The HardwareUnboxed portal is investigating a possible issue with the upcoming AMD Radeon card RX 6500 XT entry range that will go on sale in just 2 days. It is known that the graphics card Radeon RX 6500 XT It will have a PCIe Express interface limited to four lanes, and this is what could be causing problems in somewhat outdated systems.
The card is based on the fourth generation of PCI Express, which means that four lanes should provide as much bandwidth as eight lanes in the Gen3 standard. Given that the AMD Radeon RX 6500XT it's sold as a budget option and likely many who will buy it will be users with a long-overdue system upgrade, chances are that many users considering this card will still have a PCIe Gen3 motherboard. And here is where a factory design flaw would lie as reported.
The AMD Radeon RTX 6500 XT does not play well on older systems
Note that HardwareUnboxed cannot yet publish the results of its tests with the RX 6500 XT due to embargo on reviews. But they can use older generation models like the GPU-based Radeon RX 5500 XT Navi 24 to see if there are any performance bottlenecks coming from the Gen3 interface.
As the reviewer points out, bandwidth issues are more likely to occur on 4GB cards, rather than 8GB, simply because some resources will be stored in video memory, rather than constantly being pulled from system memory or storage. The RX 5500 XT was available in two variants, with 8GB or 4GB of memory, making it the perfect candidate card for this type of testing.
If this is confirmed, it would be bad news for those who took advantage of the announcement of this affordable graphics card to start improving their system. Of course they could improve it, but it would also imply looking for a larger motherboard and for it, the necessary RAM and CPU if it is worth it.
Source: Videocardz
