ground

very carefully dremel the backside of a single sided dimm to expose the gnd plane. Just as carefully dig with the dremel one layer deep to expose the vdimm plane for the second pad. Cover exposed gnd with soldermask accordingly. https://imgur.com/a/trying-to-achieve-ddr3-4000-on-x58-rHGRQn0

Yeah, I did that a while ago. I would have thought with maxmem active that would at best allow posting higher settings, but I can try next time I have LN2 on hand.

Was already running 64MB maxmem, didn't try lower. SPD edit in which sense you mean? Max bootable on this config is around 1840MHz.

the loosest timings you can run on x58 are 11-15-15-31 with trfc 255, MFR is out for that mainly due to trfc.

Tried again a couple days later. Got 1992MHz at least 6 times across multiple boots, yet not a single time managed any higher. Something is walling hard again. Vdimm doesn't matter 2.3-2.6V, VTT doesn't matter 1.45-1.55V, dram vtt 0.95-1.2V. CPU temp -60 to -80 no difference either, so suspecting either board or mem to blame here.

tried same setup again today. Saw 1992 at least 6 times again within an hour, yet never saw any higher. Could basically adjust anything (within reason) but saw no improvement. Hoping for IMC limit but suspecting stick limit.

give me a way to run looser timings and we talk again Believing I'm limited by trp.

3700 isn’t platform limit of x58, seems like it was just the limit of my memory sticks at the time. Last week, Tagg Shaggy and I were building some custom Hypers and in the process also decided to take apart the best 3 sticks of DDR3L ECC gdie I had and slap the best ICs in order on new better PCBs. First try with best stick of the lot (2948 trp 12 binned air) - 3780. Rather disappointing improvement. Took 2nd best stick (~2900 trp 12 air) and a different IMC on LN2 and relatively easily got to ~3820 Added capacitors to the back (2x 330uF) and got to 3880. After that, took the best stick, added capacitors and threw it on my good IMC on LN2, and got far to close to 4000 to not try again next couple days. https://hwbot.org/submission/5631354

Really nice chip and great work! Not possible to disable hyperthreading on these? Maybe via boot.ini? Or do these not care?

Handbinned memory ICs, KO-8154 with capmods. Couldn’t quite get the 4000 wall today, will try again tomorrow. IMC binning barely requires - 1 W3680 walls at 3780, this one’s wall not found yet.

https://imgur.com/a/VZCouIh more info on how these sticks were manufacturered.

Need 18x multi working and mem that can run 11-15-15 at those clocks. Will probably have to start binning IMCs now, while 3700 didn’t feel like IMC limit, this did. Though this chip was a lot less happy at high vtt on Ln2 then my other, so I’ll have to try with that CPU again.

the 448 is big fermi die though

when I tested on flaming blade and bloodrage I couldn't get anything lower then 2:3 working on 32nm. Expecting similar behavior with 45nm walling at 1:2. I never bothered testing for prime95 since full stability isn't relevant to me on this platform. For me, 1:1 never worked properly, 1:1 with uncore+1 worked a bit better, 2:3 works fine and much more stable until uncore limited. Below 2:3 I couldn't stabilise 32M, 1M would run just fine, even at 3500+ (never tested on LN2 but not expecting changed behavior. Keep in mind - until 2 1/2 generations later (Ivy bridge E) nothing intel is able to do 3200+ besides insanely binned Lynnfield and 1366. Trying to find memory that will do 3500+ at 11-15-15-31 is also quite limiting. I'd love to try in a fresh x58a-oc, the socket on mine is badly corroded and the board is generally in rough condition, given I'm the third owner who has ran it multiple times on LN2. 5000 series xeons are all locked to 10x mem multi or even less. 5500 series even has hard lock on uncore multi, can't even change it on most boards.

the better two were doing 2800 8-11-12-13 tight at 2.3V. Other 2 2760 8-11-12-13 2.3V. My best non-ECC sticks are doing 2720 at the same settings. Edit: all 32M

@somerandomtechyboi I have done the same on x58a-oc with W3680 a while ago, see https://hwbot.org/submission/4783471_ground1556_memory_frequency_ddr3_sdram_1856.5_mhz/ Ambient limit was just under 1800Mhz: https://hwbot.org/submission/4641400_ground1556_memory_frequency_ddr3_sdram_1794.6_mhz/ Have seen as high as almost 1900 on LN2: Was able to reproduce 1856 valid with 2 different CPUs and 3 memory sticks, suspecting board is limiting me at this point. https://valid.x86.fr/4dv07t different CPU, same (valid capable) clockwall again. The socket on my x58a-oc is in horrible condition though, so that might be to blame. Dual channel stability on this platform is pretty easy, even above 3000. Pushing triple channel towards 3000 is very hard though. Triple channel max valid: http://valid.x86.fr/abc7xf triple channel max 32M: Dual channel max 32M: Got very close to a pass at 1550Mhz, but ran out of dice at that point sadly. Edit: I also tested some ECC gdie at some point, some sticks were way better regarding voltage requirements but all hardwalled for frequency around 3200-3300, suspecting PCB.

Maybe H55M-UD2H from over 10 years ago?

x58 does not work at all with the inner slot per channel. Innermost channel is best for coldbug.

I didn't even know that R2E's this bad existed before our session 😂 Board becomes super laggy -> Board limit with ambient NB. LN2 gains at least 7 MHz with the 3 boards we tested, though I think its more like 10 with my board and suspecting CPU limit with both of your boards. PCIe voltage also scales on LN2, 1.5V -> 1.6V got me from 132 hard limit to 141+, didn't bother testing further yet.

Was a very fun session! Soooo close! Gogogo!

it should open a menu right under the report button where you can select why you are reporting a score and give you a small text field where you can add extra info.

Absurd clocks and FSB for a 65nm quad

pifast is a single core bench.

sadly 3:5 :( http://www.xtremesystems.org/forums/showthread.php?199241-3-5-divider-on-X38-P35-X48-P45-is-broken-is-2-3-in-reality-on-400-strap

This is just plain absurd on an R3E...