I have the following build:
MB GIGABYTE GA-EP43-UD3L 775 P43 R
CPU INTEL|PDC E6300 2.8G 2M RT
HD 500G|SEAGATE ST3500418AS
VGA HIS H485QT512P HD4850 512M RT
PSU COMPUCASE|HP485D RETAIL 485W RT
MEM 2Gx2|CRUC CT2KIT25664AA800 R
i have no problem with any components being installed and working on this board except the ram, i put the ram in both yellow sockets (1/3) and memtest86 freezes, i put them in the red ones (2/4) it freezes. 1/4 & 2/3 also freeze, I try running each ram stick alone they are fine they pass the test. i want to note also i am able to boot fine with dual channeling but if i do anything ram intensive it will freeze.
Also i updated my bios to f8
screenshot of memtest freezing
bios settings
MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster ...............: Auto
CPU Clock Ratio ..........................:10
Fine CPU Clock Ratio.....................:+0.5
CPU Frequency ...........................: 2.8(266x10.5)
Clock Chip Control
Standard Clock Control
CPU Host Clock Control..................: [Disabled]
CPU Host Frequency (Mhz) ............:266 Mhz
PCI Express Frequency (Mhz) .........:auto
C.I.A.2 .................................:[Disabled]
Advanced Clock Control [Press Enter]
CPU Clock Drive...........................: 800
PCI Express Clock Drive.................:800
CPU Clock Skew (ps)....................: 0
MCH Clock Skew (ps)...................: 0
DRAM Performance Control
Performance Enhance...................: [turbo]
Extreme Memory Profile (X.M.P.).....: I do not have this setting
(G)MCH Frequency Latch...............: [Auto]
System Memory Multiplier ..............: auto
Memory Frequency (Mhz) ..............: 800
DRAM Timing Selectable ................: [auto]
Standard Timing Control
CAS Latency Time........................6
tRCD .........................................6
tRP'...........................................6
tRAS..........................................18
Set all Suggested below to highest Values first. Then later you can lower, one at a time, testing as you go
Advanced Timing Control
tRRD...........................................3
tWTR..........................................3
tWR............................................6
tRFC...........................................52
tRTP...........................................3
Command Rate (CMD) ....................:0
Driving Strength Profiles
Driving Strength ............................
Channel A
Static tRead Value.........................:5
tRD Phase0 Adjustment...................:Auto 0
tRD Phase1 Adjustment...................:Auto 0
tRD Phase2 Adjustment .................:Auto 1
tRD Phase3 Adjustment..................:Auto 1
Trd2rd(Different Rank)....................:Auto 6
Twr2wr(Different Rank)...................:Auto 6
Twr2rd(Different Rank)...................:Auto 5
Trd2wr(Same/Diff Rank)..................:Auto 8
Dimm1 Clock Skew Control...............:Auto ps
Dimm2 Clock Skew Control...............:Auto ps
Channel B
Static tRead Value.........................:5
tRD Phase0 Adjustment...................:Auto 0
tRD Phase1 Adjustment...................:Auto 0
tRD Phase2 Adjustment .................:Auto 1
tRD Phase3 Adjustment..................:Auto 1
Trd2rd(Different Rank)....................:Auto 6
Twr2wr(Different Rank)...................:Auto 6
Twr2rd(Different Rank)...................:Auto 5
Trd2wr(Same/Diff Rank)..................:Auto 8
Dimm1 Clock Skew Control...............:Auto ps
Dimm2 Clock Skew Control...............:Auto ps
Motherboard Voltage Control
CPU
CPU Vcore….……….1.2875............:Auto no over clocking
CPU Termination…..... 1.200V....: auto no over clocking
CPU PLL…………………....1.500V.......: I don't have a setting for that
CPU Referen.…………....0.805.......: auto
MCH/ICH
MCH Core…………….....1.100V...........:auto
MCH Reference….…….0.760V...........; Don't see it
MCH/DRAM Ref.…......0.900V...........: Don't see it
ICH I/O……………….....1.550V............: auto
ICH Core…………...……1.100V............: Don't see it
DRAM
DRAM Voltage ……....1.800V............:
DRAM Termination .…0.900V............: Don't see it
Channel A Reference 0.900V............: Don't see it
Channel B Reference 0.900V............: Don't see it
Advanced Settings
Limit CPUID Max. to 3.....................: [Disabled]
No-Execute Memory Protect............: [Enabled]
CPU Enhanced Halt (C1E)................: [Enabled]
C2/C2E State Support....................: [Disabled]
x C4/C4E State Support..................: [Disabled]
CPU Thermal Monitor 2(TM2) ...........: [Enabled]
CPU EIST Function.........................: [Enabled]
Virtualization Technology................: [Enabled] No i don't have virtual PC, i don't even know whats that
Integrated Peripherals
Legacy USB Storage Detect ..............[Enabled] Its on to use memtest
MB GIGABYTE GA-EP43-UD3L 775 P43 R
CPU INTEL|PDC E6300 2.8G 2M RT
HD 500G|SEAGATE ST3500418AS
VGA HIS H485QT512P HD4850 512M RT
PSU COMPUCASE|HP485D RETAIL 485W RT
MEM 2Gx2|CRUC CT2KIT25664AA800 R
i have no problem with any components being installed and working on this board except the ram, i put the ram in both yellow sockets (1/3) and memtest86 freezes, i put them in the red ones (2/4) it freezes. 1/4 & 2/3 also freeze, I try running each ram stick alone they are fine they pass the test. i want to note also i am able to boot fine with dual channeling but if i do anything ram intensive it will freeze.
Also i updated my bios to f8
screenshot of memtest freezing

bios settings
MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster ...............: Auto
CPU Clock Ratio ..........................:10
Fine CPU Clock Ratio.....................:+0.5
CPU Frequency ...........................: 2.8(266x10.5)
Clock Chip Control
Standard Clock Control
CPU Host Clock Control..................: [Disabled]
CPU Host Frequency (Mhz) ............:266 Mhz
PCI Express Frequency (Mhz) .........:auto
C.I.A.2 .................................:[Disabled]
Advanced Clock Control [Press Enter]
CPU Clock Drive...........................: 800
PCI Express Clock Drive.................:800
CPU Clock Skew (ps)....................: 0
MCH Clock Skew (ps)...................: 0
DRAM Performance Control
Performance Enhance...................: [turbo]
Extreme Memory Profile (X.M.P.).....: I do not have this setting
(G)MCH Frequency Latch...............: [Auto]
System Memory Multiplier ..............: auto
Memory Frequency (Mhz) ..............: 800
DRAM Timing Selectable ................: [auto]
Standard Timing Control
CAS Latency Time........................6
tRCD .........................................6
tRP'...........................................6
tRAS..........................................18
Set all Suggested below to highest Values first. Then later you can lower, one at a time, testing as you go
Advanced Timing Control
tRRD...........................................3
tWTR..........................................3
tWR............................................6
tRFC...........................................52
tRTP...........................................3
Command Rate (CMD) ....................:0
Driving Strength Profiles
Driving Strength ............................
Channel A
Static tRead Value.........................:5
tRD Phase0 Adjustment...................:Auto 0
tRD Phase1 Adjustment...................:Auto 0
tRD Phase2 Adjustment .................:Auto 1
tRD Phase3 Adjustment..................:Auto 1
Trd2rd(Different Rank)....................:Auto 6
Twr2wr(Different Rank)...................:Auto 6
Twr2rd(Different Rank)...................:Auto 5
Trd2wr(Same/Diff Rank)..................:Auto 8
Dimm1 Clock Skew Control...............:Auto ps
Dimm2 Clock Skew Control...............:Auto ps
Channel B
Static tRead Value.........................:5
tRD Phase0 Adjustment...................:Auto 0
tRD Phase1 Adjustment...................:Auto 0
tRD Phase2 Adjustment .................:Auto 1
tRD Phase3 Adjustment..................:Auto 1
Trd2rd(Different Rank)....................:Auto 6
Twr2wr(Different Rank)...................:Auto 6
Twr2rd(Different Rank)...................:Auto 5
Trd2wr(Same/Diff Rank)..................:Auto 8
Dimm1 Clock Skew Control...............:Auto ps
Dimm2 Clock Skew Control...............:Auto ps
Motherboard Voltage Control
CPU
CPU Vcore….……….1.2875............:Auto no over clocking
CPU Termination…..... 1.200V....: auto no over clocking
CPU PLL…………………....1.500V.......: I don't have a setting for that
CPU Referen.…………....0.805.......: auto
MCH/ICH
MCH Core…………….....1.100V...........:auto
MCH Reference….…….0.760V...........; Don't see it
MCH/DRAM Ref.…......0.900V...........: Don't see it
ICH I/O……………….....1.550V............: auto
ICH Core…………...……1.100V............: Don't see it
DRAM
DRAM Voltage ……....1.800V............:
DRAM Termination .…0.900V............: Don't see it
Channel A Reference 0.900V............: Don't see it
Channel B Reference 0.900V............: Don't see it
Advanced Settings
Limit CPUID Max. to 3.....................: [Disabled]
No-Execute Memory Protect............: [Enabled]
CPU Enhanced Halt (C1E)................: [Enabled]
C2/C2E State Support....................: [Disabled]
x C4/C4E State Support..................: [Disabled]
CPU Thermal Monitor 2(TM2) ...........: [Enabled]
CPU EIST Function.........................: [Enabled]
Virtualization Technology................: [Enabled] No i don't have virtual PC, i don't even know whats that
Integrated Peripherals
Legacy USB Storage Detect ..............[Enabled] Its on to use memtest