ASUS P5N-E SLI 650i Thread

[jaihenwood]

i think my problem is i've read that 1:1 linked memory is better but it seems to be easier to over clock (so far) if i unlink the memory.

i'm off to bed enough for tonight i'm at 3.375 Ghz im happy
vcore at 1.5
Rated FSB = 1500 MHz
my memory Frequency is 400Mhz (800 Mhz in bios setting) now my memroy should handle double this right? it should beable to keep up with the FSB and be linked 1:1?

[dpawl31]

If you link your memory, you'll be running 375Mhz. (DDR2-750, that is your BIOS #)

No your memory can not handle double that. That would be DDR2-1600, which doesn't exist lol.

You can however OC your RAM... which will be when you go over 400FSB with the CPU and 400Mhz RAM (800 BIOS)

DDR is Double Data Rate, which is why your 400Mhz is really DDR2-800

It isn't the fact linked or unlinked, its the 1:1 ratio. Your FSB is at 375 which if you run linked 1:1, so will your RAM. This will give you stability, instead of your 375:400 divider... which is really a 15:16 divider. Very close to 1:1 which is why you have go so far already. If this is your max OC for your CPU, leave it at 15:16 because running your ram faster than CPU gives you a slight performance boost. I am running 5:8, but I haven't found my max OC for my CPU yet and I run stable at 5:8.

[exnihilo]

I'm running (very) stable at:

cg

[jaihenwood]

should exnihilo be running command rate 1T or 2T?

another note about this board is the Hyper 6+ back plate doesn't fit. but you can use the platic washers and it still mounts just puts preasure on the board. so i'm just going to keep my Mother board flat.

[jaihenwood]

Originally Posted by http://www.overclock.net/overclock.php?file=articles/overclocking-guide.htm

Finding the max FSB for your motherboard:
1) Insure you have good or sufficient cooling for your CPU!

2) Boot into your BIOS settings.

3) Lower your multiplier to a low setting (5-8).

4) Raise your memory timings, and/or change your CPU/memory ratio so that your memory’s FSB is always at/below it’s rated speed. This should insure that your memory won’t be limiting your FSB, just your mobo.

5) Disable useless BIOS features (depends on your mobo, but CPU speed spectrum, throttling are common ones).

6) Increase your mobo’s voltage (vdd) as high as you safely can. Most motherboards don’t allow you to increase your vdd more than is safe (1.6v-1.7v or higher w/ a decent northbridge heatsink). When in doubt search Google.

7) Increase your system FSB to 10-15mhz above it’s rated speed. Always make sure your PCI bus speed isn’t too high before you SAVE and exit your BIOS.

8) Then see if you can boot into your operating system. If your computer boots into your OS, and doesn’t restart, or lock-up, increase the FSB by another 10-15mhz.

9) Continue until your computer reboots unexpectedly, or locks-up. When this happens go back into your BIOS and lower your FSB by maybe 5mhz and try again (if that doesn’t work, lower it some more).

10) If you tried a FSB high enough, you may not be able to get back into your BIOS to lower your settings. In this case, you have to use the jumper located near the battery and CMOS chip of your motherboard. Move the jumper from its current pins, to the only other possible position. Then after about 5 seconds, move it back to it’s original location. If you don’t have one of these jumpers, take out your battery for 1 hour or so and then put it back in. You will now be back at default settings. So you must reset everything to where you were just before you hit trouble.

11) Once you are back into your OS open prime95 (which you have already downloaded and installed from here). Then start the “torture test.” This will test your system for stability. Since we’re only testing out the mobo, once torture test has ran continuously for 4 hours with zero errors/reboots/lock-ups, your FSB is stable. If you get an error or crash, lower your FSB by 1mhz or 2mhz. When running the torture test, check your CPU's temperature. It shouldn’t be above 45C MAX since you lowered your multiplier and is probably running below stock clock speed. As mentioned earlier use a program like MotherBoard Monitor to monitor your uhh... motherboard.

12) You now know and can now write down your motherboard’s max FSB

has anyone tried this? this is really first step right?

[trekman]

My PC still wont boot with 4Gb of ram "4 sticks of 1Gb Ram" its not the ram its the Bios. some guy is also having the same problem on the Asus forum. I hope Asus fix this problem soon. I installed Vista and its a Memory hog thats why I want to install 4GB of ram

[Digikid]

Wrong thread dude...I think....ah well.

Now I am scared to overclock. Is it really worth it?

[k!D$*W/*gUN$]

Originally Posted by Digikid

Wrong thread dude...I think....ah well.

Now I am scared to overclock. Is it really worth it?

fo sho, its worth it!!!!!!


steve

[dpawl31]

I'm running (very) stable at:

Yeah I am not saying dividers besides 1:1 are unstable.
1:1 just offers best stability during the OC process. That way you know it isn't your divider causing the instability.

Can I ask why your RAM is not running @ 400Mhz? What prompted 391mhz?

[dpawl31]

My PC still wont boot with 4Gb of ram "4 sticks of 1Gb Ram" its not the ram its the Bios. some guy is also having the same problem on the Asus forum. I hope Asus fix this problem soon. I installed Vista and its a Memory hog thats why I want to install 4GB of ram

As far as I know, your OS must be 64 bit to recognize anything over 3GB or RAM. I believe all 32BIT OS's won't recognize anything past 3GB.

Try just 3GB...