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[F3-16000CL6D-4GBPIS] [3GHz CL6] ASUS C5F/M5E + G.Skill 2000C6 + KPC Ney pro


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I had some experience of PSC overclocking under subzero temps two years ago, but it was done the ghetto way - without any RAM pot, just using aluminum foil:

 

01aluminumfoilramcoolin.jpg

 

Temps was not good at all, I only got around -30C...-35C (measured from thermocouple attached near RAM IC).

Anyway, my Lynnfield was BCLK-limited, so I stuck to 2908 MHz no matter what cooling.

 

I was surprised so much teams used LN2 cooling for RAM on AOOC 2012, so I decided it's time to move forward and ordered RAM pot as well as my new CPU pot:

 

02kpcvenomandneypro.jpg

 

Now I only have my old Hyper kit (very good on any platform, but no go with Ivy Bridge) and one samsung kit for daily usage and some 3D.

Both is not the best choice for subzero, I guess.

That's why I took G.Skill 2000C6 PIS kit (F3-16000CL6D-4GBPIS based on X-Series PSC ICs) from my teammate to test with KPC Ney pro memory cooler.

 

I quickly test this RAM kit on air with 3770K and it was nothing special - 2600 9-12-9 for 32M or so.

 

Max clock test bed:

- AMD FX-8120

- ASUS Crosshair V Formula

- G.Skill F3-16000CL6D-4GBPIS

- Palit GeForce 7300GT Sonic

- Corsair Neutron GTX

- Corsair AX1200

 

SuperPi 32M test bed:

- Intel Core i7-3770K

- ASUS Maximus V Extreme

- G.Skill F3-16000CL6D-4GBPIS

- ASUS MATRIX-HD7970-P-3GD5

- Corsair Neutron GTX

- Corsair AX1200

 

Preparation:

 

I remove the heatspreaders from ram kit using hair dryer and some old plastic card.

Then cleaned ICs from glue with acetone and cover both sides with rubber eraser to protect from condensation and for better contact with pot plates and better heat transfer.

 

03gskill2000c6pisln2rea.jpg

 

ASUS motherboards was covered with rubber eraser:

 

04asusm5eln2ramocreadyt.jpg

 

KPC Venom and Ney Pro was insulated with thin sticky dielectric tape and Armacell Armaflex self-adhering insulating tape:

 

05kpcvenominsulated.jpg

 

06kpcneyproinsulated.jpg

 

Arctic Cooling Ceramique thermal paste used between memory ICs, plates and RAM pot:

 

07acceramiquethermalint.jpg

 

Voltage / temp scaling:

 

PSC scales quite well with voltage and temperature.

This G.Skill 2000C6 PIS kit scales up to 1.80V-1.85V on air cooling.

For subzero temps it runs fine at 2.10V-2.15V.

No CB or CBB, so it was easy to bench without needs to control temperature.

 

Temps - T1 for CPU and T2 for memory:

 

08cpuandramtemps.jpg

 

Testing results:

 

FX-8120 was tested before for CPU_NB overclocking and it is good for up to 3600 MHz.

Bus speeds around 300 MHz was also not a problem.

I expected some high memory frequency validation, but I got only 3100 for dual channel and 3130 MHz for single channel.

 

3130 MHz 11-14-14-35 2T 2.10V -170C Single Channel: http://valid.canardpc.com/show_oc.php?id=2788041

 

09gskill2000c6pis3130mh.png

 

May be this CPU can't do high CPU_NB, bus and memory clock at the same time, IDK.

 

Ok, what about 3+ GHz with tight timings?

 

3058 MHz 7-11-7-27 1T 2.10V -170C Dual Channel: http://valid.canardpc.com/show_oc.php?id=2789955

 

10gskill2000c6pis3058mh.png

 

3010 MHz 6-10-6-27 1T 2.10V -170C Dual Channel: http://valid.canardpc.com/show_oc.php?id=2788195

 

11gskill2000c6pis3010mh.png

 

Not sure what is current WRs with CL6 and CL7.

I did quick search the web and found some old results was done with Kingston memory and Lynnfield CPU:

http://ocaholic.ch/modules/smartsection/item.php?itemid=609&sel_lang=english

The difference that it was done in single channel and high tRCD/tRP.

 

Semi-stable clock for booting windows and run some benchmarks with 6-10-6-27 timings was around 2800 MHz:

 

SuperPi 1M @ 2817 MHz 6-10-6-27 1T 2.10V -170C Dual Channel:

 

12superpi1m2817mhz61062.th.png

 

Cinebench R11.5 @ 2804 MHz 6-10-6-27 1T 2.10V -170C Dual Channel:

 

13cinebench2804mhz61062.th.png

 

FX-8120 is too slow for SuperPi 32M and I changed testbed to 3770K for this bench.

 

SuperPi 32M - 6.17.219 @ 2501 MHz 6-9-5-22 1T 2.15V -170C Dual Channel:

http://HWBOT.org/submission/2377941

 

14superpi32m2501mhz6952.th.png

 

SuperPi 32M @ 2500 MHz 5-9-5-20 passed 15 loops and failed (no waza):

 

15superpi32m2500mhz5952.th.png

 

Booting at 2600-2700 6-10-6-27 was not a problem, but not stable enough to pass 32M.

 

Hope I will test this memory kit with Haswell soon, to see if it goes for higher clocks.

 

Some frosty pics:

16gskill2000c6pisln2ben.jpg

 

17gskill2000c6pisln2ben.jpg

 

18gskill2000c6pisln2ben.jpg

 

19gskill2000c6pisln2ben.jpg

 

20gskill2000c6pisln2ben.jpg

Edited by S_A_V
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Cas 5 is bugged unless you can get tWCL 5 to run, but the 2500 6-9-6 time is very nice.

Tried to set tWCL 5 in BIOS and got error code 55.

Also noticed that 6-9-6 tWCL 6 was faster than 5-9-6 tWCL 6 (on first loops, both runs with waza).

How are you getting the dimms that cold or is that pot temp you are measuring?

Yes, it's pot temp. Next time will try to install second probe directly to memory module.

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intresting way of using the ney pro, how do you manage a tight fit on the sticks? I always feel as hard as I try they are still fairly loose surrounding my memory heat spreaders.

 

Not sure what you mean, Allen. May be this scheme and couple of pics will explain it better:

 

neyproscheme.png

 

03kpcneyproinsulatedbot.jpg

 

06kpcneyproplate.jpg

 

Very clean insulation and interesting results! How much Vdimm for the 5-9-5-20 @ 32M try?

2.15V was for both 32M runs

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Not sure what you mean, Allen. May be this scheme and couple of pics will explain it better:

 

neyproscheme.png

 

03kpcneyproinsulatedbot.jpg

 

06kpcneyproplate.jpg

 

 

2.15V was for both 32M runs

 

ahh I think I see now, what I mean is with the ney pro I find it hard to tighten the plates around the memory. perhaps the eraser is helping you hold it to the sticks while you tighten :)

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