2500K w/4x 8GB?

[WhoBeDaPlaya]

Was running a 3570K on an Asrock Z77 Pro4 just fine with 4x 8GB of Corsair Vengeance 1600 RAM, everything at stock.
Decided to switch to a 2500K instead and the system won't POST if any of the 8GB sticks are installed in the first two DIMM slots.
A little stumped 😵


Notes :
1) Brand new CPUs (both the 3570K and 2500K)
2) Brand new RAM (tried two sets - Komputerbay and Corsair, both CL10 1.5V 4x 8GB)

Tried :
1) Changing motherboards (both new)
2) Increasing VCCSA (1.1V, 1.2V)
3) Increasing VDIMM (1.55V)
4) Tried all BIOS versions (1.0, 1.1, 1.2, 1.4)
5) Tried all 8 sticks of RAM in first two slots


Any ideas?

 

[Yuriman]

Boot with two sticks, loosen timings and set command rate from 1T to 2T and then put your other two in.

Only thing I can think of.

 

[WhoBeDaPlaya]

Tried that, no dice.
The manager at the local MC was kind enough to let me try a bunch of different RAM in it (2GB, 4GB, 8GB sticks) and still no dice. I'm starting to suspect that I somehow have a bum 2500K. It's almost as if one of the channels on the IMC is defective.

 

[soccerballtux]

couldn't that be mobo related as well? there was a chipset voltage somewhere I had to adjust to get 4 DIMMs to work right overclocking on my current AMD board.

 

[WhoBeDaPlaya]

couldn't that be mobo related as well? there was a chipset voltage somewhere I had to adjust to get 4 DIMMs to work right overclocking on my current AMD board.

That would be fair enough, but somehow, slots A1 and B1 won't post if something is in them (2GB, 4GB, 8GB stick).
I can run 8GB DIMMs in slots A2 + B2 together all day.

Unless my luck with Asrock is _that_ bad (second board already from MC). Maybe I should have just stuck with Gigabyte :|

 

[Arkaign]

I've had a rash of problems with Vengeance 2x4GB packs lately, in both 1600 and 1866 speed. I was able to get one set stable with 1.57V, but the four other packs were not stable. All bought at TigerDirect store here in North Dallas. This was with a Sabertooth Z77 and a Gigabyte Sniper 3 Z77 mobo.

Replaced with Kingston 4x8GB 1600 memory, no problems yet.

 

[WhoBeDaPlaya]

Finally figured out what was going on. The CM 212+'s standoffs were somehow shorting some traces, even though there were washers underneath them.

It's my bad really. I usually put small pieces of tapes around the HSF mounting holes just in case, but of course neglected to do so this time around.

 

[thilanliyan]

I'm glad you didn't fry anything.

 

[tweakboy]

Probably the motherboard. You tried 2 cpus in it already, its not CPU.

Also is might be PSU. gl



But I think your just have timing issues and voltage for mobo or CPU. gl

 

[WhoBeDaPlaya]

I'm glad you didn't fry anything.

Me too 🙂
Which is why I usually tape off the mounting hole areas even though I'm using washers with the HSF standoffs.

The one recent time I didn't (this time), it really did bite me in the ass.

 

[djnsmith7]

Glad you figured it out. Figured you would. Didn't sound like anything was defective. Just needed some more detective work.

 

[Gigantopithecus]

I usually put small pieces of tapes around the HSF mounting holes just in case, but of course neglected to do so this time around.

:thumbsup: Glad you figured it out. I usually put electrical tape over the mounting holes and then punch through them with the screws.

Took me a lot longer to figure out that issue the first time it happened than it took you, apparently, haha. Fortunately I didn't fry anything either, though.

 

[WhoBeDaPlaya]

Glad you figured it out. Figured you would. Didn't sound like anything was defective. Just needed some more detective work.

Heh, well I guess I did catch up big time on all these new SB/IB shennanigans (VCCSA, etc.) :biggrin:
Putting the 2500K through its paces right now (and already ran into the infamous idle bug) - 50% LLC (fixed the idle bug), -0.005V offset, 46x, IBT stable so far (~1/2 hour) and only hitting 63C.