i7 920 @4769Mhz TRUE120 AIR !

[eva2000]

Now that I've found my max Bclk limit of 228-230Blck, it's time to revisit max i7 920 AIR overclocks with HT disabled

Room temp = 21.5C - 23.5C

System specs

• Intel Core i7 920 3836A756
• Thermalright Ultra 120 Extreme + LGA1366 Bolt Thru kit + 2x 120x38mm Scythe UltraKaze 2000rpm 87cfm fans in push/pull
• DFI LP UT X58-T3EH8 R.A51 - 01/06 beta bios
• 128MB Gainward FX5200 PCI
• 2x1GB Corsair DDR3-2133C9DF Dominator + 1GB G.Skill PC3-12800HZ (3x Samsung HCF0)
• Ram cooling: 3x 60x25mm Sunon 23.5cfm Maglev fans
• 80GB Hitachi 7K80 SATAII
• Pioneer DVD-RW
• 1KW Corsair HX1000 psu
• WinXP Pro SP3 full nLite updated hotfixes / Windows 7 beta dual boot

i7 920 3836A756 @4769Mhz at 1.59375v bios​

Max screen capture capable @4680Mhz at 1.5875v bios

Max Super Pi 1M & Pifast
@4677Mhz at 1.5875v bios​

40416 efficiency

Max Super Pi 32M​

@4638Mhz - more efficient run (2178985)

@4652Mhz - less efficient run (2184839)

Lucky I took this screen capture first, as system rebooted before I could load the other cpuz instances

Bench rig photos

 

[aerick]

holy smokes batman, thats fast. good job.

 

[Kalivos]

I just did a very foul act within my pants.

What heatsink is that?

 

[cmichaelt]

I just did a very foul act within my pants.

What heatsink is that?

Take a look at this thread. Does a good job comparing two different models but similar build.

http://www.ocforums.com/showthread.php?t=591890

 

[trueplaya4ever8]

Eva.. as usuall amazing!!

Just curious do you still have your massive bh5 collection?

 

[sandyduff]

What fans are those on the TRUE? they look like meaty fans....

Good job BTW....

 

[Kuroimaho]

Wow man, was there a cpu before which did 4.7G on air ? Maybe a P4 ?

4 cores over 4.5G... please do not tease us more I might not b able to resist and will buy one. ^^;;;

What fans are those on the TRUE? they look like meaty fans....

Good job BTW....

There is one with the scythe sticker still on so I assume ultrakaze.

Ahh yes seems we both missed it, he wrote about it in his specs.

 

[rdrash]

Hi Eva...nicely done there mate!

Saw your threads at XS too....smoking bclks man!!! and keep on pushing pls.....

 

[sandyduff]

Ahh yes seems we both missed it, he wrote about it in his specs.

Whoops!!

 

[JCLW]

Wow man, was there a cpu before which did 4.7G on air ? Maybe a P4 ?

Cedar Mill & Presler will - particularly the later steppings. My D945 will do 4.5ghz at stock voltage and 4.7 with a small voltage boost (cooled with a Zalman 9700). Pity my 955X based board tops out at 275FSB because I'm sure my D945 would go higher.

 

[ShadowPho]

8.6 s superpi...

Weird memory config though...

Really cool!

 

[agentbad]

Isn't that voltage too high?

 

[Neuromancer]

Very nice job!

What kind of temps are you getting at those speeds? Must be melting the fans I would think

 

[Badbonji]

The voltage is fine not for 24/7, someone used 1.74Vcore for a phenom II in the AMD section. What are the temps, I bet you could have cooked a fry up on that

 

[deathman20]

The voltage is fine not for 24/7, someone used 1.74Vcore for a phenom II in the AMD section. What are the temps, I bet you could have cooked a fry up on that

Voltage isn't what really controls the temperature, yes it does have an effect but its the Mhz that really jacks up the voltage. Try it yourself you should see that even a .05/.1V increase has little effect on temperature vs say even a 500Mhz increase.

 

[jason4207]

Voltage isn't what really controls the temperature, yes it does have an effect but its the Mhz that really jacks up the voltage. Try it yourself you should see that even a .05/.1V increase has little effect on temperature vs say even a 500Mhz increase.

Everything I've read suggests that voltage affects temps exponentially, and frequency affects temps linearly.

Are you measuring load temps? Do you have any voltages on auto?

 

[Roofles]

Awesome overclock, but can I make fun of you for the FX5200? Please?

Is it just a bench rig without graphics needs or what?

 

[deathman20]

Everything I've read suggests that voltage affects temps exponentially, and frequency affects temps linearly.

Are you measuring load temps? Do you have any voltages on auto?

This was load temp and it was a set voltage. I did the test a while back on I thought I did it on this E8400, but I know I did it on past E6400 and E6600's as well, it was rather cool.

But the fact is while yes you have "X" amount of voltage going through the CPU, but higher the voltage less amps needed in therory. So really its using similar wattage.

 

[trueplaya4ever8]

Awesome overclock, but can I make fun of you for the FX5200? Please?

Is it just a bench rig without graphics needs or what?

Its for more MHZ!

 

[Painsorrow]

awesome overclock man