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**GSKILL TECH** · 04-02-2010, 11:37 AM

Should look like this:

CPU Host Clock Control - Enabled
CPU Host Frequency - 333
Performance Enhance - Standard
Extreme Memory Profile - Disabled
System Memory Mulitplier - 3.20B
DRAM Timing Selectable - Manual
CAS Latency - 5
tRCD - 5
tRP - 5
tRAS - 15

Advanced Timing Control (submenu)
tRRD - 4
tWTR - 4
tWR - 8
tRFC - 80
tRTP - 4
Command Rate - 2

Load Line Calibration - Disabled
MCH Core - 1.40V
DRAM Voltage - 2.10V

Let me know how that goes.

Thank you
GSKILL TECH

**andyslough** · 04-02-2010, 10:50 PM

Thanks for getting back to me so quickly. It's just the kind of detail I was hoping for. I hope to be able to try this later today or it may have to be tomorrow and then I will post the results here.

Andy

**andyslough** · 04-03-2010, 01:40 AM

Ok I have been able to test the settings you suggested (thanks)...

I was not able to set Load Line Calibration - a quck search around says this is not supported on the GA-Ep45-DS3R. I set all the others as you suggested, with all 4 sticks of ram in place and ran memtest86+ V4.0

It failled tests 5, 6, 7 (still running at this point and at 62208 errors)

Also I noticed that the memory throughput with these settings is worse than it was before.
Previously it was 4777MB/s dual channel (with two sticks in either slots1&3 or slots2&4)
with your settings and 4 sticks (all four slots in use) the rate has dropped to 4470 MB/s
How do these figures look to you? Reasonable or poor?

Are there any more settings I can tweak?

Best regards,

Andy

**Tradesman** · 04-03-2010, 07:54 AM

Might want to kick up tRFC to 88, also ensure you've loaded the base timings, Command Rate and DRAM Voltage manually. Also, what is your vCore voltage, may be a bit low, especially if using default.

**andyslough** · 04-04-2010, 05:05 AM

Hi Tradesman,

Thanks for your suggestions - by base timings do you mean the 5-5-5-15 timings?
If so these have been set manually as suggested by G Skill Tech. I upped the tRFC to 88 as you suggested but with all the other settings as recommended in post #2 memtest86+ failed in test 1

The vCore voltage is 1.25V which is the default. Does that seem low to you (I've no idea what this should be set to)

Thanks

Andy

**Tradesman** · 04-04-2010, 06:56 AM

With the CPU running at the stock FSB of 1333 I'd try upping the vCore to 1.275 or so, also disable EIST, C1E, Speedstep.

**GSKILL TECH** · 04-05-2010, 11:47 AM

Try testing each module with the following settings:

Load BIOS defaults, then enter...

CPU Host Clock Control - Enabled
CPU Host Frequency - 333
Performance Enhance - Standard
Extreme Memory Profile - Disabled
System Memory Mulitplier - 3.20B
DRAM Timing Selectable - Manual
CAS Latency - 5
tRCD - 5
tRP - 5
tRAS - 15

Advanced Timing Control (submenu)
tRRD - 4
tWTR - 4
tWR - 8
tRFC - 68
tRTP - 4
Command Rate - 2

DRAM Voltage - 2.10V

Let me know the results and I will be able to further assist you.

Thank you
GSKILL TECH

**andyslough** · 04-05-2010, 12:06 PM

Hi G Skill Tech. Thanks for your response. I can tell you already that they work independently and even in pairs although not 100% reliably at the settings you have listed. Apart from the voltage, the rest are the default settings I get. I upped the voltage pretty early on after reading round various forums.

The real problem is trying to get all four working together.
When all four are in there there is no way, so far, I can get them stable at 1066.
In memtest86+ they are displayed as DDR2-400?? How does that fit into the equation?

Also I'd be grateful if you can comment on the throughput of these sticks? What kind of figure should I be seeing for MB/s with 1066 ram?

Best regards,

Andy

**GSKILL TECH** · 04-05-2010, 12:19 PM

If they do not work 100% with two modules, they will surely have issues with four. So you will need to send those in for new replacements if that is the case. Memtest86+ shows DDR2-400 while BIOS is set to DDR2-1066? That beats me..

Depending on program, DDR2-1066 should be roughly 7000MB/s

Thank you
GSKILL TECH

**andyslough** · 04-08-2010, 11:11 AM

Can you explain how come the specifications for this ram describe it as

DDR2 1066 / PC2 8500

*AND*

SPD programmed at
- JEDEC Standard latencies 5-5-5-15 at DDR2 800

Can you confirm that this ram is meant to run at 1066? Why are so many people having problems running at this speed? If I send the ram back using RMA and I am sent more ram which is just the same then I will have spent money on postage with no benefit.

I want to be absolutely clear that 1066 mean 1066 and not 800 or 1000

Best regards,

Andy

**andyslough** · 04-08-2010, 11:12 AM

PS I got the specifications here: http://www.gskill.com/images/images_...on%20Guide.pdf

**GSKILL TECH** · 04-08-2010, 01:36 PM

For the SPD, do you see the EPP#1 Profile? That one should be 1066. The max JEDEC standard is 800 5-5-5-15, so that is correct. Send me screen shots of what you're looking at and I can confirm it. People have issues for many reasons. You see a lot of it here because this is where you go if you have problems. Look at the reviews, these are really nice DDR2-1066 modules.

I don't want you to send them back for no reason either, but based off this thread so far, that's all I can suggest.

Yes, 1066 means 1066. This memory package should not even have issues with 1100. I personally have tested on all EP45 motherboards, 8GB and 4GB, at DDR2-1100, no problem. Very, very common setup. Libraries, computer labs, and such all use this particular combination.

Thank you
GSKILL TECH

**andyslough** · 04-08-2010, 09:49 PM

SPD Values

Hi G Skill Tech,

Sorry I am just getting frustrated because I expected these DIMMs to just work. I've never had issues in the past when building PCs so I don't understand what is causing the problem here.

While I am writing this I can't see how to upload an image. I can see how to link to an exisitng online image. I will try to include a snapshot of the SPD info. To answer your question I do see EPP#1 using CPU-Z but this also tells me the max bandwidth is PC2-6400 (400MHz). There is so much stuff that doesn't add up here

http://picasaweb.google.co.uk/lh/pho...eat=directlink

If you are convinced this ram should work with this motherboard then I will RMA it and hope that the replacements work.

Andy
PS I've just seen that I "may not post attachments" so I've tried to link to the photo.

**GSKILL TECH** · 04-09-2010, 11:55 AM

I understand it can be frustrating, that's why I am here to help you out and walk you through the process. =)

The max bandwidth will always be PC2-6400 (400MHz) for any DDR2 motherboard. That value is based off the motherboard JEDEC standard, not the RAM. That is the reason why JEDEC #2 is 400MHz (max), then EPP#1 is 533MHz. Also the reason why anything above DDR2-800 must be manually configured in BIOS.

Now, please work with me here... you said every module works fine by itself. Did you memtest each stick to insure none are defective? Because you then go on to say you have issues with 2 modules.
Here's where things aren't making sense. If all modules are working fine individually, they should be able to operate together as well.

So at this point, I can not exactly pinpoint the problem. My main concern is I don't want you to spend time and money sending them back when they work just fine. So your testing/troubleshooting cooperation would be greatly appreciated.

Thank you
GSKILL TECH

Announcement

F2-8500CL5D-4GBPK unstable with GA-EP45DS3R

F2-8500CL5D-4GBPK unstable with GA-EP45DS3R

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