Core i7 Overclocking by Batch #

[hetsaq]

Good day guys. I have a new contribution. She cooks so I am not entirely sure it is worth it at the moment, but here is a quick test. Batch #3910A372. *updated 7/26/2009*

Voltage changes:
CPU 1.26 in the bios
QPI 1.35
DRAM 1.66
CPU PLL 1.88
HT On
Turbo Off




Asus P6T Deluxe V2
OCZ Platinum 12800 3X2GB 7-7-7-23
Coolermaster V8 Heatsink

[LiberalElephant]

Is it just me, or does it appear that the 39xxx chips are a bit worse than the 38xxx chips?

[nyeah]

Is it just me, or does it appear that the 39xxx chips are a bit worse than the 38xxx chips?

well, it's a new batch, who knows? maybe after this someone will find a good 39xx batch.
or just buy the 38xx, it will a safe bet.

[phsinc1]

Good day guys. I have a new contribution. She cooks so I am not entirely sure it is worth it at the moment, but here is a quick test. Batch #3910A372.

CPU 1.275 in the bios
HT On
Turbo Off



Asus P6T Deluxe V2
OCZ Platinum 12800 3X2GB
Coolermaster V8 Heatsink

What is your QPI/VTT voltage?

[LiberalElephant]

well, it's a new batch, who knows? maybe after this someone will find a good 39xx batch.
or just buy the 38xx, it will a safe bet.

I was thinking that possibly Intel was using the 920's to roll out the d0 stepping and they weren't binning the silicon, hence you would have some 975 quality 920's in the earlier batches. Intel was probably still binning them and I am probably wrong, but it was just a thought

[hetsaq]

Post updated for you Elephant.

[PatRaceTin]

oh hetsaq your temp is in danger zone

in my experience batch 38 is generally better than batch 39

my lastest cpu (after playing around 2 weeks and i sold it today)

3852A328

[Vega]

I have not seen so many 39xx chip yet, I will receive a 3912A888 this week. So far 38xx appear to oc better but I think it is to early to say, right?
Any difference in bclk or memory handling?

[sodina]

temp seems little high even with the v8 cooler.

[LiberalElephant]

I have not seen so many 39xx chip yet, I will receive a 3912A888 this week. So far 38xx appear to oc better but I think it is to early to say, right?
Any difference in bclk or memory handling?

You're probably right, it probably is too early to say. I think I am just trying to see patterns within the 38xxx chips when there really aren't any patterns to be seen.

[ben805]

Anyone else has result from batch 3844A717??

[nyeah]

temp seems little high even with the v8 cooler.

your temp is dangerous mate, try reseat the cooling/ reapply the TIM.

[roller11]

I was thinking that possibly Intel was using the 920's to roll out the d0 stepping and they weren't binning the silicon, hence you would have some 975 quality 920's in the earlier batches. Intel was probably still binning them and I am probably wrong, but it was just a thought

Right, this is something I figured out long ago to explain the counter intuitive "later is worse" observation we see everytime a new chip is released.
It seems like as the process matures, Intel learns more yet the chips slow down, each batch is worse than the previous batch. How can this be? WHen the 920 D0 first came out, there was no w3540 or i7 950, only the 920 D0 so every chip was labeled "i7 920 D0" even the ones that had greatly superior AC characteristcis, the 'golden' chips. Later, those same golden chips were labeled w3540/950 and Intel charges twice as much.
So it isn't that the chips slow down, it's that all the good 920s are being screened out and only the slower ones are labled 920.

[hetsaq]

I will try again with the seating this week.

[phsinc1]

@hetsaq, try OCCT CPU Stress test 3hours Not the linpack and check if you are stable, works better for me than prime95 and LinX

[hetsaq]

I will try that. I just re-applied the heatsink and goop. Temps are already about 6-7 degrees lower under load.

[imUnStoppable]

i believe im getting a batch 3910 this week..as soon as i get everything reinstalled ill do some testing to see what she can do..hope they arent worse then the 38s

[Dahmer]

Update for 3851A262 :
old setup turbo off, multi 20x & bclk 200 -> good for 4 GHz obviously needed vcore of 1.4V set in bios (1.344 stressed cpu-z)
new setup turbo on, multi 21x (with turbo) & bclk 191 -> good for 4 GHz again but now only needs vcore of 1.31V set in bios (1.264 stressed cpu-z)

So it's not such a bad chip after all....20x just ing sucks :s

[fu bar]

Batch: 3845B271
CPU : 920
Cooling: TRUE BLACK (push/pull)
MOBO :P6T V1

max clock on air was 4.646 GHz

[Rcdriver]

Anyone else has result from batch 3844A717??

Hello everyone, first post here. I was just about to comment asking if anyone has some experience with this batch #. Got mine at Microcenter last thursday, boxed 2/20/09. Is this a good batch #?

[Chicken Patty]

good job fu bar, especially on air. Oh, and next time move the windows out of the way. I like to see peoples wallpaper

[JakFrost]

I have not seen so many 39xx chip yet, I will receive a 3912A888 this week. So far 38xx appear to oc better but I think it is to early to say, right?
Any difference in bclk or memory handling?

My processor Intel Core i7 920 revision D0 batch 3901A238 from Costa Rica, 2009, week 01 is limited to BCLK 180 stable at 1.20 V. Not a good batch at all.

XtremeSystems - Core i7 Overclocking by Batch # - Page 12 - Post 718

HardOCP Forum - Overclocking Air: Intel i7 920, Asus P6T, G.Skill DDR3-1600 C8, Xigmatek HDT-1284E

[Andrea deluxe]

3845b228= 4ghz 1.232v

[jcniest5]

@fu bar, what's the pack date?

[Din83]

3849A960 - 4ghz @1.23V Stable