Core i7 Overclocking by Batch #

[Lu(ky]

i7 920 D0 3910Axxx
DFI DK X58
Trident 12800 CL6
Enzotech Luna, XSPC RX360. MCP355

Nice, seems like the 3910A batches are hit and miss. What is the full batch number?

3910A778

Sweet I hope mine will do the same. Not bad 2 great batches here for me now.

[eva2000]

How's your chip doing? I have exactly the same one- but not sure my board is doing it justice....

Started testing this newest member of my week 45, 2008 batch family - i7 920 3845B260 cpu. Nice temps although 4Ghz prime95 mark vcore required is slightly higher than my other cpus.





System:

• Intel Core i7 920 3845B260
• EK Supreme LT 1366 / FESER 480 / MCP655
• Asus P6T6 WS Revolution
• Gskill Trident F3-16000CL9T-6GBTD
• 512MB Inno3D 8800GT OC Edition 190.62WHQL
• 750GB Samsung SATA
• Pioneer DVR-217 DVD-RW
• Corsair HX1000 PSU
• Dual Boot - WinXP Pro SP3 (nLite fully updated) with Vista Theme & Win7 Ultimate 64bit RTM

4Ghz Prime95 Comparison results

• W3520 3845A935 - 4ghz HT enabled at 1.184v
• W3540 3845B010 - 4ghz HT enabled at 1.168v
• i7 920 3845B260 - 4ghz HT enabled at 1.216v

i7 920 3845B260 default auto vcore and 4Ghz 1.216v Prime95

[angelreaper]

Xeon 3520 batch - 3845A935

[uranium]

Started testing this newest member of my week 45, 2008 batch family - i7 920 3845B260 cpu. Nice temps although 4Ghz prime95 mark vcore required is slightly higher than my other cpus.

Thanks for that- will be interested to see further progress

My 3845B260 does 4.2 @ 1.244 full load, LinX stable etc. Have serious problems with my GB Extreme above BCLK 210-215, despite my best efforts. Went all the way up to 222 easily on a friends EVGA 758 board, so may get one of those...

[eva2000]

Nice angelreaper you got exact same batch as my w3520

uranium, your cpu looking good is that with peltier-chilled H20 ?

Next stop 4.2Ghz at 1.288v. i7 920 3845B260 seems to be one of those higher vcore low temp cpus - it runs around 0.05v higher vcore than my Xeon 3845 cpus but runs around 3-5C cooler than my W3520 3845A935 and around 10-13C cooler than my W3540 3845B010 at same clock speeds even with higher vcore requirements!

[angelreaper]

Nice angelreaper you got exact same batch as my w3520

Thanks Man
This chip is crazy

[uranium]

uranium, your cpu looking good is that with peltier-chilled H20 ?

Yes it is Keeps the CPU at low 50s C running LinX at 4.2 GHz
Peltier set-up is here, in case you are interested:

http://www.xtremesystems.org/forums/...d.php?t=230755

[Sam_oslo]

...
Next stop 4.2Ghz at 1.288v. i7 920 3845B260 seems to be one of those higher vcore low temp cpus - it runs around 0.05v higher vcore than my Xeon 3845 cpus but runs around 3-5C cooler than my W3520 3845A935 and around 10-13C cooler than my W3540 3845B010 at same clock speeds even with higher vcore requirements!

You got a good 45-lineup there
Up to 13'C difference at the same speed, sounds like a shame for that b-batch w3540. This is an important discovery, and maybe we need a new Vcore/temp ratio for judging the i7-batches.

[imo]

Thanks Man
This chip is crazy

Hmm if thats creazy then what it is? sick?

[angkies]

update result

Test on R2E 1504 bios
i7 920 D0 3910A778 1.1v VID
Trident 12800 6-7-6-18

[imo]

Got my self another Batch 3849A914 ... not too shabby ...





Managed to boot in to windows and grab the validation 4700 MHz @ 1.49v
Perhaps theres more in it with water....I sense 5 GHz

Core i7 920 D0
Batch 3849A914
4700 MHz @ 1.49v

[WCRF]

Xeon 3520 batch - 3845A935

+1

[Hellmann]

Lindasso Wagner hahahha,Congrats my Friend

[namegt]

i7-920 [3849A837]

CPU: i7-920
Mainboard: DFI UT X58 T3eH8
RAM: G.SKILL DDR3 6G PC3-16000 TRIDENT 2x3G
VGA: ATI HD5870
HDD: WD SATA2 500G
Power: OCZ-Z1000W M
Cooler: WATER
OS: Microsoft Windows 7 Utimate K 64bit





1M


32M



wPrime


Prime95

[namegt]

Xeon W3520 [3910A724] 4.4G





CPU: Intel Xeon W3520
Mainboard: DFI UT X58 T3eH8
RAM: G.SKILL DDR3 6G PC3-16000 TRIDENT 2x3G
VGA: ATI HD5870
HDD: WD SATA2 500G
Power: OCZ-Z1000W M
Cooler: WATER
OS: Microsoft Windows 7 Utimate K 64bit

EIST Function: Enabled
CxE Function: C1E
CPU : 1.4v
VTT : 1.5v
RAM : 1.69v


1M


32M


wPrime


3DMark06


3DMark vantage

[CryptiK]

3849B018

[Juiced_IL]

Anyoen with an experience on a 3926A batch 920?

ya , not the best ... stable 4.2GHZ (200X21) with HT on vcore 1.4V and mushkin redlines 6-7-6-18 1T on VDIMM 1.66V and VTT 1.45V

[WCRF]

Lindasso Wagner hahahha,Congrats my Friend

Olha onde o Nash veio me achar??

Thanks, that cpu is not that bad..
Another result:

[madmax999]

[eva2000]

namegt very very nice batches there as well

3849B018

[IMG]http://i720.photobucket.com/albums/ww206/CryptiKone/PrimesmallFFT2hours40GHz21x1911112v.jpg

very nice cpu there mate

Trying to figure out max super pi 32M bclk headroom for this i7 920 3845B260 cpu and it looks very nice managing to boot straight from bios into windows at 227bclk bios set (226.8bclk) to run Super Pi 32M and then using Asus TurboV to push bclk to 228bclk (227.7bclk) to run Super Pi 32M. Ended up with screenie @229bclk (228.7bclk)

System:

• Intel Core i7 920 3845B260
• EK Supreme LT 1366 / FESER 480 / MCP655
• Asus P6T6 WS Revolution
• Gskill Trident F3-16000CL9T-6GBTD
• 512MB Inno3D 8800GT OC Edition 190.62WHQL
• 750GB Samsung SATA
• Pioneer DVR-217 DVD-RW
• Corsair HX1000 PSU
• Dual Boot - WinXP Pro SP3 (nLite fully updated) with Vista Theme & Win7 Ultimate 64bit RTM

bios set boot into windows @227bclk



TurboV bumped to 228bclk and 229bclk

[Sniper]

Nice bclk eva
Is it the cpu that limits higher bclk or the P6T6 WS ?
How much PCI did you use ?

On my GB Extreme with 103 PCI this is max I can boot and run with stability:

[Utnorris]

Ok, I do not have a SS, but here is my validation for 4.8Ghz:

http://valid.canardpc.com/show_oc.php?id=794165

Batch is 3849B018 and was done under phase. It's on the Blood Rage after I did the PCIe mod and was able to take it to 231Bclk x 21.

[madmax999]

Nice Utnorris
You can't go higher with BCLK?

[Utnorris]

Have to RMA my BR, it blew up.

[Utnorris]

Seriously? What the heck? Did CPUz misread your 975?