Name: Radeon R7 340X OEM
Note: No deletion; It's a valid Subvendor-ID; See https://www.techpowerup.com/gpu-specs/radeon-r7-340-oem.c2946
Don't delete. Valid SubvendorID, it's the 'R7 340X OEM' issued for DELL (see TPU-link in note).
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 (AMD6610.1);
-> Revision 81 of DeviceID got this very SubvendorID (PCI\VEN_1002&DEV_6610&SUBSYS_00831028&REV_83)
-> Line 122 + 957 show that given SubvendorID for Dell;
-> Line 8685 designates it as "AMD Radeon(TM) R7 340X"
If AMD's own records ain't valid enough, I don't know what they are.
Dev id in validation
Name: Radeon R5 340X OEM
Nice finding! Even the Revision-ID corresponds to the AMD driver-string found within their *.inf;
1. "%AMD6610.2%" = ati2mtag_R501, PCI\VEN_1002&DEV_6610&SUBSYS_00831028&REV_83
2. AMD6610.2 = "AMD Radeon(TM) R5 340X"