F3-14900CL9-4GBSR unable to run at 1866 w/o excessive voltage

[Baenwort]

MB: Gigabyte P67A-UD3-B3 Rev 1.1 with F4 bios(latest official bios)
CPU: Intel 2500K(stock)
GPU: ATI 6950
PSU: BFG ES-800(a high efficiency 800W PS)
Ram: G.Skill SniperX F3-14900CL9-4GBSR(2x4GB kit)

I am unable to successfully complete memtest86+ 4.20 at any of the default memory profiles with out raising the voltage and I am unable to run with XMP Profile1 (the 1866 speed) at any reasonable voltage.

I have attempted with both the ram timings in auto and manually set to the values stated in the respective memory profiles and had no change as to the voltages required. I have also tested with the sticks in both pairs of slots and singly with out being able to decrease the voltages and not receive errors. I can run both sticks singly at DDR3-1333 with all voltages set to defaults but not both sticks together.

For the DDR3-1600 JEDEC#3 profile I have to use a Vtt(VccIO) voltage of 1.10 and a VccSA(System Agent voltage) of 0.945 to be able to complete a run of memtest86+.

For the DDR3-1866 XMP-1866 profile I had to use a Vtt(VccIO) of 1.22, a VccSA of 1.11, DDR Voltage of 1.55, Data Vref of .8, and a Address Vref of .8 to not have errors.

I spent 1/3 more money over a DDR3-1600 set in order to be able to run at 1866 without having to unduly increase the applied voltage(to reduce wear) and find it hard to believe that I would need to increase voltage this far beyond the XMP profile unless something is wrong.

[Tradesman]

The F% BIOS might have a fix for this DRAM they've been working onmemory fixes for awhile , might give it a try, it's been there, but think they just officially released it last week....hang a sec,,,,,OK can find it on their website here:

http://www.gigabyte.com/products/pro...?pid=3765#bios

Released last Sat

[Baenwort]

The F% BIOS might have a fix for this DRAM they've been working onmemory fixes for awhile , might give it a try, it's been there, but think they just officially released it last week....hang a sec,,,,,OK can find it on their website here:

http://www.gigabyte.com/products/pro...?pid=3765#bios

Released last Sat

That is interesting. When I checked on the 25th prior to commencing this build the latest official BIOS was F4 and the F5f bios was still a beta bios on the site. I will give the F5 bios a try although according to your web page this MB was supported officially by you before the release of the F5 BIOS so I don't see why this would fix anything from the F4 BIOS that would increase compatibility.

[Tradesman]

Sorry about the typo (% instead of 5), testing can be affected by a number of things, i.e. might have been tested w/ a 2600 or 2600K, PSU might be looser or tighter on exact voltages.....could even have something to do w/ the specific parts used on a mobo or DRAM i.e. One manufacturer recently had numerous problems with their mobos going into a power on/off cycle - turned out they made a bunch with some overly tight DIMM sockets, have since changed suppliers

[Baenwort]

Sorry about the typo (% instead of 5), testing can be affected by a number of things, i.e. might have been tested w/ a 2600 or 2600K, PSU might be looser or tighter on exact voltages.....could even have something to do w/ the specific parts used on a mobo or DRAM i.e. One manufacturer recently had numerous problems with their mobos going into a power on/off cycle - turned out they made a bunch with some overly tight DIMM sockets, have since changed suppliers

I have updated to the F5 bios and am now unable to pass memtest86+ 4.20 at 1866 with the prior voltages. I do not feel comfortable raising them any higher. I am still able to pass at 1600 with Vtt(VccIO) increased one notch from the prior levels but am unable to pass at the prior voltage levels.

I have tried with both auto(JEDEC #3 and XMP Profile 1) and manual settings for all memory settings along with the Blck set to auto and also manually set to 100.00 Mhz.

[Tradesman]

What's the vCore at? If running stock, might up it to 1.25 am guessing currently around 1.1 -1.2 (possibly even less)

[Baenwort]

What's the vCore at? If running stock, might up it to 1.25 am guessing currently around 1.1 -1.2 (possibly even less)

1.30 is the Vcore currently as I plan to see how high I can go at my max comfortable Vcore once I get the memory straightened out. I don't plan to push the memory at all but I'd like to get what I paid for out of it.

I tried increasing PCH Core and CPU PLL two clicks each when the old voltages did not work after the F5 BIOS update but I currently have them running at the stock of 1.05 on PCH Core and 1.80 on CPU PLL.

[Tradesman]

Strange, may want to wait and see what GSkill has to offer, they'll be back Monday, is there another system you could try the sticks in or do you have access to other sticks you could try?

[Baenwort]

Strange, may want to wait and see what GSkill has to offer, they'll be back Monday, is there another system you could try the sticks in or do you have access to other sticks you could try?

No to both. The only other systems I have access to use DDR or DDR2 memory. I don't want to abuse anyones return policy by purchasing sticks that I have no intention of keeping.

[Tradesman]

Maybe GSkill will have something

[Baenwort]

Any ideas?

[Tradesman]

Doesn't look like they were out today, hopefully Wed....has me stumped...might be mobo or the sticks - have you tried 1.575 DRAM voltage? I've used a number of Sniper sets and haven't had any problems with any

[GSKILL TECH]

Feel free to send them in for RMA to see if a new kit works better. This kit should work with just XMP enabled.

Thank you
GSKILL TECH

[Baenwort]

Feel free to send them in for RMA to see if a new kit works better. This kit should work with just XMP enabled.

Thank you
GSKILL TECH

Do you guys have any kind of cross shipping policy?. I don't want to go without my system for a week. I am willing to put some money down as good faith.

[GSKILL TECH]

Sorry, we do not have this option.

Thank you
GSKILL TECH