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Thought it be fun to start memory oc thread on 1156 platform, I've not long been testing this platform but I like it, here's a couple runs I did a while ago on cold PSC. I've spent little more time on it since then and will post some more results with PSC and hypers.

 

All welcome to post some results, if you don't  you know I will 😃let us know your memory and board of choice, I currently using the P55a ud5 Gigabyte and have a P55a ud6 on the way to try 2j6ak35.png2v2imtx.png

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Some of my Hyper runs from nearly a decade ago 

LN2 RAM on mini ITX before it got mainstream :D:D:D

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Edited by TaPaKaH
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Sadly this CPU died from too much VTT (hint: these CPUs die instantly at 1.6V VTT on air, at least mine did) before I could finish my testing (and perhaps get a tuned OS up etc), but I've ran 2000 5-8-5-18 at 1.84V on dual Channel BBSE on air in the early stage of testing a, at the time, new to me BBSE kit (which does 2000 6-8-6-18 at 1.64V) . 

I've recently tried replicating the run with a new CPU (and better efficiency/subtimings), but couldn't get the board to boot cas 5 whatsoever, testing multiple kits even at super low frequency (even 800 5-5-5 refused working on Hypers). I suspect my board is the issue as it has many of those. May retry with older BIOS versions, I think the run was on one of those...

Setup: H55M-UD2H, i5 750, GSkill ReaperX 2200 9-9-9-27

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I used to go mad about IMC binning on this platform, just to be able to do spec with newly-released 2300/2400/2500/2533/2625-rated PSC kits.

I went through a few dozen of i7-8xx and highest I found was 1250. Don't remember how much VTT it took. Also no idea where this CPU is now. I think I sold it at XS, OCX or luxx.

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Edited by TaPaKaH
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Love those pots sam 😎 they look awesome, vtt for me tops out on most my chips at 1.54v -30 CPU 

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Yeah, my 750 kept scaling and I expected it to take similar voltages to 1366 (where I've even seen 32nm batches that took and scaled to 1.7V VTT without caring/degrading at ambient) which it obviously didn't like...

And gotta agree, that setup looks amazing :D

Edited by ground1556
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Ran the 1156 Platform up today....870 ...P55a Ud5 with cold PSC....Memory temps ranged from -110 to -140....little more learnt today :)

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All the ice. :D  Also, 2820C7. 😮

Why RCD 9 for the 2400MHz runs though?

Edited by Noxinite
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10 minutes ago, Noxinite said:

All the ice. :D  Also, 2820C7. 😮

Why RCD 9 for the 2400MHz runs though?

Was untested cold memory and memory wasn't fully prepped correct, you know heatsinks on. also keep dram volts little low.....When I run again ill use correct pot and memory with no Heatsink on. it should do trcd 8 then and maybe at 2500Mhz....got to save some stuff for improvements later hey? ahahahha

 

Is quite possible that memory was under -100 as I had the probe in the top of the memory heatsink lol

Edited by Bullant
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Been checking through some scores on the 32nm chips and I've observed something vaguely related to memory - few people are running high QPI, but it actually makes a massive impact. My own example is R15, but looking at @Bullants 32m Score on his 540 confirms this.

link cb score cb % core core % dram Timings dram % QPI clock QPI %
https://hwbot.org/submission/4039667_ground1556_cinebench___r15_core_i3_540_410_cb 410 100.00% 5379 100.00% 1024 7-9-7 100.00% 5123 100.00%
https://hwbot.org/submission/2509986_joe90br_cinebench___r15_core_i5_670_408_cb 408 99.51% 5687 105.73% 842 9-9-9 82.23% 4213 82.24%
https://hwbot.org/submission/2493991_der8auer_cinebench___r15_core_i3_560_436_cb 436 106.34% 6075 112.94% 971 7-7-7 94.82% 2916 56.92%
https://hwbot.org/submission/2476431_michel90_cinebench___r15_core_i3_550_413_cb 413 100.73% 5711 106.17% 952 8-11-8 92.97% 2855 55.73%
https://hwbot.org/submission/3377198_kintaro_cinebench___r15_core_i3_550_417_cb 417 101.71% 5757 107.03% 720 6-6-6 70.31% 3838 74.92%
https://hwbot.org/submission/2474297_topdog_cinebench___r15_core_i3_550_406_cb 406 99.02% 5649 105.02% 706 6-7-6 68.95% 2624 51.22%
https://hwbot.org/submission/2665450_ue50_cinebench___r15_core_i3_540_405_cb 405 98.78% 5451 101.34% 948 8-11-8 92.58% 4740 92.52%

Of all these scores only the bottom one is somewhat close in efficiency, but its also the only one with fairly high QPI clocks. The same applies to 32m, that can be easily seen by just looking at the 32m rankings for the i3 540 :D

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Yeah qpi gives good boost on the "i3" chips but don't expect to see 350-400mhz boost in eff from qpi like seen in the 32m results 🙂

Edited by Bullant
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Actually, QPI was known as the method to improve clock-per-clock efficiency on Clarkdale since its introduction :)

It has to do with memory controller and core sitting on physically separate dies with QPI being the clockspeed of the bus between them. This also explains why Clarkdale is so terribly inefficient compared to contemporary Lynnfield / Bloomfield / Gulftown, all of which have IMC and core on the same die.

Edited by TaPaKaH
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Like Sam said, this was probably known by anyone when Clarkdale was benched hard. Just take a look at the i5 670 32M ranking for example.

Edited by Don_Dan
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I was mostly looking at the top scores for the i3s, where the QPI is usually quite slow from what I've seen... 

(are there no spoilers? :( )

https://hwbot.org/submission/2572691_der8auer_superpi___32m_core_i3_530_7min_8sec_937ms 3.2 QPI
https://hwbot.org/submission/969132_jabski_superpi___32m_core_i3_530_7min_7sec_625ms 4.66 QPI
https://hwbot.org/submission/979342_sacha35_superpi___32m_core_i3_530_6min_59sec_656ms 4.3 QPI

https://hwbot.org/submission/4053113_bullant_superpi___32m_core_i3_540_6min_59sec_375ms 5.3 QPI
https://hwbot.org/submission/969146_hicookie_superpi___32m_core_i3_540_7min_1sec_735ms 3.6 QPI
https://hwbot.org/submission/969762_lodewijk1978_superpi___32m_core_i3_540_7min_3sec_156ms 3.7 QPI

https://hwbot.org/submission/2503366_strunkenbold_superpi___32m_core_i3_550_7min_28sec_531ms 4.81 QPI
https://hwbot.org/submission/2776005_wanted_superpi___32m_core_i3_550_7min_25sec_812ms 4.5 QPI
https://hwbot.org/submission/2776005_wanted_superpi___32m_core_i3_550_7min_25sec_812ms 5.1 QPI

https://hwbot.org/submission/971207_hicookie_superpi___32m_core_i5_650_6min_37sec_78ms 3.9 QPI
https://hwbot.org/submission/968980_ekky_jengkol_superpi___32m_core_i5_650_6min_43sec_219ms 4.3 QPI
https://hwbot.org/submission/968980_ekky_jengkol_superpi___32m_core_i5_650_6min_43sec_219ms 4.4 QPI

https://hwbot.org/submission/2226249_cl3p20_superpi___32m_core_i5_660_7min_14sec_625ms 4.3 QPI
https://hwbot.org/submission/959023_topalof_superpi___32m_core_i5_660_7min_1sec_140ms 3.2 QPI
https://hwbot.org/submission/962339_3oh6_superpi___32m_core_i5_660_6min_11sec_438ms 5.34 QPI

https://hwbot.org/submission/964253_hiwa_superpi___32m_core_i5_670_6min_8sec_859ms 4.6 QPI
https://hwbot.org/submission/968355_nickshih_superpi___32m_core_i5_670_6min_2sec_625ms 4.9 QPI
 

From 17 top 3 results, a whopping 3 are above 5GHz QPI, not even half above 4.5 which appears a little odd from the above mentioned. Just found it weird when my random-ish chip (best out of a dozen chips) manages 5.1 easy on dice...

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Yeah my couple i3 chips do 5.3 at -30, not tested water.....i know also after now testing one other board that there is a big difference in qpi scaling....my same chip can't do as high qpi as in my current board. So I'll prob look to find some other cheap boards to try 

Edited by Bullant

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I wonder if 3000mhz memory is possible cl7-8, might chuck on the ek memory pot soon to see how far it can go 😁

Edited by Bullant
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