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CPU/NB going over 2600mhz FX-8120

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FathomX

New Member
Joined
Mar 23, 2010
Location
Norman, Oklahoma
Having trouble with my motherboard allowing me to go over 2600mhz CPU/NB.
Trying to run 8GB G.Skill Sniper 1866, though keep getting random BSOD every hour or so. Can't seem to pinpoint where the issue is or why I am unable to increase the BUS nearly at all without POST.

All power saving features disabled. C1E, LLC, Spread Spec., Turbo Core, Etc.
Any ideas would be great..

Processor @ 3.6ghz
200 x 18 multi
vCore - 1.2975v
CPU/NB - 2600
CPU/NB 1.35v
HT - 2600
HT 1.25v
NB 1.1v
DRAM 1866 Stock timing
Dram 1.5v


Specs:
FX-8120 OC to 3.6
ASRock 990FX Extreme3
Antec1200
Corsair H100
Tri-Fire (4870x2 + 4870)
Rosewill 1000w
 
It's normal. These cpus are losing stability with anything above 2500 CPU/NB. You need much better cooling to make it run faster.
Thats why there is no point to buy memory above 1866.
I'm able to make stable 300MHz FSB or 3500+MHz HT but I'm not able to make stable 2600+ CPU/NB on air/water cooling.
Phenoms can run at about 2800-3000MHz without bigger problems but FX just don't like it. Higher voltage won't help much ( I checked up to 1.7V what gave me about 2.8GHz for tests ).
 
Wow. Why would AMD advertise an 1866 native memory support when it won't handle it without excessive amounts of voltage and must have 2800 frequency to support it? Strange.

Thanks for the reply Woomack.
I suppose I will go for a higher core frequency and lower ram frequency/timing. Probably won't notice much difference anyhow.
 
I meant more like FX supports 1866+ on stock voltages but max transfers for 1600 and 1866+ are almost the same because of IMC limits. You can check some tests that I made here. Almost all made on standard CPU-NB that is ~2200 while last is on ~2330. Memory 1333-1866.

2 more screenshots, on 2750 CPU-NB and memory @2200 CL7-10-7-24 :

8120mem.jpg

and 2617 CPU-NB with memory @1600 8-8-8-24

8120mem2.jpg

Here you can see difference between cheap ram and most expensive high end available on market ( cpu clock won't affect memory transfers ).
I didn't have better screenshots to compare but I think its good enough :)
 
FWIW my fx6100 will do 2730 NB with a slight bump in voltage on a Sabertooth 990fx. So you might try upping the voltage a bit.

Currently at:
HT 3221
NB 2726
FSB 248
Multi 18.5
20567688.png
 
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