990fx FSB Over clocking

[xsuperbgx]

I am looking to get a 990 fx motherboard. I am interested in how these do for overclocking via FSB like for a non- BE cpu. I have seen a couple of results that seemed promising for the gigabyte boards, but I was wondering about any others. Please post any results or experiences and what your setup is. ie what board, cpu and cooling.
Thanks!

 

[Jagged_Steel]

I am running a 970 right now and I am able to easily hit 300 mhz with my FX-4170. With my 555 on this board the sweet spot was 244. I have a Crosshair V enroute as I type this, so maybe in the next couple of days I can show what difference it makes with a 990fx mobo.

But the direct answer to how 990's do for OC via fsb increase is that they are currently the best. That's the top rung of the AMD chipset ladder.

300x16 on a 970 mobo with a FX-4170

 

[Woomack]

Most 970/990FX boards will end up on ~320MHz . If you have luck then some more.
My 990FXA-UD5 made 300MHz stable , 330MHz max on 3 my cpus.
CHV made 300MHz stable and up to 320MHz max on FX8120 and Sempron 145.
For older cpus better get older boards like 790FX or you won't make high FSB.

 

[BeepBeep2]

Almost every DDR3 motherboard 870-990 will do 320 HT Ref. Clock and even more with HT voltage up some.

 

[xsuperbgx]

I guess my main issue is these:
http://hwbot.org/submission/2280970_tiborrr_wprime_32m_sempron_145_26sec_922ms
http://hwbot.org/submission/2280973_tiborrr_reference_clock_990fxa_ud7_405.05_mhz

I want to do that as well.... but still have a board that is worth a damn for BE cpu's as well. I think it could do some damage on pcmark 2005. Perhaps he is modding the board somehow. I also saw a 890fx submission that was real high, but I can't find it now.
http://hwbot.org/submission/2227782_varachio_reference_clock_ga_890fxa_ud7_438.05_mhz
http://hwbot.org/submission/2108440_demiurge_reference_clock_4_crosshair_iv_formula_432.01_mhz
You could get some better efficiency with these boards too , I would think.

 

[Jagged_Steel]

I guess my main issue is these:
http://hwbot.org/submission/2280970_tiborrr_wprime_32m_sempron_145_26sec_922ms
http://hwbot.org/submission/2280973_tiborrr_reference_clock_990fxa_ud7_405.05_mhz

I want to do that as well.... but still have a board that is worth a damn for BE cpu's as well. I think it could do some damage on pcmark 2005. Perhaps he is modding the board somehow. I also saw a 890fx submission that was real high, but I can't find it now.
http://hwbot.org/submission/2227782_varachio_reference_clock_ga_890fxa_ud7_438.05_mhz
http://hwbot.org/submission/2108440_demiurge_reference_clock_4_crosshair_iv_formula_432.01_mhz
You could get some better efficiency with these boards too , I would think.

3 of those benchmarks you linked are Liquid Nitrogen cooled. That's why they have crazy high benchmarks. On the one air cooled example he is running a bus of about 320, but he is only hitting 3.4 Ghz. I am not sure what it is you are trying to find out or what those examples are supposed to show.

 

[ssjwizard]

I ran my 990Xa-UD3 @ around 330 on my sempy 140, and around the same for my 925 both done on water cooling. I havent really tested the FSB scaling on my 990FXa-UD3 but I imagine its similar.

 

[bburrill2012]

What settings would need to be changed to get a FSB that high. I am at 255 right now and have cpu/nb voltage at 1.275v and nb and ht link on auto