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post #1611 of 8112


An 8150 will not run Prime 95 stable much over 4270mhz with air cooling, no matter how much voltage you feed it
A good air cooler is rated at 300 watts if you run a chip at 400 watts the air cooler will not keep it cool long

Quote:
Originally Posted by KarathKasun View Post

Umm, afaik most of the 8150 and 8120's can hit about 4600 with a good board. Been seeing lots of odd bios problems out of Gigabyte boards during this launch. My ASRock was fixed and 100% solid with only 3 BIOS releases. if someone has a FX-8120 that maxes out under 4.4Ghz they got an extremely crap chip or have a bad or buggy motherboard.


 


Edited by Tweeky - 11/25/11 at 3:24pm
 
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post #1612 of 8112
Quote:
Originally Posted by Tweeky View Post

If you overclock a FX-8150 @ 4270 and a 1090T @ 4000 then which one is better

http://www.overclock.net/t/946327/official-asus-crosshair-v-formula-990fx-club/2490#post_15344012

Quote:



The 8150.
From my testing and also confirmed by another members.
You need 100mhz more for it to win in the ram tests and 200mhz more for it to win in the floating point. 4270mhz is 270mhz more so it would win at every test easy provided you have a bios that works properly with disabling APM and Cool & quite and turbo core. Or you do the AOD trick.
Single thread performance needs to be 200mhz more as well to be equal.

Looks like they left APM enabled in that 3dmark results.

I get P4337 with my 8120 @ 4.2ghz and P4107 with my 1090t @ 4ghz on 3dmark 11 with my 6850.
Phyics being the biggest difference in the individual tests, With my 8120 its nearly twice that of the 1090t.

700
post #1613 of 8112
Quote:
Originally Posted by Tweeky View Post

An 8150 will not run Prime 95 stable much over 4270mhz with air cooling, no matter how much voltage you feed it

A good air cooler is rated at 300 watts if you run a chip at 400 watts the air cooler will not keep it cool long

At 4.2ghz its only pulling 240w from that wall, Thats including the whole PC. With a good air cooler you should be fine up to 4400mhz.
Feeding it more voltage doesn't stablise it if its running too hot, It just makes it hotter. Instead you need to optimize it with FSB overcloking instead of just using the multi and voltage.

Iv got mine running at 5ghz on 1.48V with a antec 620 water cooler.
It wouldnt do it with just the multi, I needed to use 250mhz FSB, 3K HT link. 2.5K NB.
At that speed it completely dusts the 1090t I upgraded from.
Its like the difference I got from a AM2 4600+ to a 1090t.

But with both at completly stock speeds or with APM enabled the 1090t is better.
The 1090t is still a good buy if you have a old motherboard with doesnt have proper support or if you have a power limit and want best performance per watt. And of course if you dont overclock.
post #1614 of 8112
Quote:
Originally Posted by axipher View Post

Well at all stock settings, my default VID @ 3.6 GHz is 1.275 V in Coretemp and 1.248 V in CPU-Z. Coretemp has always matched my BIOS though. Under Prime95 Load, voltage doesn't budge.
Settings:
FSB @ 200 MHz
NB: 2400 MHz @ 1.2 V
HT: 2000 MHz @ stock
RAM: 1866 MHz
Timings: 9-10-9-28-42-2T
Update, here's a list of my testing being done.
3.6 GHz -> 1.275 V @ 34 C
4.2 GHz -> 1.325 V @ 37 C
4.3 GHz -> 1.375 V @ 40 C
4.4 GHz -> 1.4125 @ 49 C


I have my 8120 at 4.94GHz at 1.525v. I have taken cpu up to 1.6v so your voltage is safe up to 1.55v. The chip can definitely handle 1.525v so I would try that and see how high you can clock it. Let me know how high you get and your temps. Are you running air cooling. With water cooling I can get 4.8GHz no problem but after that I have to use cold outside air and I could usually get to 5.1Ghz stable if the temp is low enough.

Let me know if you have any questions. Your VID seems a little low for 8150. You should be able to get to at least 4.8-5.0Ghz with good air or decent water cooling.

Keep me updated on your progress.

Thanks.
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post #1615 of 8112
You shouldnt have to raise the voltage up until you get around 4.5Ghz or higher. If you have to raise voltage around 4.2Ghz or lower than I would replace the chip. I can get 4.5GHz with auto voltage. Going from 1.375 to 1.4125 is to much jump for just 100MHz. You should have to raise voltage to 1.4-1.45v once you get around 4.6-4.7GHz. Let me know how it goes.
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post #1616 of 8112
My power draw is probably something like this (FX-4100 @ 4.6Ghz, GTX470 @ 850Mhz & 1.1v, 4x HDD's, 12v Stereo amps)

100w MB/RAM
200w CPU
250w GPU
40w HDDs
160w Stereo AMPs

In reality, everything is probably not quite as high. At full load the power supply exhaust gets warm, but not too hot(700w Tagan PSU). Never had a PSU OCP / Temp shutdown on the computer.

Seeing as the FX-4100 uses ~75% of the power that the FX-8150 uses, its a safe bet that an FX-8150 pulls 300w at full load. This is assuming a similar quality chip etc, in reality it might get up to 330w. Gotta remember that 500w at the wall (425w actual load) includes HDD / SSD / Motherboard / Ram / Video, which can easily be 100w.
Edited by KarathKasun - 11/25/11 at 6:54pm
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post #1617 of 8112
I GOT IT TODAY!

Djmatrix32 - FX-4100 - Asrock 890GX Pro3
http://valid.canardpc.com/show_oc.php?id=2116920
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post #1618 of 8112


thanks i will give it a try
 

Quote:
Originally Posted by bmgjet View Post


At 4.2ghz its only pulling 240w from that wall, Thats including the whole PC. With a good air cooler you should be fine up to 4400mhz.
Feeding it more voltage doesn't stablise it if its running too hot, It just makes it hotter. Instead you need to optimize it with FSB overcloking instead of just using the multi and voltage.
Iv got mine running at 5ghz on 1.48V with a antec 620 water cooler.
It wouldnt do it with just the multi, I needed to use 250mhz FSB, 3K HT link. 2.5K NB.
At that speed it completely dusts the 1090t I upgraded from.
Its like the difference I got from a AM2 4600+ to a 1090t.
But with both at completly stock speeds or with APM enabled the 1090t is better.
The 1090t is still a good buy if you have a old motherboard with doesnt have proper support or if you have a power limit and want best performance per watt. And of course if you dont overclock.


 

 
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post #1619 of 8112
Thread Starter 
wait, you are saying you were using the multiplier only o_O

what do you think this is? Sandy Balls.....errr Bridge?
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post #1620 of 8112
Quote:
Originally Posted by mikezachlowe2004 View Post

You shouldnt have to raise the voltage up until you get around 4.5Ghz or higher. If you have to raise voltage around 4.2Ghz or lower than I would replace the chip. I can get 4.5GHz with auto voltage. Going from 1.375 to 1.4125 is to much jump for just 100MHz. You should have to raise voltage to 1.4-1.45v once you get around 4.6-4.7GHz. Let me know how it goes.

Thanks for the tip, I'm just running multiplier only for fun to see what I can get, then I'll tune using the FSB or whatever you want to call it.

I could get 4.5 at auto voltage, but it wasn't Prime95 stable, kept getting SUMOUT errors on core 7 and 8
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