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AMD FX-8120 Overclocking/Benchmarking - Page 7

post #61 of 195
What BIOS revision are you running?

I was lucky enough to grab the F6D bios last weekend before it was pulled from the UD5 page for some mysterious reason. Hopefully I won't have any errors overclocking with this revision when my 8120 arrives on Monday.
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post #62 of 195
im curious of this......maybe messing around with it more might make BD worth a look?
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post #63 of 195
Well I am definitely convinced the chips not by any means trash. The more benchmarks that I see the more I realize the gaps are closing as people learn to tweak the systems. Not to mention optimization on future program code. I am looking forward to pluggin mine in when I get home.
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post #64 of 195
Got my 8120 today... Bar none, the most fun I've had with a CPU in a long time, and compared to my 1100t at a similar clock (4.125ghz @ 1.488v w/ 3.0ghz NB @ 1.3v NB, stock HT Link and CPU-NB, 2000mhz DDR3), the performance gain is pretty impressive, in my book! Maybe not what a theoretical Phenom II x8 would be, but a great step forward, nonetheless. Key ares where I'm seeing some excellent gains are in my 6970 crossfire scaling, 3dmark 11 and Vantage scores, while still a little behind in Fritz Chess (don't have exact figures, but just a few hundred knps behind), SuperPI (standard and abysmal 20s) and Cinebench (1100t got a whopping 7.24 here, after the NB overclock and addition of 2ghz DDR3).

The 8120, for my initial comparisons, I am running at 4.2ghz with stock NB and HT and only 1866mhz RAM for the time being. Bumping my RAM up to its native 2000mhz, and pushing the clockspeeds up to where I'm confident they can reach, I am certain I'll see the 1100t falling further and further behind. Add a northbridge overclock (and investigate HT Link scaling on these chips) could yield even more significant gains.

Cooling on air with a Zalman CNPS11x, I've not seen my load temps exceed 40C average (sometimes creeps up to 42C for few seconds here and there, but tbh, have only been casually monitoring them to make sure they remain nominal with my new cooler, which they are so I wont worry too much until I'm really pressing the limits).

Looking forward to opening the throttle on this puppy tomorrow!!
Edited by regimen - 10/15/11 at 1:24am
    
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post #65 of 195
Thread Starter 
Quote:
Originally Posted by ORL View Post
Hey bud, Id like to point out a few things for the BD overclocking that will help you reach higher clocks.

First and foremost you really want to do this via the Front Side Buss. It responds to this far better and will perform higher numbers by doing so.

1:BD responds to voltage in different ways than all of the AMD chips before it. You have to be careful as to much or to little is going to cause you grief. Its about finesse not force. A lot of people are hitting around 5Ghz at less than 1.5

2: Try not to exceed 2600Mhz on the North, they really haven't liked this so far from multiple sources.

3: Disable any cool and quiet and spread spectrum type options as these can hinder your OC.


Also El Gappo was kind enough to share with the forums his initial over clocking experience and results with the forums. You can find this in the AMD section.


Good luck!



EDIT: Also!!! Show me some memory benchmark love at different speeds and timings please!!!!! I will be forever grateful as it will be at a min another week before I can test my new one myself because of business trips.
Hey thanks, I woke up early just to do more tests before kegs and eggs (homecoming at my college, so today I won't be posting too much).
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post #66 of 195
Quote:
Originally Posted by CodyOdi View Post
Hello, it's been a while since I last posted on here but UPS delivered my AMD FX-8120 today, as well as a new motherboard and enclosed water cooling setup.

Currently my experience with Bulldozer has been pretty positive, although while running Prime95 I do notice that the multiplier changes on it's own, from what I can tell I've done everything to disable this in the BIOS but it still does it.

It seems to keep 4 cores at the correct multiplier and then 4 are changed to a lower one. There are also times where all 8 cores stay at the correct multiplier, however it seems like this could be one reason why benchmarks weren't that impressive. If the multiplier drops down to 7 when it's usually 17 (in my case 22) it's obviously going to have issues, however that's just me speculating...

Anyway I thought I'd open this thread up since I'm guessing I'm one of the first consumers to have this processor and I am going to run some tests and see how far I can push it. I will also be looking to this thread for some assistance with overclocking as I've never done much with overclocking and this is the first processor that I actually got the courage to change stock voltages.

So far I was able to do 4GHz right out of the box without changing anything but the multiplier. After 4GHz things get a little unstable and increasing the voltage seems necessary. Currently I'm at 4.5GHz @ 1.360V and the temps are sitting at 49C at 100% load running Prime 95.
Sorry, can't read through the entire thread, so somebody might already have said that.

That jumping multi can be fixed by setting your Windows power plan to High Performance.
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post #67 of 195
Thread Starter 
Here is a run of Cinebench, CPU only @ 4.53GHz

From what I saw of http://www.guru3d.com/article/core-i...600k-review/14 it beats out the Core i5 2500K.


Note:I didn't run Prime 95 for stability, it's been giving me all sorts of checksum issues, usually starting with the 6th core.


**It also seems to play Starcraft 2 fine on high settings, max temp I saw was 45C and FPS never dropped below 30 on Ultra/High mix.**

Windows Experience Score @ 4.53GHz, I figured this would be a decent comparison. My score went from 7.4 with my i5 to 7.7 which leaves me to wonder what you need for 7.9?



Yet another Cinebench result, this time @4.63GHz getting close to 12 core Opteron scores now.

Edited by CodyOdi - 10/15/11 at 6:31am
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post #68 of 195
Quote:
Originally Posted by CodyOdi View Post
H

Yet another Cinebench result, this time @4.63GHz getting close to 12 core Opteron scores now.
Just for reference i pull a 7.35 score at 4.6ghz
post #69 of 195
Thread Starter 
Quote:
Originally Posted by Don Karnage;15317932 
Just for reference i pull a 7.35 score at 4.6ghz

Thanks, you're using a 2500K right?

Also just another update I'm at 4.7GHz now, Cinebench tests haven't really improved much though so I'm not going to worry about posting those right now.
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post #70 of 195
This is GREAT! I was wondering if you could possibly do some SuperPI tests at those clocks?
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