Linked below is a database of modified BIOSes for ASRock X58 motherboards patched with the latest microcode (0x1F for Westmere, 0x1D for Bloomfield) against Meltdown and all variants of Spectre. Make sure the operating system is also updated to be fully protected from speculative execution side-channel vulnerabilities (CVE-2017-5715, CVE-2017-5753, CVE-2017-5754).
While most of Nehalem CPUs received a new microcode from Intel, there is an early stepping (C0) that hasn't and therefore still vulnerable at the moment. However, these very few CPUs will also benefit from increased security and stability due to more recent microcode. In addition, the ROMs feature TRIM support for SSDs in RAID0 and extended CPU compatibility table for all motherboards.
Unofficial ROMs! use at your own risk. - http://www.mediafire.com/file/5zwpylb6czkgneb/X58DXMOD.zip/file" rel="nofollow - ASRock X58 Deluxe
- http://www.mediafire.com/file/ad63mnxegj8jb2f/X58DX3MOD.zip/file" rel="nofollow - ASRock X58 Deluxe3
- http://www.mediafire.com/file/ddlw8dzizl1jmp1/X58EXMOD.zip/file" rel="nofollow - ASRock X58 Extreme
- http://www.mediafire.com/file/dry7b6oz7fxi5yd/X58EX3MOD.zip/file" rel="nofollow - ASRock X58 Extreme3
- http://www.mediafire.com/file/xpzd9wa7xurhtxa/X58EX6MOD.zip/file" rel="nofollow - ASRock X58 Extreme6
- http://www.mediafire.com/file/wke9sob2l3dnj24/X58SCMOD.zip/file" rel="nofollow - ASRock X58 SuperComputer
Other useful downloads
- https://www.ngohq.com/intel-microcode-boot-loader.html" rel="nofollow - Intel Microcode Boot Loader (alternative method to update microcode in case your motherboard isn't listed)
- http://www.mediafire.com/file/kvbc656ixta4ecz/FeatureSettingsOverride.zip/file" rel="nofollow - Enable/Disable Meltdown and Spectre Protections (try this if the system appears vulnerable after flashing patched ROM)
- https://www.grc.com/files/InSpectre.exe" rel="nofollow - GRC's InSpectre
- https://rufus.akeo.ie/downloads/rufus-3.1p.exe" rel="nofollow - Rufus 3.1 Portable (to create bootable USB flash drive with DOS)
- http://www.mediafire.com/file/9yrh0l3by5837u8/infinst_autol.exe/file" rel="nofollow - Intel Chipset Device Software 9.4.0.1017
- http://www.mediafire.com/file/hyx3l0e65rhcpca/STOR_Win7_XP_11.7.4.1001.zip/file" rel="nofollow - Intel Rapid Storage Technology 11.7.4.1001
Some 3DMark and AIDA64 benchmark results are https://www.techpowerup.com/forums/threads/meltdown-and-spectre-patched-bios-for-x58-motherboards.246101/post-3873012" rel="nofollow - available here .
I normally hang on TechPowerUp, here's the https://www.techpowerup.com/forums/threads/meltdown-and-spectre-patched-bios-for-x58-motherboards.246101/" rel="nofollow - original thread in case you want to report a bug.
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