standard parts included.

Configure Options

CPU ▼
Qty / Pick Option Price
Intel® Xeon® Scalable 4th Gen Silver Processor 4410Y (2.00 GHz 155W)
Intel® Xeon® Scalable 4th Gen Silver Processor 4416+ (2.00 GHz 165W)
Intel® Xeon® Scalable 4th Gen Silver Processor 4410T (2.70 GHz 150W)
Intel® Xeon® Scalable 4th Gen Gold Processor 6448H (2.40 GHz 250W)
Intel® Xeon® Scalable 4th Gen Gold Processor 6438Y (2.00 GHz 205W)
Intel® Xeon® Scalable 4th Gen Gold Processor 6430 (2.10 GHz 270W)
Intel® Xeon® Scalable 4th Gen Gold Processor 6428N (1.80 GHz 185W)
Intel® Xeon® Scalable 4th Gen Gold Processor 6426Y (2.50 GHz 185W)
Intel® Xeon® Scalable 4th Gen Gold Processor 6421N (1.80 GHz 185W)
Intel® Xeon® Scalable 4th Gen Gold Processor 5418N (1.80 GHz 165W)
Intel® Xeon® Scalable 4th Gen Gold Processor 5416S (2.00 GHz 150W)
Intel® Xeon® Scalable 4th Gen Gold Processor 5411N (1.90 GHz 165W)
Intel® Xeon® Scalable 4th Gen Platinum Processor 8490H (1.90 GHz 350W)
Intel® Xeon® Scalable 4th Gen Platinum Processor 8480+ (2.0 GHz 350W)
Intel® Xeon® Scalable 4th Gen Platinum Processor 8470N (1.70 GHz 300W)
Intel® Xeon® Scalable 4th Gen Platinum Processor 8470 (2.00 GHz 350W)
Intel® Xeon® Scalable 4th Gen Platinum Processor 8468V (2.40 GHz 330W)
Intel® Xeon® Scalable 4th Gen Platinum Processor 8468H (2.10 GHz 330W)
Intel® Xeon® Scalable 4th Gen Platinum Processor 8468 (2.10 GHz 350W)
Intel® Xeon® Scalable 4th Gen Platinum Processor 8462Y+ (2.80 GHz 300W)
Intel® Xeon® Scalable 4th Gen Platinum Processor 8460Y+ (2.20 GHz 300W)
Intel® Xeon® Scalable 4th Gen Platinum Processor 8460H (2.20 GHz 330W)
Intel® Xeon® Scalable 4th Gen Platinum Processor 8458P (2.70 GHz 350W)
Intel® Xeon® Scalable 4th Gen Platinum Processor 8454H (2.10 GHz 270W)
Intel® Xeon® Scalable 4th Gen Platinum Processor 8452Y (2.00 GHz 300W)
Intel® Xeon® Scalable 4th Gen Platinum Processor 8450H (2.00 GHz 250W)
Intel® Xeon® Scalable 4th Gen Platinum Processor 8444H (2.90 GHz 270W)
Intel® Xeon® Scalable 5th Gen Bronze Processor 3508U (2.10 Ghz 125W)
Intel® Xeon® Scalable 5th Gen Silver Processor 4509Y (2.60 Ghz 125W)
Intel® Xeon® Scalable 5th Gen Silver Processor 4510 (2.40 Ghz 150W)
Intel® Xeon® Scalable 5th Gen Silver Processor 4510T (2.00 Ghz 115W)
Intel® Xeon® Scalable 5th Gen Silver Processor 4514Y (2.00 Ghz 150W)
Intel® Xeon® Scalable 5th Gen Silver Processor 4516Y+ (2.20 Ghz 185W)
Intel® Xeon® Scalable 5th Gen Gold Processor 5512U (2.10 Ghz 185W)
Intel® Xeon® Scalable 5th Gen Gold Processor 5515+ (3.20 Ghz 165W)
Intel® Xeon® Scalable 5th Gen Gold Processor 5520+ (2.20 Ghz 205W)
Intel® Xeon® Scalable 5th Gen Gold Processor 6526Y (2.80 Ghz 195W)
Intel® Xeon® Scalable 5th Gen Gold Processor 6530 (2.10 Ghz 270W)
Intel® Xeon® Scalable 5th Gen Gold Processor 6534 (3.90 Ghz 195W)
Intel® Xeon® Scalable 5th Gen Gold Processor 6538N (2.10 Ghz 205W)
Intel® Xeon® Scalable 5th Gen Gold Processor 6538Y+ (2.10 Ghz 205W)
Intel® Xeon® Scalable 5th Gen Gold Processor 6542Y (2.90 Ghz 250W)
Intel® Xeon® Scalable 5th Gen Gold Processor 6544Y (3.60 Ghz 270W)
Intel® Xeon® Scalable 5th Gen Gold Processor 6548N (2.80 Ghz 250W)
Intel® Xeon® Scalable 5th Gen Gold Processor 6548Y+ (2.50 Ghz 250W)
Intel® Xeon® Scalable 5th Gen Gold Processor 6554S (2.20 Ghz 270W)
Intel® Xeon® Scalable 5th Gen Gold Processor 6558Q (3.20 Ghz 350W)
Intel® Xeon® Scalable 5th Gen Platinum Processor 8558 (2.10 Ghz 330W)
Intel® Xeon® Scalable 5th Gen Platinum Processor 8558P (2.70 Ghz 350W)
Intel® Xeon® Scalable 5th Gen Platinum Processor 8558U (2.00 Ghz 300W)
Intel® Xeon® Scalable 5th Gen Platinum Processor 8562Y+ (2.80 Ghz 300W)
Intel® Xeon® Scalable 5th Gen Platinum Processor 8568Y (2.30 Ghz 350W)
Intel® Xeon® Scalable 5th Gen Platinum Processor 8570 (2.10 Ghz 350W)
Intel® Xeon® Scalable 5th Gen Platinum Processor 8571N (2.40 Ghz 300W)
Intel® Xeon® Scalable 5th Gen Platinum Processor 8580 (2.00 Ghz 350W)
Intel® Xeon® Scalable 5th Gen Platinum Processor 8581V (2.00 Ghz 270W)
Intel® Xeon® Scalable 5th Gen Platinum Processor 8592+ (1.90 Ghz 350W)
Intel® Xeon® Scalable 5th Gen Platinum Processor 8592V (2.00 Ghz 330W)
MEMORY ▼
Qty / Pick Option Price
Samsung 16GB DDR5 5600MHz ECC RDIMM Memory (Recommend for Xeon 5th Gen CPU)
Samsung 32GB DDR5 5600MHz ECC RDIMM Memory (Recommend for Xeon 5th Gen CPU)
Samsung 64GB DDR5 5600MHz ECC RDIMM Memory (Recommend for Xeon 5th Gen CPU)
Enterprise-Class HDD/SSD ▼
Qty / Pick Option Price
Samsung PM897 2.5" SATA 6Gb/s SSD 960GB
Samsung PM897 2.5" SATA 6Gb/s SSD 1.92TB
Samsung PM897 2.5" SATA 6Gb/s SSD 3.84TB
Samsung 870 QVO 2.5" SATA 6Gb/s SSD 2TB
Samsung 870 QVO 2.5" SATA 6Gb/s SSD 4TB
Samsung 870 QVO 2.5" SATA 6Gb/s SSD 8TB
Samsung PM893 2.5" SATA 6Gb/s SSD 240GB
Samsung PM893 2.5" SATA 6Gb/s SSD 960GB
Samsung PM893 2.5" SATA 6Gb/s SSD 1.92TB
Samsung PM893 2.5" SATA 6Gb/s SSD 3.84TB
Samsung PM893 2.5" SATA 6Gb/s SSD 7.68TB
Samsung SM883 2.5" SATA III SSD 480GB
Samsung PM893 2.5" SATA 6Gb/s SSD 480GB
Samsung 870 EVO 2.5" SATA 6Gb/s SSD 250GB
Samsung 870 EVO 2.5" SATA 6Gb/s SSD 500GB
Samsung 870 EVO 2.5" SATA 6Gb/s SSD 1TB
Samsung 870 EVO 2.5" SATA 6Gb/s SSD 2TB
Samsung 870 EVO 2.5" SATA 6Gb/s SSD 4TB
NETWORK CARD ▼
Qty / Pick Option Price
Intel® 1G Ethernet Adapter I350-T2V2 (2x RJ-45)
Intel® 1G Ethernet Adapter I350-T4V2 (4x RJ-45)
Intel® 10G Ethernet Adapter X710-DA2 (2x QSFP+)
Intel® 40G Ethernet Adapter XL710-QDA1 (1x QSFP+)
Intel® 40G Ethernet Adapter XL710-QDA2 (2x QSFP+)
Intel® 10G Ethernet Adapter X550-T1 (1x RJ45)
Intel® 10G Ethernet Adapter X550-T2 (2x RJ45)
Intel® 25G Ethernet Adapter XXV710-DA1 (1x SFP28)
Intel® 25G Ethernet Adapter XXV710-DA2 (2x SFP28)
Intel® 10G Ethernet Adapter X520-DA2 (2x SFP+)
Mellanox NVIDIA 10/25GbE MCX512A-ACAT ConnectX-5 Ethernet Adapter (2x QSFP28)
Mellanox NVIDIA 100GbE MCX516A-CCAT ConnectX-5 Ethernet Adapter (2x QSFP28)
Mellanox NVIDIA 200GbE MCX653105A-HDAT-SP ConnectX-6 VPI Ethernet Adapter (1x QSFP56)
Mellanox NVIDIA 200GbE MCX653106A-HDAT-SP ConnectX-6 VPI Ethernet Adapter (2x QSFP56)
Broadcom NetXtreme 1G PCIe 2.0 x1 Ethernet Card (2x RJ45)
Broadcom NetXtreme 1G PCIe 2.0 x4 Ethernet Card (4x RJ45)
Broadcom NetXtreme 10G PCIe 3.0 x8 Ethernet Card (2x RJ45)
Broadcom NetXtreme 10G PCIe 3.0 x8 Ethernet Card (2x SFP+)
Broadcom NetXtreme 25G PCIe 3.0 x8 Ethernet Card (2x SFP28)
Broadcom NetXtreme 25G PCIe 4.0 x16 Ethernet Card (4x SFP28)
Broadcom NetXtreme 100G PCIe 4.0 x16 EthernetCard (2x QSFP56)
OPERATING SYSTEM ▼
Qty / Pick Option Price
*Please contact our sales for more operating system options
Debian Linux (No Media) (32-Bit/64-Bit)
Fedora Linux Desktop Edition (No Media) (32-Bit/64-Bit)
Ubuntu Linux LTS Server Edition (No Media) (32-Bit/64-Bit)
CentOS Enterprise Linux (No Media) (32-Bit/64-bit)
Fedora Linux Workstation Edition 64-bit (No Media)
Microsoft Windows Server 2025 Standard 64-bit-1User
WARRANTY ▼
Qty / Pick Option Price
*1 Year Parts Replacement Warranty
3 Year Parts Replacement Warranty - Server Value $500 to $2000
3 Year Parts Replacement Warranty - Server Value $2001 to $4000
3 Year Parts Replacement Warranty - Server Value $4001 to $7000
3 Year Parts Replacement Warranty - Server Value $7001 to $10000
3 Year Parts Replacement Warranty - Server Value Over $10000
GPU/Coprocessor ▼
Qty / Pick Option Price
*No GPU
NVIDIA L40S 48GB GDDR6 GPU Card
NVIDIA A100 80GB HBM2e GPU Card
NVIDIA RTX 4000 ADA GDDR6 Video Card 20GB
NVIDIA RTX 5000 ADA GDDR6 Video Card 32GB
NVIDIA RTX 4500 ADA GDDR6 Video Card 24GB
NVIDIA RTX 6000 ADA GDDR6 Video Card 48GB
NVIDIA L40 48GB GDDR6 GPU Card
NVIDIA H100 80GB HBM2e GPU Card
NVMe M.2 ▼
Qty / Pick Option Price
*No NVMe M.2 Drives
Samsung 980 PRO MZ-V8P500B/AM M.2 NVMe SSD 500GB
Samsung 980 PRO MZ-V8P1T0B/AM M.2 NVMe SSD 1TB
Samsung 970 EVO Plus MZ-V7S1T0B/AM M.2 NVMe SSD 1TB
Samsung 970 EVO Plus MZ-V7S2T0B/AM M.2 NVMe SSD 2TB
Samsung 980 PRO MZ-V8P2T0B/AM M.2 NVMe SSD 2TB
Samsung 970 EVO Plus MZ-V7S500B/AM M.2 NVMe SSD 500GB
WD Black SN850 M.2 G4 NVMe SSD 500GB
WD Black SN850 M.2 G4 NVMe SSD 1TB
WD Black SN850 M.2 G4 NVMe SSD 2TB
SAMSUNG PM9A3 M.2 Nvme SSD 960GB
SAMSUNG PM9A3 M.2 Nvme SSD 1.92TB
SAMSUNG PM9A3 M.2 Nvme SSD 3.84TB
Samsung 990 PRO MZ-V9P1T0B/AM M.2 NVMe SSD 1TB
Samsung 990 PRO MZ-V9P2T0B/AM M.2 NVMe SSD 2TB
Samsung 970 EVO Plus MZ-V7S500B/AM M.2 NVMe SSD 250GB
Samsung 990 PRO MZ-V9P4T0B/AM M.2 NVMe SSD 4TB
Samsung 980 EVO MZ-V8V250B/AM M.2 NVMe SSD 250GB
Samsung 980 EVO MZ-V8V500B/AM M.2 NVMe SSD 500GB
Samsung 980 EVO MZ-V8V1T0B/AM M.2 NVMe SSD 1TB
Samsung 990 EVO MZ-V9E1T0B/AM M.2 NVMe SSD 1TB
Samsung 990 EVO MZ-V9E2T0B/AM M.2 NVMe SSD 2TB

Technical Specifications

Processor
CPU:
Dual Socket E (LGA-4677)
5th Gen Intel® Xeon® / 4th Gen Intel® Xeon® Scalable processors

Core Count:
Up to 56C/112T; Up to 112.5MB Cache per CPU

Note:
Supports up to 350W TDP CPUs (Air Cooled)
Supports up to 350W TDP CPUs (Liquid Cooled)​

Max GPU Count:
Up to 4 onboard GPU(s)

Supported GPU:
NVIDIA SXM: HGX H100 4-GPU (80GB)
View GPU Options

CPU-GPU Interconnect:
PCIe 5.0 x16 CPU-to-GPU Interconnect

GPU-GPU Interconnect:
NVIDIA® NVLink®

Certification:
NVIDIA Certified
Memory
Memory
Slot Count: 32 DIMM slots
Max Memory (2DPC): Up to 8TB 5600MT/s ECC DDR5
 
 
Memory Voltage
1.1V
Chassis
4U Rackmount Chassis
Dimensions
Height:
7" (175.6 mm)
Width:
17.67" (449 mm)
Depth:
32.79" (833 mm)
Drive Bays
Drive Bays Configuration:
Default: Total 6 bay(s)
6 front hot-swap 2.5" NVMe/SATA drive bay(s)

M.2:
2 M.2 NVMe/SATA slot(s) (M-key)
Expansion Slots
PCI-Express (PCIe) Configuration:
Default
1 PCIe 5.0 x16 LP slot(s)
7 PCIe 5.0 x16 LP slot(s)
Power Supply
4x 3000W Redundant Titanium Level power supplies
Dimension (WxHxL):
106.5 x 82.1 x 245.5 mm

+12V:
Max: 91.66A / Min: 0A (200Vac-240Vac)

12V SB:
Max: 3A / Min: 0A

AC Input:
3000W: 0240Vdc / 50-60Hz (for CQC only)
2880W: 200-207Vac / 50-60Hz
3000W: 207-240Vac / 50-60Hz

Output Type:
Backplanes (gold finger)
Onboard Devices
Chipset:
Intel® C741

Network Connectivity:
2 RJ45 10GbE with Intel® X710-AT2

NVMe
Front Panel
LED:
Hard drive activity LED
Network activity LEDs
Power status LED
System Overheat & Power Fail LED

Buttons:
Power On/Off button
System Reset button
Input / Output
Video:
1 VGA port(s)
Cooling
Fans:
5 heavy duty fans with optimal fan speed control

Air Shroud:
1 Air Shroud(s)

Liquid Cooling:
Direct to Chip (D2C) Cold Plate (optional)
BIOS
BIOS Type:
AMI 32MB SPI Flash EEPROM
Operating Environment
Environmental Spec.:
Operating Temperature: 10°C ~ 35°C (50°F ~ 95°F)
Non-operating Temperature: -40°C to 60°C (-40°F to 140°F)
Operating Relative Humidity: 8% to 90% (non-condensing)
Non-operating Relative Humidity: 5% to 95% (non-condensing)

Frequently Asked Questions

Yes. Spectrum Servers offers custom configurations for all server products. Use the Configure Options section above to select processors, memory, storage and other components, or request a custom quote.

All products sold by Spectrum Servers include the manufacturer's standard warranty. Extended warranty options are available. Contact our sales team at sales@spectrumservers.com or call +1 (626) 956-0100 for details.

Lead times vary by product and configuration. In-stock items typically ship within 1–3 business days. Custom configured systems may take 5–15 business days. Contact us for specific availability and lead time information.

Yes. Spectrum Servers provides technical support for all products sold. Our engineers are available Monday–Friday 8:30AM–5:30PM PST. Reach us at +1 (800) 526-8650 or email sales@spectrumservers.com.

Yes. Volume discounts are available for orders of 5 or more units. Please request a quote or contact our sales team directly for pricing on larger orders.
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