luka wrote on 2026-01-08, 21:40:

Need DZ77BH-55K BIOS files 0057→0070→0099→0100 […]
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Need DZ77BH-55K BIOS files 0057→0070→0099→0100

Hey guys!
Desperately need BIOS update files for Intel DZ77BH-55K.
Current version: BHZ7710H.86A.0057 (Feb 2012). Direct flash to 0100 failed (DualBIOS rollback).

Need intermediate versions for safe step-by-step upgrade:
- BHZ7710H.86A.0070.BI.ZIP (or .BIO)
- BHZ7710H.86A.0099.BI.ZIP (or .BIO)
- BHZ7710H.86A.0100.BI.ZIP (final, have but fails)

Goal: Intel Arc B580 compatibility (ReBAR/PCIe). Rebyte.me down, official Intel links dead.

Can anyone share via Google Drive/Mega/attachment? Have clean FAT32 USB + IFLASH2 ready.

THANKS in advance! 🔥

Did 0100 fail by standard update (0057 > 0100) or the BIOS Recovery Method... https://web.archive.org/web/20210801083418/ht … 55K/td-p/700767

Found BHZ7710H.86A.0099 here and verified it downloaded and unzipped to verify contents:
https://drivers.softpedia.com/get/BIOS/Intel/ … .shtml#download

Click on the link under FILENAME:

PC Hoarder Patrol wrote on 2026-01-08, 23:46:

luka wrote on 2026-01-08, 21:40:

Need DZ77BH-55K BIOS files 0057→0070→0099→0100 […]
Show full quote

Need DZ77BH-55K BIOS files 0057→0070→0099→0100

Hey guys!
Desperately need BIOS update files for Intel DZ77BH-55K.
Current version: BHZ7710H.86A.0057 (Feb 2012). Direct flash to 0100 failed (DualBIOS rollback).

Need intermediate versions for safe step-by-step upgrade:
- BHZ7710H.86A.0070.BI.ZIP (or .BIO)
- BHZ7710H.86A.0099.BI.ZIP (or .BIO)
- BHZ7710H.86A.0100.BI.ZIP (final, have but fails)

Goal: Intel Arc B580 compatibility (ReBAR/PCIe). Rebyte.me down, official Intel links dead.

Can anyone share via Google Drive/Mega/attachment? Have clean FAT32 USB + IFLASH2 ready.

THANKS in advance! 🔥

Did 0100 fail by standard update (0057 > 0100) or the BIOS Recovery Method... https://web.archive.org/web/20210801083418/ht … 55K/td-p/700767

Standard BIOS menu update 0057→0100 hung midway. CMOS reset needed. No recovery jumper used.
Thank you for a link!

cyclone3d wrote on 2026-01-09, 00:11:

Found BHZ7710H.86A.0099 here and verified it downloaded and unzipped to verify contents:
https://drivers.softpedia.com/get/BIOS/Intel/ … .shtml#download

Click on the link under FILENAME:

Thank You much!!!

Guys, i ve found on this forum link to FTP server with old drivers.
ftp://ftp.micro-square.nl/Drivers/Mainboard/= … 055K/BIOS/0100/
I ve found there folder with DZ77BH-55K
and there re 2 folders in it: 0100 with BH0100.bio + iflash exe and second folder named 0100msq with one file 0100msq.bio
Which is right and safe?

second moment, i have link that you gave me

Found BHZ7710H.86A.0099 here and verified it downloaded and unzipped to verify contents:
https://drivers.softpedia.com/get/BIOS/Intel/ … .shtml#download
Click on the link under FILENAME:

there is a Intel DZ77BH-55K

Express BIOS

0099 and also i ve found on this site 099 iFLASH versions and other. But i cant download any driver. Button download dont works(

TRIED HARDWARE RECOVERY (official Intel method):

BH099.BIO (extracted from Intel-DZ77BH-55K-Iflash-BIOS-0099)
- Verbatim USB 2.0 (black rear port #2)
- FAT32 (full format, not quick)
- BIOS_CONFIG jumper **COMPLETELY REMOVED** (per Intel manual)

2. BH0100.BIO (same process, port #1)

**WHAT HAPPENED (both attempts):
1:24 AM — Power on → cycles OFF/ON → stays ON ✓
1:25 AM — POST 60 (USB init) ✓
1:25-1:42 — Rhythmic LED blinking + periodic HDD-like crackling
(crackling stopped ~1:36, then 2-3 final louder cracks at 1:42)
1:42 — Manual power off (18+ min total)
Jumper back to 1-2 → → BIOS still 0057

**BIOS Behavior After:**
- CPU 40°C → **Fans go 2000 RPM immediately** (Control Mode AUTO/MANUAL)
- GTX 560 works fine, PCIe alive
- Windows 10 loads normally

QUESTION:
1. **Why POST 60 + crackling 18min = NO BIOS update?**
2. **Correct .BIO filename?** (BH099.BIO vs BHZ7710H.86A.0099.BIO?)
3. **USB port issue?** Tried 2/3 black USB 2.0 ports
4. **Try iFlash DOS method?** (IFLASH.EXE + .BIO on FreeDOS USB)
5. **Arc B580 will work on BIOS 0057?** (PCIe 2.0 x16)

**Files used:**
- [BH099.BIO](link) ~8MB
- [BH0100.BIO](link) ~11MB
- Both from official Intel iflash packages

**NEXT STEPS?** DDU NVIDIA → Arc B580 test? Or one more BIOS attempt?

Thanks for any advice! 2+ hours of recovery attempts...