Hello everyone! I have had this issue for close to a year now, and I can’t figure out what else to try.

When I go to install a game, I get the issue shown on the attached image. The download speed starts great, but then it cuts to 0 every five seconds. And it almost never goes back up to the speed it started at. Steam is the main offender, but I have experienced it on Epic Games, Ubisoft, & EA as well. The one time I don’t experience it is when I install League of Legends. Throughout this past year I have tried the following:

1. Clear download cache in Steam.
2. Limit download speed in Steam.
3. Flush & Renew DNS in Windows.
4. Re-install Windows twice.
5. Upgrade to Windows 11 Pro.
6. Update all drivers, firmware, & BIOS.
7. Change “Speed & Duplex” value to “1.6Gbps Full Duplex” for my LAN Driver in Device manager since I have 1GB Download & Upload Fiber Optic Internet.
8. Change the X.M.P. Profile in my BIOS settings to the default profile for my RAM instead of having it disabled.
9. Got a new motherboard.
10. Got a new Processor.
11. Got a new Graphics Card.
12. Got a m.2 Hard drive & installed Windows 11 Pro on it.
13. Switched to Cat6 Ethernet Cables.
14. And probably more.

At this point I’m at a loss on what more I can do. I’m hoping you guys will have some suggestions for more things I can try. The one thing I haven’t replaced is the CPU Cooler & RAM. It’s a liquid cooler that came with the case (since the computer was technically a pre-built before I replaced almost every part in it over time). But I don’t think it’s that because the temperatures for the CPU are between 27 & 41 Celsius while installing a game. Below is my current system specs. Thank you!

https://imgur.com/a/bsp60NK

OS: Windows 11 Pro

Motherboard: ASUSTek Prime Z690-P WIFI D4

Processor: 12th Gen Intel® Core™ i7-12700K, 3600 Mhz, 12 Core(s), 20 Logical Processor(s)

Graphics Card: TUF Gaming NVIDIA GeForce RTX 3070 Ti

RAM: Corsair CMK32GX4M2A2666C16 Vengeance LPX 32GB (2x16GB) DDR4 DRAM 2666MHz (PC4-21300) C16 Memory Kit

Hard drive Windows is installed on: Western Digital 1TB WD Blue SN570 NVMe Internal Solid State Drive SSD - Gen3 x4 PCIe 8Gb/s, M.2 2280, Up to 3,500 MB/s - WDS100T3B0C

Extra Hard drive #1: Samsung 860 QVO 1TB Solid State Drive (MZ-76Q1T0) V-NAND, SATA 6Gb/s, Quality and Value Optimized SSD

Extra Hard drive #2: Seagate 4TB BarraCuda SATA 6Gb/s 256MB Cache 3.5-Inch Internal Hard Drive (ST4000DM004)

EDIT:

Sorry, should’ve clarified. I have never installed games onto the HDD, the Seagate 4TB. I only install games on the M.2 SSD and sometimes on the Samsung SSD.