<html><head><meta http-equiv="content-type" content="text/html; charset=GB2312"><style>body { line-height: 1.5; }body { font-size: 12pt; font-family: 微软雅黑; color: rgb(0, 0, 0); line-height: 1.5; }</style></head><body> <div><span></span>Hi guys:</div><div> I was passthrough my GTX 970 on a win7_x64 and it works fine.The host is running a Fedora 23 Workstation.</div><div><br></div><div><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);"> I use virt-manager 1.3.2 to create the VM,The version of Libvirt is 1.2.18,QEMU version is 2.4.1.</span></div><div><br></div><div><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);"> But when I run the 3Dmark 11 to confirm the function and performance,I found that the physx function didn't work.</span></div><div><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);"><br></span></div><div><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);"> Aslo i found that the display tab in the "dxdiag" command shows me the video memory is just 679MB,and the GTX 970 have 4096MB.</span></div><div><span style="background-color: rgba(0, 0, 0, 0); font-size: 12pt; line-height: 1.5;"> </span></div><div><span style="background-color: rgba(0, 0, 0, 0); font-size: 12pt; line-height: 1.5;"> Can anyone tell me where is wrong?</span></div><div><span style="background-color: rgba(0, 0, 0, 0); font-size: 12pt; line-height: 1.5;"><br></span></div><div><span style="background-color: rgba(0, 0, 0, 0); font-size: 12pt; line-height: 1.5;"><br></span></div><div><span style="background-color: rgba(0, 0, 0, 0); font-size: 12pt; line-height: 1.5;"> </span><span style="background-color: rgba(0, 0, 0, 0); font-size: 12pt; line-height: 1.5;"> here is my qemu startup log:</span></div><div><span style="background-color: rgba(0, 0, 0, 0); font-size: 12pt; line-height: 1.5;"><br></span></div><div><span style="background-color: rgba(0, 0, 0, 0); font-size: 12pt; line-height: 1.5;">starting up libvirt version: 1.2.18.2, package: 2.fc23 (Fedora Project, 2016-01-21-00:54:13, buildhw-01-nfs.phx2.fedoraproject.org), qemu version: 2.4.1 (qemu-2.4.1-7.fc23)</span></div><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);">LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-kvm -name win7 -S -machine pc-i440fx-2.4,accel=kvm,usb=off,vmport=off -cpu SandyBridge,+erms,+smep,+fsgsbase,+pdpe1gb,+rdrand,+f16c,+osxsave,+dca,+pcid,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff -m 2048 -realtime mlock=off -smp 1,maxcpus=2,sockets=1,cores=2,threads=1 -uuid a6f3edfd-39a7-450f-b557-9ddb459f9401 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/win7.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet -no-reboot -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x6.0x7 -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x6 -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x6.0x1 -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x6.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive file=/var/lib/libvirt/images/win7.qcow2,if=none,id=drive-virtio-disk0,format=qcow2 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive file=/soft/cn_windows_7_ultimate_with_sp1_x64_dvd_u_677408.iso,if=none,id=drive-ide0-0-1,readonly=on,format=raw -device ide-cd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1,bootindex=2 -drive file=/soft/virtio-win-0.1.102.iso,if=none,id=drive-ide0-1-0,readonly=on,format=raw -device ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0,bootindex=3 -netdev tap,fd=23,id=hostnet0,vhost=on,vhostfd=24 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:41:6e:bb,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -device usb-tablet,id=input0 -vnc 127.0.0.1:0 -device VGA,id=video0,vgamem_mb=16,bus=pci.0,addr=0x2 -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev spicevmc,id=charredir0,name=usbredir -device usb-redir,chardev=charredir0,id=redir0 -chardev spicevmc,id=charredir1,name=usbredir -device usb-redir,chardev=charredir1,id=redir1 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x8 -msg timestamp=on<br></span> </body></html>