我想知道哪些显卡可以组成又显卡

***********双显卡需要主板的支持*********
组建双显卡就是实战组建SLI系统
要运行SLI就要组建支持SLI的平台，组建SLI系统，需要：1、支持SLI的主板；2、需要两张通过nVIDIA SLI认证的显卡；3、windows XP操作系统。

华硕 P5ND2-SLI是一款支持Geforce系列双显卡技术的C19芯片组主板，而且还是双PCI-E×16的配置。目前nVIDIO公司的主板芯片组研发能力以日臻完善，个人感觉在intel品台方面与intel芯片组的差距并不大，而且价格只售1000元左右确实非常超值。

NVIDIA认证SLI主板显卡列表

NVIDIA® SLI™ certification ensures a quality user experience by putting each SLI component through a series of tests. The testing process includes diagnostics, benchmarking, burn in, as well as card interoperability.

Only components that pass NVIDIA SLI certification can be called NVIDIA SLI READY. Be sure to look for the NVIDIA SLI READY logo when buying components for NVIDIA SLI systems.

CERTIFIED MOTHERBOARDS
NVIDIA nForce4 SLI:
Vendor Model Number
Asus A8N-SLI, A8N-SLI Deluxe
DFI Lanparty NF4-SLI-DR

Gigabyte GA-K8NXP-SLI
MSI K8N Diamond (K8N Neo4 Platinum/SLI)

CERTIF