The AMD 3400G uses many PCI-E lanes. This could be excessive depending on your system's needs.
The AMD 3400G uses many PCI-E lanes. This could be excessive depending on your system's needs.
I own a 3400G in a Gigabyte Aorus Pro WiFi I (ITX). Initially I had the CPU and was moving toward a dedicated GPU. I acquired a 2060 KO and am questioning if the APU is limiting its performance. According to my research so far, the 3400G supports 24 lanes, with 4 assigned to the chipset and another 4 to the GPU portion of the APU, leaving 16 lanes for a dedicated GPU. I also have an M.2 slot on the motherboard and three SATA drives. The calculations seem correct based on that arrangement. Regarding NVMe, does it draw lanes directly from the CPU or is it managed through the chipset? The SSD lanes follow the chipset allocation. If NVMe uses CPU lanes, would that reduce the available lanes for the GPU? GamersNexus tested reducing GPU lanes from 16 to 8 and found no significant effect on gaming performance. I’m experimenting with Blender and wondering if this affects rendering speed noticeably. If it does, upgrading to a 2700x might be a budget-friendly option to increase cores and free up lanes.
The CPU configuration includes 8+8+4+4 components. Four slots are reserved for the chipset, four are dedicated to NVMe storage, eight go to the GPU, and another eight for the graphics card. It doesn't make much sense to claim a total of 24 since not all channels can serve the same purpose. NVMe lanes cannot be assigned to the GPU or other PCIe devices, and attempting a triple-graphics setup would fail because the NVMe and chipset lanes are restricted from being used for graphics.
Ryzen CPUs feature 24 lanes, with 16 dedicated to the GPU, 4 reserved for NVMe (or alternatively 2 SATA) and another 4 for the chipset. The G-series APUs offer 16 lanes overall: 8 for the GPU, 4 for dedicated NVMe (or similarly 2 SATA) and 4 for the chipset. The internal iGPU consumes no external resources. The chipset supports its own connections, including certain PCIe 2.0 lanes and SATA ports. A GPU equipped with 8 PCIe 3.0 lanes will function perfectly.
Does the 3400g fit two M.2 SSDs? I’m having trouble getting both to work with APU and a Wi-Fi card.
The 3400G accommodates several M.2 drives. One will link to the CPU lanes while another connects to the chipset. Are you utilizing just the two SSDs and the Wi-Fi card? If your Wi-Fi card is in the top PCIe slot, it will connect to the CPU and the second M.2 slot to the chipset. When it's in a secondary PCIe slot, it goes to the chipset as well.
I attempted to place the Wi-Fi card in two different locations, but it didn’t resolve the issue. Here’s a summary of your current setup: 3400g with the Asus B450-F (first model), 16GB of crucial RAM, a wireless Wi-Fi card, a Samsung 128GB M.2 SSD, a silicon 512GB M.2 SSD, and a 1TB hard drive.
It seems one of your gadgets might not be functioning properly.