Originally posted by: freudianguy
I just wanted to know if I am overclocking my rig in a proper way, since this is my first rig being overclocked. I am using the stock hsf (4 pipes). I have ran prime95 for about two hours with no problems at all; however, my computer crushes an gives me the Windows blue screen once in a while. The cpu reaches temperatures of about 47C most of the time, and reaches 48c rarely. I am concerned that I might have to lower the cpu's frequency to, perhaps, 2.5 Ghz, but I prefer 2.6 for now. The numbers are the following:
11x238=2618
running a 183 divider T1 2.5-3-3-6
htt=4x
Vcore=1.42v
Am I using the right numbers? Do I have to run a 166 divider instead of a 183?
A computer is not considered stable unless it can do Prime95 for 24 hours straight.
I assume (heh, I said 'ass'
) you have PC3200 RAM? Let's take it from there.
200/183=1,09
200/166=1,20
And let's take your frequency: 238 MHz.
238/(200/183)=217.77 MHz
238/(200/166)=197.54 MHz
217 MHz is a no-go if you have budget RAM. You might want to try and loosen the timings, and let it do MemTest for ~24h.
197 MHz should go fine, because the standard PC3200 frequency (in fact, the only frequency) is 200 MHz. Since 200>197, it should work fine. You might even be able to get some tighter timings out of those.
With your chip and board, it might be smarter to push a higher HTT and a lower multi, so that you'll have less problems with your memory.
Let's see: A desired frequency of 2.6 GHz = 2600 MHz
A max multiplier of 11x
PC3200 RAM
2600/11 = 236 MHz HHT
2600/10 = 260 MHz HTT
2600/9 = 289 MHz HTT
2600/8 = 325 MHz HTT
I think your board should be able to reach a 325 MHz frequency, but let's assume it doesn't. That rules out the 8x multi.
Also, let's assume (heh, I said ass again
) that your board has the following memory deviders. I'm not sure which one it has, so let's just take the most common ones. (You also stated that you had a 183 devider.)
200
183
166
133
100
Well, let's take all the possibilities, shall we?
The 9x multi:
289/(200/200)=289 MHz
289/(200/183)=265 MHz
289/(200/166)=240 MHz
289/(200/133)=192 MHz
289/(200/100)=145 MHz
The 10x multi:
260/(200/200)=260 MHz
260/(200/183)=238 MHz
260/(200/166)=216 MHz
260/(200/133)=173 MHz
260/(200/100)=130 MHz
The 11x multi:
236/(200/200)=236 MHz
236/(200/183)=216 MHz
236/(200/166)=196 MHz
236/(200/133)=157 MHz
236/(200/100)=118 MHz
If I were you, I'd go with any of the bold ones.
If the outcome of the calculation is under 200, you can use tighter timings or lower voltage (saving you in cost, keeps your PC cooler).
If the outcome of the calculation is above 200, you can loosen the timings or increase the voltage (increasing the performance, lowering the life expectancy).
I hope this was clear enough
.
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