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Slow Ethernet Speeds on Asus Router

Slow Ethernet Speeds on Asus Router

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Gabokazu
Posting Freak
814
11-16-2025, 06:08 PM
#1
Hello everyone, I'm facing some problems with my Asus RT-AC1750 Router. I have fiber optic internet at 1 Gbps, but when I connect via a direct connection, the speeds drop significantly—around 900 Mbps down and up. The issue becomes noticeable when I bridge my modem to the router and link it directly to my computer using a Cat 6 cable; I only get about 500 Mbps down and 300 Mbps up. I've tried several solutions: enabling jumbo frames in the router, switching cables (one CAT 5e, one CAT 6), turning NAT acceleration on/off, adjusting firewall settings, setting speed to full duplex at 1 Gbps, updating firmware, and resetting all settings. I've also mentioned other attempts but didn't include them here. Since it's a 1GB router, the speeds are consistently lower when connected directly. Appreciate any advice you can offer.
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Gabokazu
11-16-2025, 06:08 PM #1

Hello everyone, I'm facing some problems with my Asus RT-AC1750 Router. I have fiber optic internet at 1 Gbps, but when I connect via a direct connection, the speeds drop significantly—around 900 Mbps down and up. The issue becomes noticeable when I bridge my modem to the router and link it directly to my computer using a Cat 6 cable; I only get about 500 Mbps down and 300 Mbps up. I've tried several solutions: enabling jumbo frames in the router, switching cables (one CAT 5e, one CAT 6), turning NAT acceleration on/off, adjusting firewall settings, setting speed to full duplex at 1 Gbps, updating firmware, and resetting all settings. I've also mentioned other attempts but didn't include them here. Since it's a 1GB router, the speeds are consistently lower when connected directly. Appreciate any advice you can offer.

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eth_mine
Member
53
11-16-2025, 06:08 PM
#2
No known consumer routers support Gigabit speeds. When manufacturers claim Gigabit capability, it usually refers to combined WiFi performance, not actual broadband internet speed.
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eth_mine
11-16-2025, 06:08 PM #2

No known consumer routers support Gigabit speeds. When manufacturers claim Gigabit capability, it usually refers to combined WiFi performance, not actual broadband internet speed.

X
163
11-16-2025, 06:08 PM
#3
The quote refers to Gigabit Ethernet ports designed for swift and dependable internet speed.
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XExtremeGamerX
11-16-2025, 06:08 PM #3

The quote refers to Gigabit Ethernet ports designed for swift and dependable internet speed.

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lila_lau
Junior Member
42
11-16-2025, 06:08 PM
#4
The Asus routers labeled AC-1750 generally handle 800Mbps to 900Mbps LAN to WAN speeds, though the RT-AC1750 model isn’t commonly referenced.
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lila_lau
11-16-2025, 06:08 PM #4

The Asus routers labeled AC-1750 generally handle 800Mbps to 900Mbps LAN to WAN speeds, though the RT-AC1750 model isn’t commonly referenced.

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Flabalicious
Junior Member
24
11-16-2025, 06:08 PM
#5
No, I haven't checked the settings for performance counters.
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Flabalicious
11-16-2025, 06:08 PM #5

No, I haven't checked the settings for performance counters.

B
benice45
Member
230
11-16-2025, 06:08 PM
#6
Visit the official ASUS website for networking solutions.
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benice45
11-16-2025, 06:08 PM #6

Visit the official ASUS website for networking solutions.

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HairyWiener
Member
160
11-16-2025, 06:08 PM
#7
Similar to CPU and RAM monitors, these tools track system performance and resource usage.
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HairyWiener
11-16-2025, 06:08 PM #7

Similar to CPU and RAM monitors, these tools track system performance and resource usage.

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Goldentortu
Member
55
11-16-2025, 06:08 PM
#8
You're checking various models for LAN to WAN speeds, aiming for something around 850Mbps or higher. Are you using speed tests or comparing different brands?
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Goldentortu
11-16-2025, 06:08 PM #8

You're checking various models for LAN to WAN speeds, aiming for something around 850Mbps or higher. Are you using speed tests or comparing different brands?

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ItsLuckySG
Junior Member
46
11-16-2025, 06:08 PM
#9
Speedtest.net for Windows 7 provides identical outcomes as the web browser.
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ItsLuckySG
11-16-2025, 06:08 PM #9

Speedtest.net for Windows 7 provides identical outcomes as the web browser.

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Xythorn
Member
66
11-16-2025, 06:08 PM
#10
Jumbo frames might interfere with broadband performance, especially since internet speeds are capped around 1500 Mbps.
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Xythorn
11-16-2025, 06:08 PM #10

Jumbo frames might interfere with broadband performance, especially since internet speeds are capped around 1500 Mbps.

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