Core i7 Overclocking by Batch #

[systemviper]

3845B027. This CPU clock, 5383.73 Mhz, is #1 on HWbot for both i7 920 and W3520.

http://valid.canardpc.com/show_oc.php?id=593562

Nice, i put this aside when they first came out from tankguys, i just looked at it for a build i am doing, an saw it's 3845B027, should be some interesting testing....

[road-runner]

3849B018, Heatkiller copper block...

[drewxbk]

Finally got my account validated, I have batch 3904A361. Haven't heard anything at all about this batch yet..so far I've gotten 3.7 at 1.1vcore

[freshy]

Nice, i put this aside when they first came out from tankguys, i just looked at it for a build i am doing, an saw it's 3845B027, should be some interesting testing....

nice batch

3849B018, Heatkiller copper block...

nice , what was vcore and qpi/vtt voltage in bios for 4.5ghz ? and what cooling and mobo ?

i havent pushed past 4.2ghz @ 1.255v yet, i had to rma my 2000mhz blade kit, so i was stuck testing the mem for a few days and got sick of it , but might push cpu a bit more today but ive only got a 2x120 rad at the moment and my temps are already hitting 70c when priming @ 1.255v so not sure how far il be able to push till i get another rad

[freshy]

4.3 @ 1.306 vcore
4.4 @ 1.337vcore, qpi/vtt 1.3v

is 80c max on worst core to much to be priming at ?

[zalbard]

is 80c max on worst core to much to be priming at ?

I'd say fine till 85. I wouldn't recommend more. Your call, though.

[aver]

Just got my I7 920 Batch #3910A379

I am 24-Hour Prime Stable at 3.6Ghz (180x20) 1.25v

I am testing 3.78 (Turbo on) .. You will notice on the screen shot that CPU-Z reads 1.16 ? I have it set in the bios to 1.25v. Anyone have any tips on keeping the CPU Voltage Regulator cool? It looks to be getting a little high.

I am getting some G.Skill Trident (2000Mhz) on Monday so I will see what the CPU can handle then.

My Setup is:
Intel DX58SO Smackover (Newest Bios)
Intel I7 920 D0 Stepping
Thermalright Ultra-120 eXtremee 1366
OCZ OCZP16006GK Rated for 7-7-7-20 DDR800 @ 1.7V | Running 7-7-7-24 720Mhz @ 1.58v
Antec 900

[phsinc1]

Just got my I7 920 Batch #3910A379

I am 24-Hour Prime Stable at 3.6Ghz (180x20) 1.25v

I am testing 3.78 (Turbo on) .. You will notice on the screen shot that CPU-Z reads 1.16 ? I have it set in the bios to 1.25v. Anyone have any tips on keeping the CPU Voltage Regulator cool? It looks to be getting a little high.

I am getting some G.Skill Trident (2000Mhz) on Monday so I will see what the CPU can handle then.

My Setup is:
Intel DX58SO Smackover (Newest Bios)
Intel I7 920 D0 Stepping
Thermalright Ultra-120 eXtremee 1366
OCZ OCZP16006GK Rated for 7-7-7-20 DDR800 @ 1.7V | Running 7-7-7-24 720Mhz @ 1.58v
Antec 900

my batch is close to yours 3910A264, I was able to get 4GHz 191x21 stable with 1.280v under load in CPU-Z, I can pass linx 50 passes full memory with 1.264v but OCCT CPU needed 1.280v to pass 6 hours

[road-runner]

nice batch



nice , what was vcore and qpi/vtt voltage in bios for 4.5ghz ? and what cooling and mobo ?

Water cooling heatkiller copper block, swiftech 3 x 120 radiator, 655 pump. vtt 1.3v. I dont remember what vcore was set on, classified board...

[Osterman]

Nice, i put this aside when they first came out from tankguys, i just looked at it for a build i am doing, an saw it's 3845B027, should be some interesting testing....

SHould be nice to know if the same batch but with an A instead of a B can do the same.
As I already said there are some 3845A which can do 4.2ghz with 1.25 vcore.
Who know what they can do with 1.35 or 1.36

[poke349]

SHould be nice to know if the same batch but with an A instead of a B can do the same.
As I already said there are some 3845A which can do 4.2ghz with 1.25 vcore.
Who know what they can do with 1.35 or 1.36

Is it still that easy to find 3845B now? That's last year's batch... lol

I got my i7 some 2 weeks ago and it's 3914A... It to hit 4.2 GHz @ 1.25 vcore without trying.

Maybe we should start checking if any of the newer batches are as good as 3845A.

[road-runner]

Is it still that easy to find 3845B now? That's last year's batch... lol

I got my i7 some 2 weeks ago and it's 3914A... It to hit 4.2 GHz @ 1.25 vcore without trying.

Maybe we should start checking if any of the newer batches are as good as 3845A.

I went to microcenter to get one of the $200.00 920s and saw a B batch setting in the case and told them to give that one...

[poke349]

I went to microcenter to get one of the $200.00 920s and saw a B batch setting in the case and told them to give that one...

I had some time to play with my chip a little more last night.

To restate my specs:

920 D0 - Batch #3914A114
Asus Rampage II GENE
6 x 2 GB Patriot Viper @ 1333 MHz

All memory timings set to auto.
All CPU features (including HT) are enabled.
Memory speeds set to the highest speed below stock (1333MHz).
Memory voltages set to auto, but never allowed above 1.6v.

Stress testing was done using:

• prime95 small FFTs
• y-cruncher, Multi-Threaded Pi Benchmark

Stock vcore is either 1.13 or 1.16 (bios and turboV give me different values)

vcore = 1.15v
uncore = 1.200v

3.8 GHz (181 x 21) - stable
3.9 GHz (186 x 21) - appears stable
4.0 GHz (191 x 21) - 10 min. prime stable


vcore = 1.175v
uncore = 1.200v

3.8 GHz (181 x 21) - stable
3.9 GHz (186 x 21) - appears stable
4.0 GHz (191 x 21) - appears stable
4.1 GHz (195 x 21) - 5-10 min. prime stable


vcore = 1.200v
uncore = 1.200v

4.0 GHz (191 x 21) - appears stable
4.1 GHz (195 x 21) - 5-10 min. prime stable


vcore = 1.225v
uncore = 1.250v

4.0 GHz (191 x 21) - stable
4.1 GHz (195 x 21) - appears stable

----------------------------------------------------------------

The rest are all @ 4.2 GHz (200 x 21):

vcore = 1.225v, uncore = auto to 1.39v
unstable: 2 billion digits of pi failed after 2 min.

vcore = 1.250v, uncore = auto to 1.39v
appears stable: 2 billion digits of pi success - twice in the row (21 min. for each run, 42min. total)

vcore = 1.250v, uncore = 1.250v
5-10 min. prime stable

vcore = 1.250v, uncore = 1.275v
appears stable

• > 30 min. prime stable
• successful computation of 2 billion digits of pi - twice in the row. (21 min. for each run, 42min. total)

I stopped here. Any higher and it hits 80C which is the threshold for turbo-throttling.

In this last test @ 1.250v/1.275v, both prime95 and Pi were sustaining 77-78C and turbo V8 was already showing a bit of turbo-throttling.



In light of these results, I've lowered my 24/7 config (167 x 21 = 3.5GHz) vcore from 1.2v to 1.15v and locked the uncore to 1.20v

[tomslick.ca]

Nice, i put this aside when they first came out from tankguys, i just looked at it for a build i am doing, an saw it's 3845B027, should be some interesting testing....

I was able to do 4.6Ghz @ 1.35V on air with that batch
http://valid.canardpc.com/show_oc.php?id=581572

running 4.0Ghz @ 1.168V HT on 24/7
http://valid.canardpc.com/show_oc.php?id=575750

[systemviper]

I was able to do 4.6Ghz @ 1.35V on air with that batch
http://valid.canardpc.com/show_oc.php?id=581572

running 4.0Ghz @ 1.168V HT on 24/7
http://valid.canardpc.com/show_oc.php?id=575750

your getting me excited, got to get playing