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Motherboards with 3 PCIe x16 Slots

All motherboards

6 motherboards with 3 PCIe x16 Slots. Most cost $260 to $863, and half cost less than $795.

All filtersFilters (1)×
PCIe x16 slots: 3  ×Clear all
BrandSupermicro3ASUS1GIGABYTE1
SocketLGA20112LGA17001LGA2011-31LGA47101sTR51
Memory typeDDR43DDR53
PCIe x16 slots36
PriceUnder $3001Under $8002Under $9002$700 & above4$800 & above2
Clear allShow 6 motherboards
PCIe x16 slots: 3  ×6 resultsSort byRecommendedSpec scorePrice: low to highPrice: high to low
ASUSSpec score 9.1

sTR5, DDR5, 1TB, 3 PCIe x16 slots

+Supports up to 1024 GB of memory
+ECC memory support for error correction
+Three PCIe x16 slots for multiple expansion cards
−Uses the large sTR5 socket for Threadripper PRO processors
$851.99
as of 11/03/2026 21:56 PST - Details
SupermicroSpec score 8.6

LGA2011, DDR4, 16 Memory slots, 1TB

+Supports up to 1024 GB of RAM
+Sixteen RAM slots for large memory capacity
+Three PCIe x16 slots for expansion cards
−Only 1G LAN speed
$863.20
as of 11/04/2026 00:23 PST - Details
SupermicroSpec score 8.6

LGA4710, DDR5, 8 Memory slots, 2TB

+Supports up to 2TB of DDR5 memory
+Three PCIe x16 slots for expansion cards
+ECC memory support for error correction
−Eight RAM slots, fewer than dual socket boards
$787.00
as of 11/04/2026 07:10 PST - Details
GenericSpec score 8.2

LGA2011-3, E-ATX, DDR4, 8 Memory slots

+Dual CPU socket design for high processing capacity
+Eight DDR4 slots supporting up to 512GB
+Three PCIe x16 slots for expansion cards
−Large E-ATX form factor needs a spacious case
−1G network speed is slower than newer boards
$259.90
as of 11/03/2026 23:31 PST - Details
GIGABYTESpec score 8.6

LGA1700, ATX, DDR5, 4 Memory slots

+Four M.2 slots for multiple storage drives
+Four DDR5 RAM slots supporting up to 128GB
+Three PCIe x16 slots for expansion cards
No price recorded yet.
SupermicroSpec score 8.6

LGA2011, DDR4, 16 Memory slots, 1TB

+Supports up to 1024 GB of RAM
+Sixteen RAM slots for large memory capacity
+Three PCIe x16 slots for expansion cards
−Only 1G LAN speed
$795.00
as of 11/04/2026 00:23 PST - Details

Compare specs

motherboardSocketMemory typeMemory slotsMaximum memoryPCIe x16 slotsSpec scorePrice
sTR5DDR51TB39.1$851.99
as of 11/03/2026 21:56 PST - Details
LGA2011DDR4161TB38.6$863.20
as of 11/04/2026 00:23 PST - Details
LGA4710DDR582TB38.6$787.00
as of 11/04/2026 07:10 PST - Details
LGA2011-3DDR48512GB38.2$259.90
as of 11/03/2026 23:31 PST - Details
LGA1700DDR5438.6No current price
LGA2011DDR4161TB38.6$795.00
as of 11/04/2026 00:23 PST - Details

Before you buy

Other PCIe x16 slots options

PC Cases264CPU Coolers393Processors247Data Center GPUs82Graphics Cards371Power Supplies237Memory374Storage Drives577Binoculars228Network Cables1,382Cameras2,556Chromebooks196

Popular filters

DDR4 Motherboards199DDR5 Motherboards190ATX Motherboards165mATX Motherboards152Motherboards under $200114Motherboards under $150108AM5 Motherboards99Motherboards with 4 Memory Slots96

Motherboards by use

Gaming Motherboards81LGA1700 DDR5 Motherboards47Budget Motherboards58Workstation Motherboards60

Related product types

Motherboards with 1 PCIe x16 Slot74Motherboards with 2 PCIe x16 Slots17Motherboards with 4 PCIe x16 Slots9

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