AMD Motherboards - FM2A88X+ infinity killer ethernet slow LAN speed

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FM2A88X+ infinity killer ethernet slow LAN speed

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=17315
Printed Date: 14 Aug 2025 at 5:15am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: FM2A88X+ infinity killer ethernet slow LAN speed

Posted By: patof
Subject: FM2A88X+ infinity killer ethernet slow LAN speed
Date Posted: 23 Nov 2020 at 11:35pm

Hi,

I had major LAN issues with on board ethernet on this board.

Transfers to / from the LAN were occurring at a slow speed of 12-25 kBps. Internet speeds were fine.

I checked from another computer with a 10Mbps ethernet card and transfers were normal at 12Mbps. So the problem was not the file server, it was the asrock computer.

After trying a PCI network card for diags - which worked OK - I decided to do a little research before ordering a new gigabyte PCI card.

I landed on https://support.killernetworking.com/knowledge-base/optimizing-e2200-e2400-e2500-advanced-driver-settings/ which enumerates the recommended settings for the on board ethernet. Mostly all of them were wrong on my newly installed Asrock board (I got it 3 days ago). After settings each one as recommended, LAN transfers were finally optimal at 112MBps.

Removed Killer manager and filters after playing with them for a while. Useless. I have a internet fiber 50/50 MBps link.

Hope this will help s/o else in my situation, hence this posting. I've searched a lot before finding the killernetworking link.

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FM2A88X+ Infinity Killer
BIOS P2.90
AMD A10-7850K
Killer e2200 Gigabit Ethernet Controller
CT500MX5 00SSD1 SATA Disk Device (SSD)
HL-DT-ST DVD-RAM GSA-H55L IDE CdRom Device (with IDE to SATA adaptor)
Windows 7 SP1 Ultimate