E5300 overclockers club - Page 7

..well...

Its a step in the right direction but the temps are a bit high for an overclock to 3.25Ghz,

99% of the E5300 CPUs on this forum can hit 3.6Ghz and get around your temps,
My E5300 has a max temp of 58 @ 3.5Ghz after 8hours of Prime95 testing
so maybe you need a better case ventilation/cooling or you are giving your CPU more Voltage than needed

as a general rule, @ 3.25Ghz to 3.5Ghz, your bios Voltage should be between 1.298v and 1.312v max

1- Whats your V-drop in CPU-Z and what is your bios V?
2- What motherboard are you using?
3- what are your settings for MCH v and CPU Termination?
4- do you know that your CPU will be faster if you lower the multiplier and increase the FSB speed? example 10.5x310FSB is faster than 13x250 because you are increasing your CPU's Bandwidth by increasing the FSB speed
5- you said that your had a crash when you set your FSB to 270, but 270x13 = 3.5Ghz and you may need to apply more voltage to your CPU, try to set your CPU v in the bios to 1.325 or just a bit more until you get stable OC, a crash a 270 doesn't mean that you hit your CPU's limit, in other words, i highly doubt that your FSB wall is 270 cause the E5x00 hit their FSB wall somewhere between 320 and 350, but the only way to hit an FSB wall @ 270 is if your MB is really..and i mean REALLY crap..



For example, I have a v-drop of 0.05 and a v-droop of 0.03

So right now i am running the CPU v in the bios @ 1.312 so my v-drop is 1.26 and a v-droop (under prime95 stress testing) of 1.23,
Edited by omari79 - 1/28/10 at 7:21am

(you don't..v-drop is not an option, its a definition)



A- V-drop: is the difference between the CPU v you set in the bios and the CPU v after you enter windows (open CPU-z to see the CPU v under windows) this is what v drop is

example: If i set my CPU v to 1.35v in bios and i boot to windows then open CPU-Z and see my CPU v @ 1.31v, it means that i have a V-drop of 0.04 (1.35-1.31 = 0.04v)



B- V-droop: is the difference inside windows between the CPU v reading when the CPU is not doing anything (ideal) and the CPU v reading when its under heavy load

Example: open your CPU-Z when your CPU isn't doing anything..let say the CPU v reads 1.31v...NOW....keep CPU-Z open and run Prime95, you will see that the CPU v reading in CPU-Z has dropped from 1.31v to say 1.29v, in this case, your V-droop is 1.31-1.29 = 0.02v, now we say that your CPU has a V-droop of 0.02v

Got it?


Question: why is V-drop important?
Answer: because its the actual voltage that your CPU is operating under

Example: the E5300 has operating spec (CPU v) between 0.96v and 1.362v so going over or under these spec will start damaging your CPU, BUT....if you set your CPU v -in Bios- to 1.40 and you have a V-drop of 0.04v then your CPU v reading in CPU-z will be 1.40-0.04 = 1.36 and this means that you are still within your CPU's safe operational limit even if your bios v is 1.40

clear enough?
Edited by omari79 - 1/29/10 at 1:50am

Nice speed but your CPUID hardware monitor is showing the following temps

cores around 47 max
CPU around 60 max

are these your temps during prime 95 testing? can you post a screen with prim95 running and your CPUID hardware monitor next to it?

never...ever...set somthing like a CPU v on Auto....unless you want a fried chip....

PM me on SKYPE, Username: e.omari79