Gigabyte Z390 D Motherboard vs Gigabyte GA-Z270X-UD3
Buy the Z390 D for a new build or any 8th/9th-gen Core CPU, and buy the GA-Z270X-UD3 only if you already own a 6th/7th-gen chip or find it clearly cheaper. The Z390 D is $82.00 at Newegg.com as of November 7, 2026, and has ranged from $82.00 to $99.23 since November 2. The Z270X-UD3 is the older board: it caps at 64 GB RAM and its platform is two generations behind.
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Gigabyte Z390 D Motherboard
Gigabyte Z390 D LGA 1151 ATX Motherboard
Choose the Z390 D if you are building with an 8th- or 9th-gen Intel CPU and want 128 GB RAM support, HDMI plus VGA output, and the newer chipset.
Pros
- Supports 8th and 9th-gen Intel Core CPUs on LGA1151
- 128 GB max RAM, double the Z270X-UD3
- HDMI and VGA outputs for display flexibility
- $82.00 at Newegg.com as of November 7, 2026, near its recent low
What separates them
| Gigabyte Z390 D Motherboard | Gigabyte GA-Z270X-UD3 | |
|---|---|---|
| Chipset generation | Intel Z390, supports 8th and 9th-gen Core | Intel Z270, supports 6th and 7th-gen Core |
| Maximum RAM | 128 GB across 4 slots | 64 GB across 4 slots |
| Multi-GPU | CrossFire only | SLI and CrossFire |
| Video outputs | HDMI and VGA | HDMI only |
| Audio codec | Not specified in the listing | Realtek ALC1220 |
| LAN | Ethernet port listed, chip not specified | Intel GbE (10/100/1000 Mbit) |
| SATA ports | Not specified in the listing | 6 x SATA 6Gb/s |
Price history
$100.96$82.00
- Gigabyte Z390 D Motherboard: lowest $82.00 on Nov 6 at Newegg.com.
- Gigabyte GA-Z270X-UD3: lowest $100.96 on Nov 2 at Amazon.
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Gigabyte GA-Z270X-UD3
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Specs compared
| Spec | Gigabyte Z390 D Motherboard | Gigabyte GA-Z270X-UD3 |
|---|---|---|
| Form Factor | ATX | ATX |
| Socket Type | Socket LGA1151 | Socket LGA1151 |
| RAM Type | DDR4 | DDR4 |
| Expansion Slot | PCI Express | PCI Express |
| ECC Support | Yes | Yes |
| Chipset | Intel | Intel |
| External Ports | Ethernet, VGA, HDMI, USB | Ethernet, HDMI, USB |
| Gaming | Yes | Yes |
| Multiple GPU Support | Crossfire | SLI, Crossfire |
| Number Of Memory Slots | 4 Memory Slots | 4 Memory Slots |
Questions and answers
- Which board is better for a new build?
- The Z390 D. It takes 8th and 9th-gen Intel CPUs and supports up to 128 GB of RAM, while the Z270X-UD3 stops at 6th/7th-gen chips and 64 GB.
- Can I use the same CPU in both?
- No. Both use LGA1151, but the Z390 D runs 8th/9th-gen Core and the Z270X-UD3 runs 6th/7th-gen Core. Check your chip before buying.
- Is the Z390 D worth the extra?
- At $82.00 at Newegg.com as of November 7, 2026, it is the cheaper known option and the newer platform. The Z270X-UD3 only makes sense if you already own a compatible older CPU.
- Which has better audio and networking?
- The GA-Z270X-UD3 lists a Realtek ALC1220 codec and Intel GbE LAN. The Z390 D listing names only an Ethernet port and does not specify the chip or codec.
- Which supports more graphics cards?
- The Z270X-UD3 supports both SLI and CrossFire. The Z390 D lists CrossFire only.
- How much RAM can each take?
- The Z390 D takes up to 128 GB in 4 slots. The GA-Z270X-UD3 takes up to 64 GB in 4 slots.
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