New GSkill 4GB PK

Signal · 04-03-2008, 08:36 PM

No, not yet. I moved the sticks back to the X38 system to check them out.

Was worried that the heat spreaders being "moveable" was a problem and might have been related to the problem.

So far they have been checking out fine at the stock settings I listed above.
Looking at some of your 533 FSB settings for an E6850 on the DFI X38 LT right now.

eva2000 · 04-03-2008, 09:01 PM

Make sure to test ram on DFI X38 with 2:3 or 5:6 dividers to get memory isolated as other dividers have lower max mem clock ceilings due to latencies in chipset being tighter - i.e. hardest and tightest divider is 4:5 and 3:5 followed by 5:8 and 3:4

Signal · 04-03-2008, 09:24 PM

Thanks a bunch for that - Will do.

Are those latencies related to what Stilt found on the P35?
http://www.xtremesystems.org/forums/...d.php?t=147364

I'm starting to finally get somewhere and need to start documenting.

eva2000 · 04-03-2008, 09:44 PM

not sure if they're same latencies... but it's internal to the chipset not in bios configurable.

Signal · 04-03-2008, 11:08 PM

Yes, it wasn't a BIOS configurable option but they found something was setting the latencies (in the chipset) for different ratios. Point being it looked like it could be changed on the fly but that's another subject.

I'm hitting a wall at above 470FSB with 5:6 (DDR2 1129) 2.14v at default timings.
Using the DFI X38 LT, BIOS 111, and an E6850 with:

Code:

CPU Feature
- Thermal Management Control: Disabled
- PPM(EIST) Mode: Disabled
- Limit CPUID MaxVal: Disabled
- CIE Function: Disabled
- Execute Disable Bit: Disabled
- Virtualization Technology: Disabled
- Core Multi-Processing: Enabled

Exist Setup Shutdown: Mode 2
CLOCK VC0 divider: AUTO
CPU Clock Ratio: 7
- Target CPU Clock: 3290
CPU Clock: 470
Boot Up Clock: Auto
DRAM Speed: 333/800 (5:6)
- Target DRAM Speed: DDR2 1129
PCIE Clock: 100mhz

Voltage Settings
CPU VID Control: 1.300V
CPU VID Special Add: Auto
DRAM Voltage Control: 2.150V
SB Core/CPU PLL Voltage: 1.510V
NB Core Voltage: 1.356V
CPU VTT Voltage: 1.255V
Vcore Droop Control: Disabled
Clockgen Voltage Control: 3.45v
GTL+ Buffers Strength: Strong
Host Slew Rate: Weak
GTL REF Voltage Control: Enabled
x CPU GTL1/3 REF Volt: 88
x CPU GTL 0/2 REF Volt: 88
x North Bridge GTL REF Volt: 96

DRAM Timing
Enhanced Data transmitting: Fast
Enhance Addressing: Fast
T2 Displatch: AUTO
Clock Setting Fine Delay
- Ch1 Clock Crossing Setting: More Aggressive 
- DIMM 1 CLK fine delay:   Current 178ps
- DIMM 2 CLK fine delay:   Current 545ps
- DIMM 3 CLK fine delay:   Current 623ps
- DIMM 4 CLK fine delay:   Current 378ps
- Ch 1 Command fine delay: Current 890ps

- Ch2 Clock Crossing Setting: More Aggressive 
- DIMM 1 CLK fine delay:   Current 178ps
- DIMM 2 CLK fine delay:   Current 489ps
- DIMM 3 CLK fine delay:   Current 456ps
- DIMM 4 CLK fine delay:   Current 445ps
- Ch 2 Command fine delay: Current 890ps

Ch1Ch2 CommonClock Setting: More Aggressive

CAS Latency Time (tCL): AUTO
RAS# to CAS# Delay (tRCD): AUTO
RAS# Precharge (tRP): AUTO
Precharge Delay (tRAS): AUTO
All Precharge to Act: AUTO
REF to ACT Delay (tRFC): AUTO
Performance Level: AUTO
Read delay phase adjust: AUTO
MCH ODT Latency: AUTO
Write to PRE Delay (tWR): AUTO
Rank Write to Read (tWTR): AUTO
ACT to ACT Delay (tRRD): AUTO
Read to Write Delay (tRDWR): AUTO
Ranks Write to Write (tWRWR): AUTO
Ranks Read to Read (tRDRD): AUTO
Ranks Write to Read (tWRRD): AUTO
Read CAS# Precharge (tRTP): AUTO
ALL PRE to Refresh: AUTO

PCIE Slot Config: 1X 1X
CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
SATA Spread Spectrum: Disabled

The voltage on the DIMMs were doing fine at 2.09 (measured) up to 470 FSB.
I upped it to the 2.14 (measured) and got past a boot, but failed.

Didn't want to push these things to far tonight without looking at some other things that can help first.

I'll tackle this some more tomorrow.

Signal · 05-03-2008, 09:51 AM

Well, I'm shooting in the dark at this stage.

I'm either finding a hole/limit of the FSB on my E6850, the OC ability on these puppies aren't all that, or I'm just not doing something "right" yet.

Going to try and get the mem speed back to something lower and concentrate on the FSB side on the E6850.

Here are the Everest results from 450 and 460 FSB:

Signal · 05-03-2008, 11:14 PM

Ok.. I give up.

G.Skill is saying that these modules do not work (yet) with the DFI P35 or X38 boards.
Not sure what the exact issue is (can't get that out of them) but they claim they are working on something for them.

I didn't see any failures on the X38 with memtest86+ 1.70 with all the tests I did, but tried these again on the P35 at their default SPD DDR2 800 5-5-5-15 333/800 2.05v and they indeed still fail.

With the heat spreaders coming loose, the limited OC on the X38 (more than likely could be pushed a bit more), G.Skill saying don't use them on both the DFI P35 and X38, and other motherboard incompatibilities G.Skill is starting to find, I think it's time to stop working on these.

I'm trying to contact G.Skill directly to find out more, but for now I'm shelving them in their box ready to be RMA'd.

Here's the 2 other boards they know of.
Based on the last 680i comment, I don't know if these ASUS boards are known to have trouble with 2x 2GB 1066 kits or if it's specific to these modules.

G.SKILL does NOT recommend to run F2-8500CL5D-4GBPK on following motherboards.

Asus P965 Commando, Asus P965 P5B-Deluxe
(Recommneds F2-8500CL5D-2GBPK)

Asus P5N-D
(Recommends F2-8000CL5D-4GBPK)

4DIMM on any motherboard with NB nvidia 680i and 650i
(Recommands 2DIMM only)

eva2000 · 06-03-2008, 12:27 AM

Weird.. they should work... tried loosening Performance level in bios ?

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