Core i7 920 rev D0 stepping 5 :)

[Ace-a-Rue]

Batch 3850A978 & 3851A373




lets start with 3850A978
4725MMz @ 1.39v
Biostar Tpower
Corsair Dominator GT
Thermalright Ultra 120 RT+San Ace 120mm 102cfm
room temp @ 25c



3851A373
230MHz of bclk on air ( 965XE stock cooler)
Biostar Tpower X58
Corsair Dominator GT
room temp @ 25c

http://valid.canardpc.com/show_oc.php?id=566918

WOW!..you are burning those cycles up!...NICE GOING!

can you boot at those speeds?..and, if not, what is your max bootable overclock???

darn, i should have bought the biostar x58 board but i opted for the evga x58 classified 760 version...i hope it is kind to me like your biostar has been to you!

[jcniest5]

Yay! I managed to get myself a 3849B028! I placed an order online to make sure I at least get one, but when I got to Micro Center, the one they put aside was C0, so I went to the display glass and asked salesperson to check a few there, first one was another C0, then the second one he got, it's a D0 and B028, exactly what I had in mind to get. The sale is over on the 22nd. I might go back and get a few more of different batch, test them all and keep the one I like, sell the rest.

[cky2k6]

Yay! I managed to get myself a 3849B028! I placed an order online to make sure I at least get one, but when I got to Micro Center, the one they put aside was C0, so I went to the display glass and asked salesperson to check a few there, first one was another C0, then the second one he got, it's a D0 and B028, exactly what I had in mind to get. The sale is over on the 22nd. I might go back and get a few more of different batch, test them all and keep the one I like, sell the rest.

waiting for your results seems b028 is good, but mine runs hot. I'll probably reseat my true to confirm.

[jcniest5]

waiting for your results seems b028 is good, but mine runs hot. I'll probably reseat my true to confirm.

We'll find out soon enough within the hour. Taking it apart as I type on my secondary PC.

[crashmax]

Your result in on WaterCooling ?

Yes it is. CPU Block is Alphacool HF 14 Yellowstone and Mora2 Radiator with 9 Fans.

[jcniest5]

Well, good news and bad news. The good news first. It is that it actually runs cooler than my other CPU. It defaults to a lower voltage (1.088v vs. 1.160v). I haven't tried overclocking just yet. I will take my time to make it works okay on stock speed first. Well, here comes the bad news. I think I managed to kill my GTX285 in the process. While turning it on for the first time, nothing on the screen. Cleared BIOS, tried again. This time, the screen became filled with artifact everywehere. Turn it off, and turn it on again. Nothing. No signal. Put a different video card in, it works. Put the GTX285 back in, nothing. Nothing. Once, twice, thrice...Put the other video card back in. Works. So, my GTX285 is cold dead. Will have to RMA it now back to EVGA.

Will update with OC later on.

Edit/Add:

An hour and a half later and I'm back. I think it's my board that is limiting my OCing. I get the same OCing result with the new CPU as the old one. So, I'm pretty sure it's just something I'm not doing correctly. Both of these CPUs have high potential of high OCing with the right mobo/memory and expertise like you guys have. Unfortunately, being a newbie, I simply just cannot get the desired OCing experience that you guys can.

[jpm804]

Well, good news and bad news. The good news first. It is that it actually runs cooler than my other CPU. It defaults to a lower voltage (1.088v vs. 1.160v). I haven't tried overclocking just yet. I will take my time to make it works okay on stock speed first. Well, here comes the bad news. I think I managed to kill my GTX285 in the process. While turning it on for the first time, nothing on the screen. Cleared BIOS, tried again. This time, the screen became filled with artifact everywehere. Turn it off, and turn it on again. Nothing. No signal. Put a different video card in, it works. Put the GTX285 back in, nothing. Nothing. Once, twice, thrice...Put the other video card back in. Works. So, my GTX285 is cold dead. Will have to RMA it now back to EVGA.

Will update with OC later on.

Edit/Add:

An hour and a half later and I'm back. I think it's my board that is limiting my OCing. I get the same OCing result with the new CPU as the old one. So, I'm pretty sure it's just something I'm not doing correctly. Both of these CPUs have high potential of high OCing with the right mobo/memory and expertise like you guys have. Unfortunately, being a newbie, I simply just cannot get the desired OCing experience that you guys can.

Just curious what tempts you were getting stock and overclocked?

Aslo what motherboard are you using currently?

[jcniest5]

Just curious what tempts you were getting stock and overclocked?

Aslo what motherboard are you using currently?

Stock speed, underloaded temp goes to 60 (idle @30-32). Best OC I have so far is 21x205 (4.305Ghz) underloade temp is around 85. Idle is 50ish. I'm using MSI Eclipse Plus with BIOS 1.0B25.

I am wondering what these settings will do to the OCing of the CPU or board.

CPU Amplitude Control [800mV]
PCI Express Amplitude Control [800mV]
CPU CLK Skew [Normal]
IOH CLK Skew [Normal]

Is that any benefit to change these settings? If yes, to what number?

[revogamer]

mhmm i can get a i920 3850A978 exaclty, it ocs well i see as well...

[lee63]

Have you tried the stock cooler just to see what tempts you get ... maybe the true is not making good contact.

After lapping my True my temps have gone down a lot...it was bad, there was like a lump right in the middle of the HS, just the opposite to concave.

I might even do the CPU.

[jpm804]

After lapping my True my temps have gone down a lot...it was bad, there was like a lump right in the middle of the HS, just the opposite to concave.

I might even do the CPU.

That's good to hear.... now it's time to crank up that chip and see what she can do on air

[E30M3]

Here are my DO
Have only had it for one hour
do not expect that it is everything it can
do

[PcCI2iminal]

WOW!..you are burning those cycles up!...NICE GOING!

can you boot at those speeds?..and, if not, what is your max bootable overclock???

hello Ace

nah, i can not boot at 4700MHz ,not on air but i can boot at high speed under cold


233MHz of bclk @ -50c


but its not stable enough to get into windows :S , 4850Mhz is more realistic ^^

darn, i should have bought the biostar x58 board but i opted for the evga x58 classified 760 version...i hope it is kind to me like your biostar has been to you!

she amazes me with her power

i should have bought the biostar x58 board but i opted for the evga x58 classified 760 version

Tpower can do some serious damage on air but Biostar is no match for Classified on ice

[emertX]

Nice dude!

[cky2k6]

Haven't done any suicide runs yet, but I have gotten 4.4ghz bench stable. Batch 3849B028

[jcniest5]

cky2k6, what board do you have again? Can you give me a complete voltage rundown of your BIOS? Perhaps I can duplicate your settings and see if mine would be stable at 4.4Ghz as well.

[cky2k6]

cky2k6, what board do you have again? Can you give me a complete voltage rundown of your BIOS? Perhaps I can duplicate your settings and see if mine would be stable at 4.4Ghz as well.

I have an asus r2e, its in my sig. 4.4 isn't stable, it wouldn't last a minute of linx, just enough for a few quick benches. Its set for 1.4 vcore, 1.4 uncore, 1.35 nb, 1.3 sb, and 1.7v ram.
Some 4.5ghz numbers, all I changed was vcore to 1.45 and lowered uncore to 3.65ghz.

it also completed an 06 run, this chip seems to have very good 3d stability.

[jcniest5]

It's strange that it's semi-stable but as soon as your run LinX, it crashes within seconds. By semi-stable, I mean I can run CPU-Z, SuperPI and Everest Benchmark. Under LinX, it's a totally different world.

[Fafeifa]

Just got myself a Xeon 3902A250, so far it does 4.0ghz at stock voltage everything with HT on. Haven't tried it further as i'm currently in China, just did a quick run at the shop. Sounds pretty good, they also had a 3849B507 was debating which one but i've decided for the xeon don't know if i made the right choice

[eva2000]

lets see how this i7 920 3851A368 D0 handles memory clocking with 10x memory multiplier. First stop at DDR3-2000Mhz 7-8-7-20 1T at 1.65v

Room ambient temp = 25-26C

• Win 7 Ultimate 64bit RC OS used
• Powermate wattage meter reads peak system power consumption of ~620 watts drawn from wall

Linx 0.5.8.2 Load



Linx 0.5.8.2 5pass



System:

• i7 920 3851A368 D0 stepping
• EK Supreme LT 1366 / FESER 480 / MCP655
• DFI UT X58-T3EH8 04/28 beta
• 2x HD4870x2 Crossfire (Powercolor + Gigabyte flashed to Asus Top bios) with ATI Win7 9.4 (8.612 WHQL)
• 6GB Corsair Dominator GT DDR3-2000Mhz 7-8-7-20
• 750GB Samsung SATAII
• Silverstone OP1200 PSU
• Triple boot - WinXP Pro SP3 / Vista Ultimate 64Bit SP2 / Win7 Ultimate 64bit RC

5 passes not enough? How about 20 passes + 3dmark06

Room ambient temp = 23.5-26C

• Win 7 Ultimate 64bit RC OS used
• Powermate wattage meter reads peak system power consumption of ~628 watts drawn from wall

Linx 0.5.8.2 Load



Linx 0.5.8.2 20 pass

[Renegade5399]

Looking good eva. I am thinking the 4/28 BIOS is the best so far. I have been having very good luck with the Xeon and the Kingstons. I can push past 2000MHz RAM, but 201*21 is a nice "sweet spot" for 24/7 running. It's just so damned stable and reliable!

[roller11]

Nice going PcCI2iminal, 5 Ghz is tough to get under any conditions, congrats!

[Sam_oslo]

DFI LP UT X58-T3eH8, 02/17 BIOS
Xeon W3520 (# 3848A352)
Prolimatech Megahalems, 2x1200RPM Scythe Slip Stream

Vcore: 1.28/1.23v (BIOS/Load)
NB Core: 1.13/1.12v
Everything else: @Stock/default, including QPI-VVT: 1.21/1.24v

@4.20GHZ (210x20) HT:On, 1.23v, 1 hour primestable

[MrSlacker]

Just picked up a D0 3849A866 at Micro Center. Really hoping I can hit 4Ghz on air.

[Sniper]

TRUE with 1x120mm Pabst 38db, 22 degrees ambient.