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RAM Latency Guide for AMD64 - Pro Guru's Help!


Allegiance

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Hi,

 

Im would just to confirm some configuration settings for my Corsair 1GB XMS3200XL RAM. My System Specs are:

 

Processor:

AMD Athlon 64 3500+ (S939)

Operating System:

Windows XP Professional SP2.

Mobo:

Gigabyte GA-K8NXP-SLI

RAM:

Corsair 1GB XMS3200XL Dual Channel 2.2.2.5

Video:

XFX Geforce 6800GT 256MB DDR3 (2ns) 386MHz/1.05GHz

Storage:

2x Seagate 80GB SATA NCQ Raid 0

Audio:

Audigy 2 ZS & Logitech Z-640.

 

The settings are:

 

CAS Latency:

2.0

2.5

3.0

 

Row Cycle Time (tRC)

7-22

 

Row Refresh Cycle Time (tRFC)

9-24

 

RAS to CAS Delay (tRCD)

2-7

 

Row to Row Delay (tRRD)

2-4

 

Min RAS Active Time (tRAS)

5-15

 

Row Precharge Time (tRP)

2-6

 

Write Recovery Time (tWR)

2-3

 

Write to Read Delay (tWTR)

1-2

 

Read to Write Delay (tRWT)

1-6

 

Refresh Period (tREP)

1x1552

1x2064

1x2592

1x3120

1x3632

1x4128

1x4672

2x1552

2x2064

2x2592

2x3120

2x3632

2x4128

2x4672

4x1552

4x2064

4x2592

4x3120

4x3632

4x4128

4x4672

128 Cycles

 

And one last final setting is in my motherboards BIOS settings, it has a section called "MB Intelligent Tweaker" and it has a section in there called "MIB2" and it lets you select the Vendor/Brand of the RAM. The choices are:

 

Kingston/Winbond

A-Data/Hynix

Samsung/Samsung

Twinmos/Twinmos

Infineon/Infineon

 

What should i select?

 

If i select Samsung/Samsung

 

My Sandra score goes from:

 

Int Buff'd SSE2 5876MB/S

Float Buff'd SSE2 5820MB/S

 

to about:

 

Int Buff'd SSE2 62xxMB/S

Float Buff'd SSE2 61xxMB/S

 

However the system becomes unstable even with +.2 on the ram voltage

 

THANKS!!

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