Unique BIOS protects X58 motherboards
These are unofficial releases, created by Regeneration, who previously also created NGO VGA drives.
Nehalem processors built into boards with LGA1366 sockets started 10 years ago, yet models that can be used to this day can be found here. The BIOS updates available at the links below will (in principle) protect you against Meltdown and Specter errors (CVE-2017-5715, CVE-2017-5753, CVE-2017-5754) because they contain the latest microcode (0x1F - Westmere, 0x1D - Bloomfield), but it's okay to know that these are unfortunately unofficial versions, so no one is responsible for any problems!
ASRock
- ASRock X58 Deluxe
- ASRock X58 Deluxe3
- ASRock X58 Extreme
- ASRock X58 Extreme3
- ASRock X58 Extreme6
- ASRock X58 SuperComputer
ASUS
- ASUS P6T
- ASUS P6T SE
- ASUS P6T Deluxe
- ASUS P6T Deluxe V2
- ASUS P6TD Deluxe
- ASUS P6T Deluxe / OC Palm
- ASUS P6T6 WS Revolution
- ASUS P6T7 WS SuperComputer
- ASUS P6T WS Professional
- ASUS P6X58D Premium
- ASUS P6X58D-E
- ASUS P6X58-E WS
- ASUS P6X58-E PRO
- ASUS Rampage II Gene
- ASUS Rampage II Extreme
- ASUS Rampage III Gene
- ASUS Rampage III Formula
- ASUS Rampage III Extreme
- ASUS Sabertooth X58
- ASUS Z8NA-D6
- ASUS Z8NA-D6C
- ASUS Z8NR-D12
- ASUS Z8NH-D12
- ASUS Z8PE-D12
- ASUS Z8PE-D12X
- ASUS Z8PE-D18
- ASUS Z8PH-D12 SE / QDR
- ASUS Z8PH-D12 / IFB
EVGA
- EVGA X58 SLI Micro (121-BL-E756)
- EVGA X58 SLI3 (131-GT-E767)
- EVGA X58 SLI (132-BL-E758)
- EVGA X58 FTW3 (132-GT-E768)
- EVGA X58 SLI LE (141-BL-E757)
- EVGA X58 SLI Classified (141-BL-E759)
- EVGA X58 SLI Classified (141-BL-E760)
- EVGA X58 SLI Classified (141-BL-E761)
- EVGA X58 SLI Classified Hydro Copper (141-BL-E764)
- EVGA X58 SLI Classified Hydro Copper (141-BL-E769)
- EVGA X58 Classified3 (141-GT-E770)
- EVGA X58 Classified 4-Way SLI (170-BL-E762)
- EVGA Classified SR-2 (270-WS-W555)
Gigabyte
- Gigabyte G1.Assassin
- Gigabyte G1.Sniper
- Gigabyte G1.Guerrilla
- Gigabyte GA-X58A-OC
- Gigabyte GA-X58A-UD9
- Gigabyte GA-X58A-UD7
- Gigabyte GA-X58A-UD7 (Revision 2.0)
- Gigabyte GA-X58A-UD5
- Gigabyte GA-X58A-UD5 (Revision 2.0)
- Gigabyte GA-X58A-UD3R
- Gigabyte GA-X58A-UD3R (Revision 2.0)
- Gigabyte GA-X58-USB3
- Gigabyte GA-EX58-EXTREME
- Gigabyte GA-EX58-UD5
- Gigabyte GA-EX58-UD4P
- Gigabyte GA-EX58-UD4
- Gigabyte GA-EX58-DS4
- Gigabyte GA-EX58-UD3R-SLI
- Gigabyte GA-EX58-UD3R
- Gigabyte GA-EX58-UD3R (Revision 1.6 / 1.7)
MSI
- MSI X58 Pro
- MSI X58 Pro SLI
- MSI X58 Pro-E
- MSI X58 Pro-E SLI
- MSI X58 Pro-E USB3
- MSI X58 Platinum
- MSI X58 Platinum SLI
- MSI X58A-GD45
- MSI X58A-GD65 (M)
- MSI X58A-GD65 (N)
- MSI X58M
- MSI X58M SLI
- MSI Eclipse Plus
- MSI Eclipse SLI
Mixed
- Biostar TPower X58
- Biostar TPower X58A
- Foxconn Bloodrage
- Foxconn Bloodrage GTI
- Foxconn FlamingBlade
- Foxconn FlamingBlade GTI
- Sapphire Pure Black X58
The fixes generally do not result in a significant loss of performance, more on that here!
Source: techpowerup.com