redux

Good question! I don't think I talked about that too much in the report for the sake of time. As a rule of thumb, sticks tend to stay around the same percentile across tests. Not always, though -- Table 103, breaking down results by PCB model, suggests 6-layer sticks can be above average at 1000MHz CL7, but the same sticks will be well below average at 1333MHz tCL8, due to bad voltage/frequency scaling. Anecdotally, one of the lowest-voltage 1000MHz tCL7 sticks I ever had was a G.Skill Pi 1600 6-8-6 sample on ST-G3U816-B07 6-layer PCB. However, because that PCB kind of sucks for scaling, it was nothing special at 1333MHz (and needed 2T on top of that). But for most, say, G.Skill PSC on 8-layer PCB, you can expect similar results percentile-wise regardless of test. Also, added a mirror to the post.

Hey all, You may know me from the prodigious amount of PSC DDR3 that I binned and sold over the years, maybe some strong air results, but not so much from actual BOT submissions or scores. Although I subbed frequently when I first joined the bot, and went cold a couple of times, most of my time in OC became focused on binning for the sake of better understanding and measuring the limits of what hardware can achieve, not climbing the leaderboards. Basically, I tended to be more research-oriented about OC than competitive. Anyway, my single biggest project was binning PSC, and I always had this idea of creating "The PSC Report," a gigantic summary of all my findings. It took me a long time to actually put it together, but recently I finished it! I published it elsewhere, but I didn't want these findings to only be behind a paywall, so I've put it up for free here: [Public] DDR3 Elpida_PSC 1Gbit Rev.D Overclocking Test Report.pdf [Google Drive mirror. Please let me know if you have issues with access for any reason!] This report details the results of research conducted into the DDR3 memory IC PSC/Elpida 1Gb Rev.D (A.K.A. "PSC" or "BDDG") in the context of competitive overclocking and binning modeling. This includes a brief history, competitive context, and demystification of nomenclature and identification. This is followed by a detailed overclocking test report, containing statistical models gathered at various points across the IC voltage-frequency curve, percentile binning targets, and analysis of the tested memory modules and the effect of characteristics such as PCB model and speed rating on their performance. We hope that these findings will inspire further research into constructing behavioral models of overclocked computer hardware with statistical and scientific rigor. The scientist in me must acknowledge the report is limited and imperfect, (years late to the party ,) and just barely scratching the surface of the world of PSC overclocking. There's so much ground I could not cover, in particular systematically testing subzero results and investigating whether any robust relationship could be measured between ambient and cold. I'm not the first to conduct a mass binning, but to my knowledge, no single, cohesive work like this has ever been attempted in the history of OC. Even if you're not interested in this area of legacy hardware, I hope my work at least demonstrates that as messy as it can be, it is possible to systematically understand overclocking, and you can learn a lot by doing so! For the "screens or it didn't happen" folks, you can find all of my screens, for PSC and otherwise, archived here. Thanks to the Memelords (you know who you are) for their support, as well as all the other overclockers I've interacted with over the years. Now that The PSC Report is done, I can officially retire Thanks HWBOT for the space.

All sold! Thanks to all buyers, and thanks to HWBOT for the space

bump!

offers welcome on hypers

price drops on hypers!

M7I now down to $75

august bump!

bump, price drops

bump!

sick mems

[Everything has sold.] ———————— All DDR3 binning results use 32M unless otherwise stated. No waza unless otherwise stated. All prices are before shipping. Can ship worldwide at buyer expense. PP F&F payment preferred (or G&S +3%). Bank wire transfer / Zelle also accepted. Imgur photos/albums attached for all items. Backup images: wave 1 items, wave 2 items, wave 3 items, all binning screenshots. Old timestamps: 1, 2, 3 SOLD ZONE (Waves 2/3): see here SOLD ZONE (Wave 1)

can be closed, remaining items will be put into a new FS post in the coming days. thanks to all buyers and to HWBOT for the space

bonus item added

final additions for this post: a GA-EP45T-USB3P and a modded MOCF

Bump, added first gen Intel stuff aaand it's sold

final bump of 2023; updated with sales

bump with sales price drops: $175 R4BE $150 L3014 $150 T-REX

Given it's been... six months since I said this and all of my effi testing has been postponed indefinitely, I thought I should at least share my binning results from earlier this year. -------- For those who just want the raw data, I have a spreadsheet here. I have screens for (almost) all results here. Tested on Maximus VII Impact with binned 4790K. Note 2.39V VDIMM cap for 1400MHz CL8 testing in particular. Sample size: 148 sticks, all JEDEC 1333 9-9-9 1.5V rated. Composed of 121x SR (73x Samsung M378B2873GB0-CH9 and 48x Transcend TS128MLK64V3U) and 27x DR (14x Samsung M378B5673GB0-CH9, 13x Samsung M391B5673GB0-CH9). Four tests were used: 1333MHz CL8, 1400MHz CL9, 1400MHz CL8, 1466MHz CL9. At each combination, tightest tRCD and tRP at "any" voltage were found first; voltage was then minimized for these tight settings. Binning recommendations based on these tests: Ability to run 1333MHz 8-11-12 at any voltage (est. top 20% stick). Among sticks that can do these timings, above average sticks can do <2.15V. Voltage for 1400MHz 9-12-13: <2.00V is above average, <1.95V is potentially interesting, and <1.90V is strong (top 10% on this matter). This is good as an easy test, but not as a one-stop binning procedure. Ability to run 1400MHz 8-12-12 at any voltage (est. top 5% stick). If just looking at CL8 scaling, ability to run 8-12-13. Ability to run 1466MHz 9-12-14 or 9-13-13 with tRFC88. Among sticks that can do these timings, above average sticks can do <2.10V. Top tier sticks (top 2-3%?) can do 1466MHz+ 9-12-13. On average, compared to Samsung SR OEM, my Transcend SR OEM sticks seemed to have worse tRFC and tRP scaling, but better tRCD scaling. There's too many factors to point to one specific reason for this -- could be manufacturer binning, PCB, just an artifact of sampling, etc. My luck with Samsung DR OEM non-ECC was very bad, with only about 50% capable of 1400MHz 9-12-13 at all, and a few sticks with subtiming weaknesses. Samsung ECC PCB (M391B5273DH3) does not seem desirable for OC, due to a 1400-1414MHz clockwall and need for +1 RTL versus non-ECC (but RTL binning can help). For anybody interested in an even more granular breakdown: I'd be very curious to see results at this scale for DR sticks, if possible; unfortunately I had a much harder time finding them in large quantities or for reasonable prices versus SR sticks.

time for a 60-day refresh added over a dozen more boards: TUSL2-C bundle, H55N-USB3, P55-USB3, R2E, R3F, R4BE, NF7-S2, another A7N8X-E DELUXE, M863G, GA-K8NE, another nF3 250Gb, A8N32-SLI DELUXE, F1A75-V PRO, and an AM1M-A, plus Socket 370 and Socket A CPUs, some DDR3 and DDR4, and one more AMD CPU tray. more price drops on all remaining 775 boards, A75M-UD4H, and the T-REX pot bundle.

Updated with sales, and price reduction on TPOWERs More stuff to come this week

price drops on most remaining boards

Added P4P800 SE, H57M-USB3, MVF, RVE10, some 478 chips, an Athlon XLT, HOF OC LAB A0 B-die, and one more cpu tray Offers welcome

some stuff sold; further price drop on EP45s

Some price adjustments. 23 sold, 24 reserved.