Name: R5 430 OEM (2048 MByte)
Note: The 'AMD Radeon R5 430' instead of 240/340 is NOT a typo! It's actually correct.
Valid SubvendorID, it's the 'R5 430 OEM' issued for DELL (see TPU-link for SubvendorID; https://www.techpowerup.com/vgabios/221232/221232).
According to AMD's own words. See AMD's most recent drivers;
Unpack (or open with 7zip) -> Packages\Drivers\Display\W76A_INF -> see .\C7361133.inf for vendor-strings (AMD6611.1/.2);
-> Revision 00 of DeviceID 6611 got this very SubvendorID (PCI\VEN_1002&DEV_6611&SUBSYS_17111028&REV_00, PCI\VEN_1002&DEV_6611&SUBSYS_17111028&REV_87)
-> Line 139/140 + 974/975 show that given SubvendorID for Dell;
-> Line 8702/8703 designates boths revisions (00, 87) as "AMD Radeon R5 430"
TPU database-link for "Radeon R5 430 OEM"; https://www.techpowerup.com/gpu-specs/radeon-r5-430-oem.c2893
If AMD's own records ain't valid enough, I don't know what is.