I've been playing around with my Ph II 945 and it seems to bee a quite good overclocker. I've come up to here, just a notch above stock voltage:
I'm using MSI K9A2 Platinum board (790FX/SB600/DDR2), got the fsb up to 250 and the CPU multi down a bit to 14. Can't do more because I'm still using the stock cooler. I'm getting a better one and I'm wondering how far up I'll be able to go. I've read someone getting it to 3,7. Did anybody go higher than that using such a CPU?
OK, so installed the cooler and I'm at 3625 with 1.416 volts. It seems fine but I have to do some stress testing to see how stable it really is.
@saint; I can go above 1,5V with this board. Values above 1,5 are just painted red as a warning that the CPU could get damaged.
Not sure what to do with HT link speed (and HT voltage). Almost everybody writes HT link should remain at 2000MHz but I see some performance gains if I let it rise to 2500 along with the FSB. I got a serious cooler on both 790FX and SB600, connected with heatpipes, gues it should be put to some use.
I OC my 945 to 3.7 GHz, cpu cooler is Noctua NH-U12P with 2 fans. I think Volt is 1.421 but not sure about it, I am completely noob when it comes to OC, Volt etc.. But I can tell you one thing, running @ 3.7 full load my CPU temp is max 45c.
Before with the custom fan without oc the temp @ full load was something like 64-65c.
I know this cpu can handle more, I just dont know what to do with those volts in BIOS.
CPU: AMD Phenom II x4 945 3.0 GHz
Motherboard: MSI 770-C45
RAM: G.Skill 4GB DDR3 1333
HDDL not exacly sure I think 7200RPM 6400GB.
Supply 700 Watt
Graphics card: Radeon XFX HD 4850 1GB DDR3-5 not sure
After OC CPU to 3.7 GHz I run some test AMD Overdrive 1 Hour All test passed full load temp 44c
and played Counter-Strike Source all night long xD without any errors.
I hope someone is able to help us, please dont let this topic die!
As long as your HT speed is faster than you memory speed you are fine --- so you may easily drop the HT multiplier to x9 or x8.
The NB/IMC is a whole different animal. For each 10% increase in NB/IMC speed, memory bandwidth is increased 3-4% and latency is reduced 3-4%. This more than makes up the difference in speed between dual- and single-channel RAMs.
I don't want to burst yer bubbles - you guys are doing great - but your NB/IMC speeds are at best, average. 2700-2800MHz is good --- the guys at XS have pushed beyond 3000MHz so that gives you an idea of the work ahead.
The issue on the MSI 790FX is you may not be able to tweak the NB voltage (at least on mine). In my BIOS version it can't be adjusted and with AOD it just won't stick. Not sure about the MSI 770 NB voltage settings. At a minimum see what you can do with the x11 multiplier.
G.skill 4 gb 1600. I don't think it is because of ram, maybe you are doing something wrong. Try to set Memory to manual set your cycles, for example I have 9-9-9-24, you will find these numbers on your ram stick. Also Disable C1e and Amd Cool and Quiet...
Hey everyone i have a ? There is something thats really bothering me that happens when i overclock my system. If the cpu load goes over 22% the cpu FSB will drop but the core volt dosent, and the other thing is it wont go over 45-50c-( 3.75GHz @ 22c room temp) under a stress test or benchmark but if i run prime it will crash in about 3sec. This will happen if i overclock higher than 3.2ghz. This is really odd to me any thoughts?