My PC has been unreliable for a while and has already had both the CPU and motherboard replaced. The original problems seemed related to an older Intel 9th-generation CPU, but I'm still experiencing frequent crashes. The repair shop believes the RTX 4090 may now be failing. They reportedly tested the card in another system and saw crashes and visual artifacting, while installing a different GPU in my PC seemed to make it run normally. My current system has an Intel i9-14900K, an MSI RTX 4090 24GB, 32GB of DDR4 memory, and a 1000W power supply. If the 4090 really needs to be replaced, what would be a sensible option that avoids the extreme top-end pricing without being a huge performance downgrade?
2 Answers
Before replacing the card, make sure the motherboard has a current BIOS and check the power connections carefully. A 1000W supply should generally be enough for this hardware, but a defective or aging PSU can still cause crashes, especially under GPU load. Since you also crash while idle, that doesn’t rule out the PSU, but it makes the situation less straightforward. If possible, testing with a known-good PSU would be worthwhile.
I’d verify the diagnosis one more time before spending that kind of money. If the shop saw artifacting from the 4090 in a separate test system and your computer behaves normally with another GPU, that’s pretty strong evidence the card is failing. It would still be useful to test the integrated graphics by removing or disabling the dedicated card, just to rule out another issue completely. As for replacements, the RTX 5090 is the only clear step up but is extremely expensive. An RTX 5080 would be somewhat slower than your 4090, while an RTX 5070 Ti or Radeon RX 9070 XT would cost less but represent a more noticeable downgrade.
The BIOS is something I’ve kept updated because of the earlier CPU stability concerns. The PSU is 1000W, and the crashes have happened while idle as well as during use, so I wasn’t sure whether the power supply could still be responsible.