RAM Timings

[Albo]

Couple of questions about my G.Skill 2GB DDR HZ PC4000 (2x1GB) CAS3 Dual Channel Kit (F1-4000USU2-2GBHZ)

 

1. How come I get a couple of errors when running memtest @250 on my G.Skill 2GB DDR HZ PC4000, when it's meant to run at 250?

 

2. CPU-Z shows my memory has timings 3-5-5-10 (default), but when I read up on overclocking it on the net it's down as 3-4-4-8! what's up with that?

 

Thanks.

[Albo]

Link to review -

http://www.madshrimps.be/?action=getarticl...522&articID=385

[Guest erico]

Couple of questions about my G.Skill 2GB DDR HZ PC4000 (2x1GB) CAS3 Dual Channel Kit (F1-4000USU2-2GBHZ)

 

1. How come I get a couple of errors when running memtest @250 on my G.Skill 2GB DDR HZ PC4000, when it's meant to run at 250?

 

2. CPU-Z shows my memory has timings 3-5-5-10 (default), but when I read up on overclocking it on the net it's down as 3-4-4-8! what's up with that?

 

Thanks.

3-4-4-8 is also what GSkill's site says they are supposed to be

http://www.gskill.com/indexen.html

what do you have VDimm set to? can be 2.6-2.8v

CPUZ shows both SPD and the set values. By default I take it you mean SPD values.

Do both sticks show the same values as SPD?

I have heard of people having to send their RAM back to companies to have the SPD reprogrammed. You can RMA them because of that.

So...have you tried changing the settings to what GSkill and what you found says will work?

try upping the voltage a tad as well as it is within their advertized values

[Praz]

The ram does run at 3-4-4-8. They were programmed to 3-5-5-10 to allow a successful first-time bootup with a wider range of motherboards.

 

A few errors at the manufacturer's specified speed can just as easily be caused by improper timings. Use A64Info and post a screenshot of your settings.

[K33B4]

I'd recommend that you manually set 3-5-5-10 timing to help run the max bandwidth of that ram. I've managed to get upto 270x10 at 1T from these rams at 3-5-5-10. Now that's the lowest cuz of this processor but i managed to get 265x11 from these sticks with an Opty 148. So try your luck and see if relaxing timings helps get rid of those errors.

[Albo]

Yes, I mean the SPD values. Both stick show the same. What I can't understand is why it's throwing errors at 230MHZ when the timings are more relaxed than they should be. I have emailed G.Skill with no reply yet.

[Kingfisher]

can you list your full timings using this worksheet?

The numbers I filled in should be used for sure, forget using 3-5-10-5.

I doubt anyone uses those timings on DDR memory.

 

[b]Genie BIOS Settings:[/b]

[color=red]

FSB Bus Frequency.............................  - 

LDT/FSB Frequency Ratio.......................  - 

CPU/FSB Frequency Ratio.......................  -  

PCI eXpress Frequency.........................  -  

CPU VID StartUp Value.........................  -  



CPU VID Control...............................  -  

CPU VID Special Control.......................  -  

LDT Voltage Control...........................  - 

Chip Set Voltage Control......................  -

DRAM Voltage Control..........................  -  

[/color]

[b]DRAM Configuration Settings:[/b]

[color=red]

DRAM Frequency Set............................  -  

Command Per Clock (CPC).......................  -   

CAS Latency Control (Tcl).....................  - 3 

RAS# to CAS# delay (Trcd).....................  - 4

Min RAS# active time (Tras)...................  -  8

Row precharge time (Trp)......................  -  4

Row Cycle time (Trc)..........................  - 

Row refresh cyc time (Trfc)...................  - 

Row to Row delay (Trrd).......................  -  

Write recovery time (Twr).....................  -  

Write to Read delay (Twtr)....................  - 

Read to Write delay (Trwt)....................  -  

Refresh Period (Tref).........................  -  3120

DRAM Bank Interleave..........................  -  



DQS Skew Control..............................  -  

DQS Skew Value................................  - 

DRAM Drive Strength...........................  -  

DRAM Data Drive Strength......................  -  

Max Async Latency.............................  -  

DRAM Response Time............................  -  

Read Preamble Time............................  - 

IdleCycle Limit...............................  - 

Dynamic Counter...............................  -  

R/W Queue Bypass..............................  -  

Bypass Max....................................  -  

32 Byte Granularity...........................  -  

[/color]