4870 causing BSODs?

[Ohnoezfail]

Long story short, GPU died, using a backup 4870. I used driversweeper to remove all nvidia stuff and what not and installed the new ATI drivers from here
I'm on Windows 7 64-bit
http://support.amd.com/en-us/download/desktop/legacy?product=legacy2&os=Windows 7 - 64

The autodetect tool said that my GPU was some a-series crap so I just ignored that.

Now whenever I watch twitch for a bit, the player suddenly stops and it all goes green. Whenever I try to play it again I get a BSOD. I'll dump the latest one here.

VIDEO_SCHEDULER_INTERNAL_ERROR (119)
The video scheduler has detected that fatal violation has occurred. This resulted
in a condition that video scheduler can no longer progress. Any other values after
parameter 1 must be individually examined according to the subtype.
Arguments:
Arg1: 0000000000000001, The driver has reported an invalid fence ID.
Arg2: 000000000000d403
Arg3: 000000000000d405
Arg4: 000000000000d404

Debugging Details:
------------------


CUSTOMER_CRASH_COUNT: 1

DEFAULT_BUCKET_ID: WIN7_DRIVER_FAULT

BUGCHECK_STR: 0x119

PROCESS_NAME: firefox.exe

CURRENT_IRQL: b

ANALYSIS_VERSION: 6.3.9600.17029 (debuggers(dbg).140219-1702) amd64fre

LAST_CONTROL_TRANSFER: from fffff88001a2622f to fffff800030d3bc0

STACK_TEXT:
fffff880`0c3aa9e8 fffff880`01a2622f : 00000000`00000119 00000000`00000001 00000000`0000d403 00000000`0000d405 : nt!KeBugCheckEx
fffff880`0c3aa9f0 fffff880`077b2ec5 : 00000000`00000000 00000000`0000d403 00000000`00000000 00000000`0000d405 : watchdog!WdLogEvent5+0x11b
fffff880`0c3aaa40 fffff880`077b3131 : fffffa80`065da000 fffff880`0c3aab70 fffffa80`000011ac fffffa80`05e71940 : dxgmms1!VidSchiVerifyDriverReportedFenceId+0xad
fffff880`0c3aaa70 fffff880`077b2f82 : fffffa80`0000d403 00000000`00000001 fffffa80`063ff000 00000000`00000001 : dxgmms1!VidSchDdiNotifyInterruptWorker+0x19d
fffff880`0c3aaac0 fffff880`076ba13f : fffffa80`05004040 fffff880`0c3ab340 fffff880`0c3aac60 fffff800`030c5121 : dxgmms1!VidSchDdiNotifyInterrupt+0x9e
fffff880`0c3aaaf0 fffff880`0757b25f : 00000000`00000001 00000000`00000000 fffff880`0c3aabe0 d9e6b39c`d9e6b39c : dxgkrnl!DxgNotifyInterruptCB+0x83
fffff880`0c3aab20 00000000`00000001 : 00000000`00000000 fffff880`0c3aabe0 d9e6b39c`d9e6b39c 9c847ec4`4d202153 : atikmpag+0x625f
fffff880`0c3aab28 00000000`00000000 : fffff880`0c3aabe0 d9e6b39c`d9e6b39c 9c847ec4`4d202153 51898e81`614bd36a : 0x1


STACK_COMMAND: kb

FOLLOWUP_IP:
atikmpag+625f
fffff880`0757b25f ?? ???

SYMBOL_STACK_INDEX: 6

SYMBOL_NAME: atikmpag+625f

FOLLOWUP_NAME: MachineOwner

MODULE_NAME: atikmpag

IMAGE_NAME: atikmpag.sys

DEBUG_FLR_IMAGE_TIMESTAMP: 517f30ef

FAILURE_BUCKET_ID: X64_0x119_1_DRIVER_REPORTED_INVALID_FENCE_ID_atikmpag+625f

BUCKET_ID: X64_0x119_1_DRIVER_REPORTED_INVALID_FENCE_ID_atikmpag+625f

ANALYSIS_SOURCE: KM

FAILURE_ID_HASH_STRING: km:x64_0x119_1_driver_reported_invalid_fence_id_atikmpag+625f

FAILURE_ID_HASH: {51627f44-f980-241b-e546-bfaf496c36db}

Followup: MachineOwner

EDIT: Also perhaps worthy or note, whenever I boot up I get a message in Windows saying that the display driver is not running.. for some weird reason. Even though I installed everything correctly and I've actually done it multiple times :/