well even tho this thread looks a little close to the necro side..... for all phenom X4 C3 owners looking to optimize IPCs i share with you my personal experience with my trusty 965 c3 (bought in 2012) and trying to find its "sweet spot" this is with 32GB of Gskill ares DDR3 1866. will upload cpuz's and screenies if you want for the different settings if you want to see how it scales with heat and voltage. depends how much time i have
if memory serves (and i can double check) 1.35v nb-cpu (w/e core to ram link) is all it takes up to 4.4ghz and anything past 1.42 seems like a hinderence actually, i have tested in increments as high as 1.6v cpu-nb and its simply to much heat. if you had the best watercooling setup ever maybe 1.45+ish will help but honestly im thinking super chilled water if you really need to push 1.5v cpu-nb, just food for thought.
cpuvcore mine loves voltage, idk if its like super %#*&$(# high leakage, but i have tested it as high as 1.7v with chilled air+water cooling and hit like 4.9 tops with 2 cores and not even being able to grab a cpuz lol. but will boot to windows
. otherwise it gets to 4.1 with all bios settings on auto (sabertooth). takes 1.48v (auto bios settings) minimum for 4.2 plus a small bump on the cpu-nb at which point it scales nicely to 4.4 at 1.55vcore and 1.35v cp-nb but at that point it also becomes a careful balance of CPU vcore and cpu-nbv for heat reasons, its way to easy to crank up the voltage and overheat.
on the same note my chip is very heat sensitive anything close to 50C (48c+) while heavily overclocked will mess it up.
all of these are stable enough for hours of gaming in Crysis 3, MWO, D&D NW. all will pass a cinibench most will pass a 32 mil hyper pi on a cool day. higher cpu settings tend to be ALOT
more stable at night with cool air from the window
. sadly i knew the day i got it it was a 4.5 (couldn't wait to see what it could do) so its mostly been optimizing that. however i often sadly find that 4.4Ghz with optimum settings is preferable to 4.5Ghz with looser settings. (my fsb doesn't scale to well past 4.4) and honestly it only ever is set on 4.2 at 1.5v for most games, only crysis 3 really demands moaaar lol.
CORE : FSB : DDR : TIMINGS : RESULT (average of the 4 cores)
4400C 2800FSB 1600RAM 9 9 9 24 33 1T 15.8 sec
4500C 2550FSB 1700RAM 9 9 9 24 33 2T 16.8 sec DDR1866 10-11-10-30-38-1T Same
4400C 2590FSB 1732 9 9 9 24 33 2T 17.4 sec
4400C 2550FSB 1680RAM 9 9 9 24 33 2T 17.5 sec
4350C 2550FSB 1700RAM 9 9 9 24 33 2T 17.850 sec
4400C 2800FSB 1600RAM 10 12 11 30 40 2T 17.9 sec
4300C 2800FSB 1600RAM 9 9 9 24 30 1T 18.17 sec
4350C 280FSB 1866RAM 10 11 10 30 40 2T 18.19 sec
4200C 2800FSB 1600RAM 8 8 8 20 27 1T 18.22 sec
4200C 2800FSB 1600RAM 8 8 8 22 34 1T 18.30 sec
4200C 2800FSB 1600RAM 8 9 9 20 27 1T 18.32 sec
4300C 2800FSB 1600RAM 10 12 11 30 40 2T 18.35 sec
4200C 2800FSB 1600RAM 9 9 9 24 30 1T 18.55 sec
4200C 2800FSB 1600RAM 10 12 11 30 40 1T 18.65 sec
4200C 2550FSB 1700RAM 8 9 9 20 27 2T 19.0 sec
4200C 2800FSB 1866RAM 10 11 10 30 40 2T 19.0 sec
4000C 2800FSB 2400HTT 1600RAM 9 9 9 24 33 1T 19.1 sec
4000C 2000FSB DDDR1333 7 7 7 20 20 1T 20.07 Sec
3400 3000FSB 1600RAM 9 9 9 24 33 2T 21.8 sec <-base 3000FSB ref
3400 2000FSB DDR1333 7 7 7 20 20 1T 22.8 sec <-stock ram settings in bios when plugged in
prior to this i did experimented greatly with the ram, again i have these http://www.newegg.com/Product/Product.aspx?Item=N82E16820231561
. i find that they work just fine even at 1.45v at ddr1600. to get them to work at ddr1866 all that was necessary was to manually enter stable timings and 1.5v into the bios, went off without a hitch.
when overclocking the cpu the ram tends to need more voltage (i find at least) if i want to keep tight timings and speed like the ddr1700+ it likes 1.55-1.6v. i have taken these modules up to 1.8v with no benefit, and a few hours of it didn't seem to hurt them either. but i didn't like it and it didn't let me break DDR 2000 so that was a nogo for me. they like 1.7v maybe a little more maybe a little less. but they do not scale well at all past 1.7v and even 1.65 doesn't seem to do much compared to 1.6v . 1.75v is what it takes to hit DDR1960 stable on my modules. looser timings, hours of playing, little increments to voltage and other settings, idk they don't want to budge an inch past DDR1960 for me lol.
basically no overclock setting uses the DDR1866's+ raw speed at all. maybe a Thuban or Bulldozer will. i always got better results with 1700 and tight timings compared to higher clocks. i have gotten this ram to DDR 1960 at 11-12-11-30-40-2T with no appreciable benefit even up to 4.4ghz and 3000 FSB.
i find a small (but definite gain) in using 3000FSB over 2800. overall the most important things seem to be tight RAM timings, keeping the speed between DDR1600-1800,a 2800FSB to me is the "sweet spot", and CPU core speed 4ghz+ will produce the best overall results.
slowly just keep playing with settings. it makes for a good analysis of perf with different variables. will try to grab some more with the 3000FSB but that's always required more "fiddling" then usual......... at least. winter is coming
so we shall see.
it should be noted on my Asus M....something AM3 mobo i could hit 4.4 (was not stable) with this proc with a CM evo 212 and some wintec 2Gb DDR1600 modules. (that topped out at DDR1980
reservoir modded Thermaltake Water 2.0E with push/pull corsair SP's
Phenom II 965 C3
32GB Gskill Ares DDR3 1866
Asus Sabertooth 990FX Rev1
Asus GTX 660 @ 1200C 7000Mem
C70 modded for water cooler (fill port on the top, drain plug on bottom)
Corsair force 3 60gb
2 2Tb Seagates
FSP 850W Aurum Pro
#$$#ton of fans
and i personally have built 3 other amd 965 C3 rigs post 2012 for my friends, and all
four of them could hit 4.4ghz stable in my rig, mine and one other could hit 4.5+. http://valid.canardpc.com/show_oc.php?id=2573007
super old cpuz with the old ram and the sabertooth, 1 stick of ram http://valid.canardpc.com/show_oc.php?id=2556213
. its sad that the memory controller drops as you push it. oh and my old rana x3 that unlocked to a x4 http://valid.canardpc.com/show_oc.php?id=2405180
sadly its long gone (i know my OCN tag wasn't used, but it was my chip and that's my overclock)Edited by Mellifleur - 10/13/13 at 11:02am