ATI Radeon HD3650
ffdshow (the one comes with CCCP 2010-10 AND the latest from Free-codecs site)
Catalyst 10.12
Latest DirectX, Windows 7 HP x64

If I try to play it simply, the player (mpc-hc) won't use the acceleration. If I disable checks, I get artifacts. Back then it worked perfectly with my Intel and ATI too (Lenovo ThinkPad T500, switchable graphics). This only appeared recently.

What should I do? What am I missing?
If possible, I don't really want to downgrade drivers (waaa ATI drivers s.ck ... sorry but.. honestly), because the older one got a buggy DP driver so my external display gets a totally wrong resolution.

Info about the media file:
Video:

Format : AVC Format/Info : Advanced Video Codec Format profile
: [email protected] Codec ID
: V_MPEG4/ISO/AVC Writing library
: x264 core 88 r1462 7fcffde Encoding settings : cabac=1 / ref=8 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=8 / psy=1 / psy_rd=0.80:0.20 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-3 / threads=3 / sliced_threads=0 / nr=0 / decimate=1 / mbaff=0 / constrained_intra=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / wpredb=1 / wpredp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=16.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00

The sample file I'm testing at the moment:
[Coalgirls]_Kiddy_Girl-and_01_(1920x1080_Blu-Ray_FLAC)_[91428679].mkv
(I tried many x264 files, no use.)

Artifacts