RX6600XT paired with i7 4790K delivers 4.8GHz performance with minimal demand on both systems.
RX6600XT paired with i7 4790K delivers 4.8GHz performance with minimal demand on both systems.
This CPU is nine generations old, exceeding ten years. You ran the RX 580 to its limits because it's significantly weaker than the 6600XT. The 6600XT throttles due to insufficient power delivery. An 8-lane configuration refers to the physical ports—each full slot holds 16, but only 8 lanes connect. The remaining slots aren't utilized. Lowering the generation reduces available connections (hardware or contact points), yet the total remains unchanged because it matches the existing count. This isn't related to how quickly data travels between generations. While 8th-gen 4 lanes and 16th-gen 3 lanes share similar bandwidth, a card with 8 lanes can't suddenly gain more capacity. You should have considered this before swapping the GPU.
Use the 1866MT/s pair, enable XMP, verify dual channel functionality, then launch your game to check for improvements.
Attempted before, my motherboard seems selective and only accepts all four slots for booting. Tested various RAM setups but nothing works. The BIOS loading is extremely slow—about 20 to 25 seconds from pressing the button until the beep and screen appear. Windows also struggles to start quickly, even with an M.2 SSD.
You should reset the CMOS when switching to a dual stick, though I'm not sure.