Can this limit a CPU overclock?

E

erorr404

Gawd
Joined
Jan 30, 2005
Messages
646
i have a quick question. can not enough PSU amps on certain rails limit how far you can overclock your CPU (if you're using stock voltage), AND, can high memory timings limit it? thanks :)
 
not really, but it can assure a very unstable overclock, very unstable, speicaly if you bump up Vcore...........but yeah, if you oc, you need a good quality psu, in general you need one, but more so for oc'ing than not


soulsaver_8229
 
what about timings? i heard looser timings dont allow as high a CPU overclock as tight ones. is there any relation between timings and CPU FSB?

the reason im asking this is because my CPU overclocks much higher on another system with low lat and a slightly better PSU. im thinking it's just the crappy SiS motherboard on this system, but i just want to be sure before i buy a new one.
 
looser the timings the higher the FSB will reach, the tigher the timings the faster the ram runs.
 
sorry i should have been more clear. i didnt mean RAM freq, i mean strictly CPU freq. lets assume my RAM is underclocked (via divider) and has no trouble doing tight timings. will i be able to clock the CPU higher with tight timings, or is there no relation between max CPU clock and RAM timings?
 
the ram and cpu runs off the same FSB.

ex. 250 FSB X 10 = 2500 ghz cpu speed and 250 fsb on ram with whatever timing on a 1:1 ratio. If you do like 5:6 ratio then it'll be 250X10 = 2500 ghz cpu and like 240?fsb on ram. I hope this is clear :(

when you say timings, you should only speak of ram, there is no CPU timings.

I can't think strait right now, i hope i'm making sense
 
erorr404 said:
sorry i should have been more clear. i didnt mean RAM freq, i mean strictly CPU freq. lets assume my RAM is underclocked (via divider) and has no trouble doing tight timings. will i be able to clock the CPU higher with tight timings, or is there no relation between max CPU clock and RAM timings?
Click to expand...
there is no relation between cpu clock and ram timings. ram timings are only a ram thing.
 
soulsaver_8229 said:
not really, but it can assure a very unstable overclock, very unstable, speicaly if you bump up Vcore...........but yeah, if you oc, you need a good quality psu, in general you need one, but more so for oc'ing than not


soulsaver_8229
Click to expand...
currently i have an Antec Smartpower 400W (SL400) PSU:
+5V 38A
+12V 18A
+3.3V 28A
that cant be causing instability just a few MHz overclock, can it?
 
i'll test it with another PSU then, but if it does turn out to be the problem, what PSU do you guys recommend? i want a 24-pin one so that i wont have to replace it again in the future when i get a new mobo, are there any good ones that are cheap?

would this one be good? why's it so cheap, crappy company?
 
erorr404 said:
i'll test it with another PSU then, but if it does turn out to be the problem, what PSU do you guys recommend? i want a 24-pin one so that i wont have to replace it again in the future when i get a new mobo, are there any good ones that are cheap?

would this one be good? why's it so cheap, crappy company?
Click to expand...
its shit.

look for enermax, antec, ocz, fortran, sparkle, pc p&c, zippy, cooler master, tagan, or seasonic.
 
bump.
can it be the 18A on my 12V rail that is limiting my CPU overclock, causing instability when changing RAM timings and voltage, and just making the computer very unstable even if i only overclock a couple of MHz.
 
erorr404 said:
bump.
can it be the 18A on my 12V rail that is limiting my CPU overclock, causing instability when changing RAM timings and voltage, and just making the computer very unstable even if i only overclock a couple of MHz.
Click to expand...
yes.

i think its more that you have a SiS board though.
 
erorr404 said:
i think it has to be one or the other ;)
Click to expand...
looks like its the motherboard. i plugged in a PSU with 24A on the 12V rail and it behaves exactly the same.. unstable with a very small FSB increase.
 
You must log in or register to reply here.
Back
Top