GA-G41MT-USB3 and 1333 MHz memory

[Sam_2011]

I have a GA-G41MT-USB3 motherboard (FSB 333 MHz) that takes 1333 MHz memory when overclocked.

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BIOS Setup:
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(G)MCH Frequency Latch is set to [AUTO] which is the default

System Memory multiplier (SPD) can be set to one of: AUTO, 2.40B, 3.20B, 4.00C, 3.00A, or 4.00A

Item help displays the following:

[AUTO] set memory frequency by DRAM SPD data

X.XXA => FSB 266 MHz
X.XXB => FSB 333 MHz
X.XXC => FSB 200 MHz

-------------------------------------------

Setting System Memory multiplier (SPD) to either 4.00A or 4.00C works fine.

The propper value seems to be 4.00B since this is an FSB 333 MHz mothorboard, but such an option doesn't exist.

My Question: is selecting one of 4.00A or 4.00C prefered over the other or they are equally the same.

Thanks,
Sam

[Chike]

Re: GA-G41MT-USB3 and 1333 MHz memory

What processor do you have? And what is the default memory frequency?

EDIT: Can you attach a CPU-Z text report (CPU-Z -> About tab -> Create Report (.TXT))

[Sam_2011]

Re: GA-G41MT-USB3 and 1333 MHz memory

Hi Chike,

Intel Core 2 Duo E8200 - 2.66MHz
Kingston HyperX 8GB (2 x 4GB) DDR3 1600MHz - KHX1600C9D3K2/8GX

===> CPU-Z text report is too long so I copied what I thought may be relevant

CPU-Z TXT Report
-------------------------------------------------------------------------

Binaries
-------------------------------------------------------------------------

CPU-Z version 1.57

Processors
-------------------------------------------------------------------------

Number of processors 1
Number of threads 2

APICs
-------------------------------------------------------------------------

Processor 0
-- Core 0
-- Thread 0 0
-- Core 1
-- Thread 0 1

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

Processor 1 ID = 0
Number of cores 2 (max 2)
Number of threads 2 (max 2)
Name Intel Core 2 Duo E8200
Codename Wolfdale
Specification Intel(R) Core(TM)2 Duo CPU E8200 @ 2.66GHz
Package (platform ID) Socket 775 LGA (0x0)
CPUID 6.7.6
Extended CPUID 6.17
Core Stepping C0
Technology 45 nm
TDP Limit 65 Watts
Core Speed 2000.0 MHz
Multiplier x FSB 6.0 x 333.3 MHz
Rated Bus speed 1333.3 MHz
Stock frequency 2666 MHz
Instructions sets MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, EM64T, VT-x
L1 Data cache 2 x 32 KBytes, 8-way set associative, 64-byte line size
L1 Instruction cache 2 x 32 KBytes, 8-way set associative, 64-byte line size
L2 cache 6144 KBytes, 24-way set associative, 64-byte line size
FID/VID Control yes
FID range 6.0x - 8.0x
Max VID 1.225 V

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

Northbridge Intel G41 rev. A3
Southbridge Intel 82801GB (ICH7/R) rev. A1
Graphic Interface PCI-Express
PCI-E Link Width x16
PCI-E Max Link Width x16
Memory Type DDR3
Memory Size 8192 MBytes
Channels Dual, (Symmetric)
Memory Frequency 666.7 MHz (1:2)
CAS# latency (CL) 9.0
RAS# to CAS# delay (tRCD) 9
RAS# Precharge (tRP) 9
Cycle Time (tRAS) 24
Row Refresh Cycle Time (tRFC) 127
Command Rate (CR) 2T
MCHBAR I/O Base address 0x0FED14000
MCHBAR I/O Size 4096

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

DIMM # 1
SMBus address 0x50
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Kingston (7F98000000000000)
Size 4096 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number 9905403-198.A00LF
Serial number 3F06AA04
Manufacturing date Week 26/Year 11
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.2
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 8.0-8-8-22-30 @ 609 MHz
JEDEC #4 9.0-9-9-25-34 @ 685 MHz
XMP profile XMP-1600
Specification PC3-12800
Voltage level 1.650 Volts
Min Cycle time 1.250 ns (800 MHz)
Min tRP 11.25 ns
Min tRCD 11.25 ns
Min tWR 15.00 ns
Min tRAS 33.75 ns
Min tRC 45.00 ns
Min tRFC 160.00 ns
Min tRTP 7.50 ns
Min tRRD 6.00 ns
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 6.0-6-6-18-24-0T @ 533 MHz (1.650 Volts)
XMP #2 7.0-7-7-21-28-0T @ 622 MHz (1.650 Volts)
XMP #3 8.0-8-8-24-32-0T @ 711 MHz (1.650 Volts)
XMP #4 9.0-9-9-27-36-0T @ 800 MHz (1.650 Volts)

DIMM # 2
SMBus address 0x52
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Kingston (7F98000000000000)
Size 4096 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number 9905403-198.A00LF
Serial number 4106A904
Manufacturing date Week 26/Year 11
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.2
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 8.0-8-8-22-30 @ 609 MHz
JEDEC #4 9.0-9-9-25-34 @ 685 MHz
XMP profile XMP-1600
Specification PC3-12800
Voltage level 1.650 Volts
Min Cycle time 1.250 ns (800 MHz)
Min tRP 11.25 ns
Min tRCD 11.25 ns
Min tWR 15.00 ns
Min tRAS 33.75 ns
Min tRC 45.00 ns
Min tRFC 160.00 ns
Min tRTP 7.50 ns
Min tRRD 6.00 ns
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 6.0-6-6-18-24-0T @ 533 MHz (1.650 Volts)
XMP #2 7.0-7-7-21-28-0T @ 622 MHz (1.650 Volts)
XMP #3 8.0-8-8-24-32-0T @ 711 MHz (1.650 Volts)
XMP #4 9.0-9-9-27-36-0T @ 800 MHz (1.650 Volts)


Monitoring
-------------------------------------------------------------------------

Mainboard Model G41MT-USB3 (0x00000297 - 0x13CF9BD8)

[Chike]

Re: GA-G41MT-USB3 and 1333 MHz memory

You can attach the file to the post. Click Go Advanced and look below the editor.
Was this made with default settings?

EDIT: Indeed there should have been a 4.00B option, it looks as the options are for DDR2 memory only.

[Sam_2011]

Re: GA-G41MT-USB3 and 1333 MHz memory

CPU-Z text report is attached

Both 4.00A and 4.00C work fine. I just wonder if selecting one of them is prefered over the other or they are equally the same?

Thanks,
Sam

[Chike]

Re: GA-G41MT-USB3 and 1333 MHz memory

With DRAM Voltage 1.65v you can set:
DDR-1333 timings 8-8-8-24 (4.00C, 4.00C)
DDR-1066 timings 7-7-7-20 (3.20B)

Try both and see what is the lowest Static tRead Value(both channels) you can set wih each multiplier, and use to see which yields the best performance.

[Sam_2011]

Re: GA-G41MT-USB3 and 1333 MHz memory

Chike, thanks for your help

DDR-1333 timings 8-8-8-24 (4.00C, 4.00C)

Did you mean (4.00A, 4.00C) 4.00A or 4.00C?

About a month ago I set System Memory multiplier (SPD) to 4.00A and 4.00C. I didn't make any other changes. I ran memory tests for both values and both passed. The computer has been running fine.

I like to know if one of the two values (4.00A, 4.00C) is prefered over the other or they are equaly the same? May be I'm supposed to run MaxxMEM2_preview for both values and use the value that gives a better performance.

Being a non-overclocker, trying to get the best performance by changing latencies and voltage is beyond me. BUT if setting System Memory multiplier (SPD) by it self to 4.00A or 4.00C is wrong, I like to know.

Thanks,
Sam

[Chike]

Re: GA-G41MT-USB3 and 1333 MHz memory

Did you mean (4.00A, 4.00C) 4.00A or 4.00C?

Yesm sorry for the typo, I meant try each of the options and see which is best of them all.
Note the Static tRead instructions. Static tRad Value(a.k.a tRD, Performance Level in Mem Set) has great impact on memory performance.
4.00A was made for 266MHz FSB, 4.00C was made for 200MHz, but there's no way to know which is better until you try. There's no right or wrong, choose which works best, have best performance, but of course, stable.

[Sam_2011]

Re: GA-G41MT-USB3 and 1333 MHz memory

MaxxMEM2_preview performance test results for 4.00A and 4.00C are close but 4.00A repeatedly gave a little better latency value.

Since I'm a non-overclocker and Static tRad Value is under "Advanced Timing Controls", I will keep it set to AUTO for now.

Thanks a lot Chike,
Sam