GIGABYTE AMD 990FX + SB950 AM3+ SATA 6Gb/s USB 3.0 ATX AMD Motherboard GA-990FXA-UD5
Status: GIGABYTE AMD 990FX + SB950 AM3+ SATA 6Gb/s USB…: Unavailable on Amazon as of . SpecPicks has no in-stock listing with matching specs on file; the search below lists current offers. eBay sellers may still list this model new or used.
Bottom line: The GIGABYTE AMD 990FX + SB950 AM3+ SATA 6Gb/s USB 3.0 ATX AMD Motherboard: Five PCIe 2.0 slots support 3-way AMD CrossFireX and NVIDIA SLI on one board; main trade-off: AM3+/AM3 socket only: no path to Ryzen or any modern AMD CPU upgrade.
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Currently unavailable on Amazon. Not the same product — 3 in-stock alternatives:
Similar: GIGABYTE B460M DS3H V2 — $185.23 on Amazon as of 2026-10-07 04:12 UTC (price may vary).
Similar: Micro Center AMD 5500 Processor with GIGABYTE… — $229.99 on Amazon as of 2026-10-07 04:12 UTC (price may vary).
Similar: GIGABYTE Z490 AORUS Elite — $385.00 on Amazon as of 2026-10-07 04:18 UTC (price may vary).
Pros & Cons
Pros
- ✓ Five PCIe 2.0 slots support 3-way AMD CrossFireX and NVIDIA SLI on one board
- ✓ 8+2 phase CPU VRM designed for high-TDP AM3+ FX chips like the FX-8350
- ✓ 4 DDR3 DIMM slots reach 32GB dual-channel, with DDR3-2000 via overclock
- ✓ Retro-PC friendly rear I/O: PS/2, IEEE 1394a, optical S/PDIF, 8 USB 2.0 ports
Cons
- ✗ AM3+/AM3 socket only: no path to Ryzen or any modern AMD CPU upgrade
- ✗ DDR3 1.5V memory only, so existing DDR4/DDR5 kits will not transfer over
- ✗ USB 3.0 limited to 4 ports total (2 rear), with no USB-C anywhere
- ✗ PCIe 2.0 lanes and the third x16 slot dropping to x8 bottleneck modern GPUs
Manufacturer description
Supports newest AMD AM3+ FX/AM3 Phenom II series processors, Advanced 8+2 phase CPU VRM power design for AMD high-TDP CPU support,5 PCI-E 2.0 interfaces for 3way AMD CrossFireX and SLI multi-graphics support, AMD SB950 provides 6 native SATA3 ports with superfast 6Gbps link speed and RAID 0, 1, 5, 10 support, Supports USB 3.0 with superfast transfer rates of up to 5 Gbps, GIGABYTE 3x USB Power with On/Off Charge USB ports, Ultra Durable 3 Technology with copper cooled quality for lower working temperature, Turbo XHD technology accelerating hard drive performance with ease, Revolution energy…
SpecPicks Verdict
SpecPicks scored GIGABYTE AMD 990FX + SB950 AM3+ SATA 6Gb/s USB 3.0 ATX AMD Motherboard using a rating × review-volume × price-fit model applied to published specs and reviews across the motherboards category. Compare with similarly-priced alternatives in the motherboards category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for motherboards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- CPU: AM3+/AM3/AMD Athlon II Chipsets: AMD 990FX/AMD SB950
- Memory: 4 x 1.5V DDR3 DIMM sockets supporting up to 32 GB of system memory, Dual channel memory architecture, DDR3 2000(O.C.)/1866/1600/1333/1066 MHz memory modules
- Audio: Realtek ALC889 codec , High Definition Audio, Dolby Home Theater, 2/4/5.1/7.1-channel, LAN: 10/100/1000 Mbit
- Expansion Slots: 2 x PCI Express x16 slot running at x16 ,1 x PCI Express x16 slot running at x8 ,2x PCI Express x4 slots, 1 x PCI Express x1 slot, 1 x PCI slots, Support for 2-Way/3-Way AMD CrossFireX and NVIDIA SLI technology
- Storage Interface: 6 x SATA 6Gb/s connectors , Support for SATA RAID 0, RAID 1, RAID 5,RAID 10 and JBOD,2x SATA 6Gb/s connectors,2 x eSATA 6Gb/s, Support for RAID 0 and RAID 1
- USB: Up to 14 USB 2.0/1.1 ports, Up to 4 USB 3.0/2.0 ports, Up to 2 IEEE 1394a ports
Full Specifications
| CPU | AM3+/AM3/AMD Athlon II Chipsets: AMD 990FX/AMD SB950 |
|---|---|
| USB | Up to 14 USB 2.0/1.1 ports, Up to 4 USB 3.0/2.0 ports, Up to 2 IEEE 1394a ports |
| Audio | Realtek ALC889 codec , High Definition Audio, Dolby Home Theater, 2/4/5.1/7.1-channel, LAN: 10/100/1000 Mbit |
| Brand | GIGABYTE |
| USB 2.0 | 8 |
| Platform | Windows |
| CPU Model | FX 8-Core |
| CPU Socket | Socket AM3 |
| Model Name | GA-990FXA-UD5 (rev. 3.0) |
| Unit Count | 1.0 Count |
| Chipset Type | AMD 990FX |
| Connectivity | USB |
| Model Number | GA-990FXA-UD5 |
| Chipset Family | AMD 990 series |
| Mfr Part Number | GA-990FXA-UD5 |
| Number of Ports | 18 |
| Total Usb Ports | 14 |
| Item Part Number | GA-990FXA-UD5, GA990FXAUD5 |
| Processor Socket | Socket AM3 |
| Total PCIe Ports | 5 |
Ready to buy?
Amazon shows no buyable offer for GIGABYTE AMD 990FX + SB950 AM3+ SATA 6Gb/s USB… at the last check. A similar in-stock product is GIGABYTE B460M DS3H V2. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
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