DR-4000 NVRAM

Hi

my DR4000 fails because NVRAM have a damage, the part number of NVRAM its 4KP8H Dell Marvell PCI-E HA1CA22640FH-RA1V35. its very difficult found this part, but i found a similary part: Dell / Marvell Full Height 8GB Write Acceleration Card - H9DXY

Is compatible this part whit dr4000?