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Help w/ RAM in BIOS (PRIME95 Fails)

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July 26, 2011 6:55:28 AM

I need help adjusting my RAM voltages and timing.
I get BSOD maybe once a day and PRIME95 passes small test but fails blend test in about 2 seconds.


My ram: http://www.gskill.com/products.php?index=243
Mobo: ASUS P7p55d-e Pro

rated voltage was 1.65V so thats what I set DRAM to in BIOS.
rated timings was 7-8-7-24 but it crashed when i tried 7-8-8-24 so im doing 8-8-8-24.

I can get into windows and do normal operations but fails prime95 in 2 seconds.

If you need more specs please ask.

More about : ram bios prime95 fails

July 26, 2011 10:16:57 AM

I have the same RAM and facing some BSODs (but my system is AMD). RAM rated voltage is 1.6V not 1.65V. So first try 1.6v only.

How many DIMM modules you are using ?

I don't have issue in Prime95 (ran at-most for 8 or 9 hours till now in single go); but facing some random crashes mostly once in a day.

Now playing with CPU and RAM voltages and at the moment my RAM voltage is 1.61v (I am using 4 modules of RAM means 2 kits).

Try setting it to 7-8-7-24 - 40 - 2T _and_ voltage to 1.6v (not 1.65v)
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a b } Memory
July 26, 2011 3:07:04 PM

Please disregard henydiah's usual babble. He makes zero sense. Why he would tell you to disable cstate, c1e and speedstep makes absolutely zero sense, just like the majority of his posts.

Anyways, If the ram will not run stable at 1600/1.6v/7-8-7-24, then return it.

However you never stated what speed your running it at. Is it set at 1600mhz?
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a b } Memory
July 26, 2011 4:21:22 PM

Download cpu-z and copy/paste us the memory and spd tabs.
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July 27, 2011 1:57:35 AM

Processors Information
-------------------------------------------------------------------------

Processor 1 ID = 0
Number of cores 4 (max 8)
Number of threads 4 (max 16)
Name Intel Core i5 750
Codename Lynnfield
Specification Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz
Package (platform ID) Socket 1156 LGA (0x1)
CPUID 6.E.5
Extended CPUID 6.1E
Core Stepping B1
Technology 45 nm
Core Speed 4018.0 MHz
Multiplier x FSB 21.0 x 191.3 MHz
Rated Bus speed 3444.0 MHz
Stock frequency 2666 MHz
Instructions sets MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, EM64T, VT-x
L1 Data cache 4 x 32 KBytes, 8-way set associative, 64-byte line size
L1 Instruction cache 4 x 32 KBytes, 4-way set associative, 64-byte line size
L2 cache 4 x 256 KBytes, 8-way set associative, 64-byte line size
L3 cache 8 MBytes, 16-way set associative, 64-byte line size
FID/VID Control yes

Turbo Mode supported, enabled
Max turbo frequency 3200 MHz
Max non-turbo ratio 20x
Max turbo ratio 24x
Max efficiency ratio 9x
TDP Limit 95 Watts
TDC Limit 89 Amps
Core TDP 89 Watts
Uncore TDP 6 Watts
Power @ 9x 14 Watts
Power @ 10x 17 Watts
Power @ 11x 20 Watts
Power @ 12x 25 Watts
Power @ 13x 30 Watts
Power @ 14x 36 Watts
Power @ 15x 43 Watts
Power @ 16x 51 Watts
Power @ 17x 60 Watts
Power @ 18x 70 Watts
Power @ 19x 82 Watts
Power @ 20x 95 Watts
Max bus number 63




Chipset
-------------------------------------------------------------------------

Northbridge Intel DMI Host Bridge rev. 11
Southbridge Intel P55 rev. 06
Graphic Interface PCI-Express
PCI-E Link Width x8
PCI-E Max Link Width x16
Memory Type DDR3
Memory Size 4096 MBytes
Channels Dual
Memory Frequency 765.3 MHz (2:8)
CAS# latency (CL) 7.0
RAS# to CAS# delay (tRCD) 8
RAS# Precharge (tRP) 7
Cycle Time (tRAS) 24
Row Refresh Cycle Time (tRFC) 85
Command Rate (CR) 2T
Uncore Frequency 3061.3 MHz



Memory SPD
-------------------------------------------------------------------------

DIMM # 1
SMBus address 0x50
Memory type DDR3
Module format UDIMM
Manufacturer (ID) G.Skill (7F7F7F7FCD000000)
Size 2048 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number F3-12800CL7-2GBRM
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.1
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-17-23 @ 457 MHz
JEDEC #2 7.0-7-7-20-27 @ 533 MHz
JEDEC #3 8.0-8-8-22-31 @ 609 MHz
JEDEC #4 9.0-9-9-25-34 @ 685 MHz
XMP profile XMP-1600
Specification PC3-12800
Voltage level 1.600 Volts
Min Cycle time 1.250 ns (800 MHz)
Min tRP 8.75 ns
Min tRCD 10.00 ns
Min tWR 15.00 ns
Min tRAS 30.00 ns
Min tRC 49.00 ns
Min tRFC 110.00 ns
Min tRTP 7.50 ns
Min tRRD 6.00 ns
Command Rate 2T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 7.0-8-7-24-40-2T @ 800 MHz (1.600 Volts)

DIMM # 2
SMBus address 0x52
Memory type DDR3
Module format UDIMM
Manufacturer (ID) G.Skill (7F7F7F7FCD000000)
Size 2048 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number F3-12800CL7-2GBRM
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.1
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-17-23 @ 457 MHz
JEDEC #2 7.0-7-7-20-27 @ 533 MHz
JEDEC #3 8.0-8-8-22-31 @ 609 MHz
JEDEC #4 9.0-9-9-25-34 @ 685 MHz
XMP profile XMP-1600
Specification PC3-12800
Voltage level 1.600 Volts
Min Cycle time 1.250 ns (800 MHz)
Min tRP 8.75 ns
Min tRCD 10.00 ns
Min tWR 15.00 ns
Min tRAS 30.00 ns
Min tRC 49.00 ns
Min tRFC 110.00 ns
Min tRTP 7.50 ns
Min tRRD 6.00 ns
Command Rate 2T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 7.0-8-7-24-40-2T @ 800 MHz (1.600 Volts)

DIMM # 1
SPD registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 92 10 0B 02 02 11 00 09 03 52 01 08 0C 00 3C 00
10 69 78 69 30 69 11 20 8C 70 03 3C 3C 00 F0 83 81
20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 0F 11 01 01
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 04 CD 00 00 00 00 00 00 00 DC 1F
80 46 33 2D 31 32 38 30 30 43 4C 37 2D 32 47 42 52
90 4D 00 00 00 04 CD 00 00 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0 0C 4A 01 11 01 08 00 00 00 2C 0A 46 08 00 46 46
C0 50 78 10 F0 88 3E 00 70 03 3C 30 11 F0 3C 00 00
D0 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

DIMM # 2
SPD registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 92 10 0B 02 02 11 00 09 03 52 01 08 0C 00 3C 00
10 69 78 69 30 69 11 20 8C 70 03 3C 3C 00 F0 83 81
20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 0F 11 01 01
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 04 CD 00 00 00 00 00 00 00 DC 1F
80 46 33 2D 31 32 38 30 30 43 4C 37 2D 32 47 42 52
90 4D 00 00 00 04 CD 00 00 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0 0C 4A 01 11 01 08 00 00 00 2C 0A 46 08 00 46 46
C0 50 78 10 F0 88 3E 00 70 03 3C 30 11 F0 3C 00 00
D0 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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