Boosting bus velocity while encountering an error
Boosting bus velocity while encountering an error
I recently changed my GPU from R7 250 to RX 550. Prior to the upgrade, I increased my bus speed from 100MHz to 110MHz (without an unlocked CPU), and everything functioned properly. After installing a new GPU, I applied the same BIOS settings but encountered boot issues, receiving a long beep followed by three short beeps—a clear GPU error. Any assistance would be appreciated.
Imagine the pc as a city. There are many structures—houses, shops, gyms, parks, town halls—all connected by roads. The PCI bus is like that road network. Usually, these roads have speed limits, such as 30mph, and everyone knows them. But in this town, the limit was raised to 40mph, which was fine for everyone.
Then a newcomer arrives, tries to move around at 30mph, and you're shocked when they get rear-ended because of the change.
The Rx series don't tolerate unusual bus speeds. They're used to high-speed connections (100MHz), and altering the speed limits affects how fast data travels inside the GPU.
It could also be a BIOS issue. The Rx series are famous for rejecting older BIOS versions, sometimes only accepting newer ones.
don't raise the bus speed. consider using a more suitable PSU.
Imagine the pc as a city with various structures like buildings, shops, gyms, parks, and town halls. All these elements are linked by roads, which act like the pcie buss. Usually, these roads follow speed limits—like 30mph—and everyone is familiar with them. But in this scenario, the limit was raised to 40mph, which was considered fine.
Then a newcomer arrives and tries to move around at the usual 30mph, only to be surprised when they get rear-ended by someone driving faster.
The Rx series are sensitive to unusual buss settings. They expect a high-speed connection—around 100MHz—and any change in speed limits affects how fast data travels inside the graphics card.
It could also be related to the bios. The Rx series generally dislike older bios, and some may only work with UEFI versions. Check the card closely; there might be a small physical switch that enables compatibility with legacy bios.
Overclocking combined with a faulty power supply is one of my go-to disaster pairings that never loses its appeal. Go back everything to the original settings and avoid pushing it further. If the card has an auxiliary connector, it might be time to replace the PSU—it could be near its end. For those cheaper silver models, expect around 300W rather than 550W, since most of the power ends up on unused rails, especially in designs from the early 2000s.