ATI cards can not support some games well. Especially 38xx series. Further more, the PCIE card and the motherboard are not compatible, the situation gets worse.
1. you can upgrade your BIOS version, if you insist other version bios can adjust Vcore voltage;
2. You also can find a PWM datasheet and adjust your motherboard VIDs, that can change the Vcore too.
You must have used a high level adapter. For example, IBM adapter is 16V, but some other adapter, such as HP adapter is 19V, if you use HP adapter on IBM notebook, that 's terrify...
You should buy a motherboard debug card and find out where your PC stopped.
PS: when you take the motherboard to your dealer, you should take all part of
yours. include the box. in my opinion, the chipsets of your motherboard may be
Inveracious Soldering.
Intel ESB2 (6321ESB) I/O controller can support 2 64bit/133MHz PCI-X channel. ESB2 chip connects MCH with 2GB/s BW ESI bus. except ESI bus, one adding x8 PCI-Express will be used for communication too.