Which is better for a Threadripper PRO build?

The ASUS. It uses Socket sTR5 and the AMD WRX90 chipset, so it is the only one of the two that fits a Threadripper PRO CPU.

Which holds more memory?

The Gigabyte, on paper. It is rated for 2 TB of octa-channel DDR5 at 4800 MHz. The ASUS has 8 DIMM slots but its listing states a 10 GB maximum, which does not match the slot count.

Which has more PCIe 5.0 slots?

The ASUS lists 7 PCIe 5.0 x16 slots. Gigabyte does not publish a slot count for the W790 AI TOP in the specs shown.

Do both support ECC memory?

Yes. Both boards list ECC support and DDR5 DIMM slots.

Is the ASUS worth the extra?

There is no Gigabyte price to compare against. The ASUS has ranged from $1,191.99 to $1,234.51 since November 3, 2026, so judge the premium against your need for 7 PCIe 5.0 slots and 10G Ethernet.

Which is easier to fit in a case?

The Gigabyte. Extended ATX is more common in large consumer cases than the ASUS SSI EEB board at 13 x 12 inches.

ASUS Pro WS WRX90E-SAGE SE vs Gigabyte W790 AI TOP Motherboard

Buy the ASUS Pro WS WRX90E-SAGE SE if you want AMD Ryzen Threadripper PRO with 7 full-speed PCIe 5.0 x16 slots and 10G Ethernet built in. Buy the Gigabyte W790 AI TOP if you are building around Intel Xeon W and need 2 TB of octa-channel DDR5. The ASUS has ranged from $1,191.99 to $1,234.51 since November 3, 2026; no price was given for the Gigabyte, so compare stores on our product page.

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