Si tu as un port pci express sur ta carte mère, la cg est compatible.
Et suivant les spécifications de ta cm trouvé sur le net:
hewlett-packard 3647h mainboard specs
Hewlett-Packard 3647h Motherboard Specifications.
CPU
Socket LGA 775 – Intel Core 2 Quad, Core 2 Duo, Pentium Dual Core, Celeron Dual Core
Chipset
North Bridge – Intel Q45
South Bridge – Intel ICH10
Integrated Graphics
Intel GMA 4500
FSB
1333/1066/800 MHz
Expansion Slots
1 x PCI Express x16 (running at x4)
1 x PCI Express x16
1 x PCI Express x1
3 x PCI
Storage
5 x SATAII 3Gb/s connectors
Supports HDDs, Internal Solid State Drive (SSD)
Audio
Realtek ALC261 – High Definition
Ethernet
Intel 82567LM – (Gigabit)
Memory
4 x 240-pin DDR3 DIMM slots Supports DDR3 1333/1066 MHz non-ECC, un-buffered memory (Max 16GB)
Rear Panel
1 x RJ45 LAN port
6 x USB 2.0 ports
1 x Serial port
1 x Audio I/O
1 x VGA port
1 x Display port
1 x PS/2 green for mouse
1 x PS/2 purple for keyboard
Internal
2 x USB headers
1 x Power connector
1 x Clear CMOS
1 x Battery socket (3V)
1 x 4-pin CPU Fan connector
1 x 3-pin SYS Rear Fan connector
1 x 4-pin ATX Power connector
1 x Front Audio header
1 x Front Panel header
Form Factor
ATX
Tu as bien des ports pci-express compatible.
Donc oui.
Bat