Originally Posted by Towlieee
I can't even get 202mhz FSB to take my memory past 1600 speeds.
Currently running G.skill ddr3 1600 @ 8-8-8-24 @ 1.61v perfectly stable... However if I drop my CPU speed down, drop my HT and NB, and take my FSB to 202, it wont even post.. And thats with 12-12-12-30 @ 1.65! with the cpu and NB underclocked slightly.
Also I can't even begin to get stable JUST overclocking the CPU and leaving the memory at 1066, with the my cpu at 1.55v I can't get 3.8 stable! c3 965 with liquid cooling... I can boot into windows and play games fine at 4ghz at 1.6v, but wont even prime for 2 minutes at 3.8ghz at 1.55... And crashes instantly if I prime at 4ghz at 1.6v..
I haven't even began to mess with the north bridge, I always spend about a hour just trying to get a stable 'decent' overclock and it seems like I get terrible speeds compared to other people, then I just go back to stock and give up for the day
Just tried again, same settings, at 201, and 200. 201 wont even post, 200 makes it to bios, but says bad checksum error and gives me option to enter setup or load default values and continue... Only settings I even have adjusted are cpu droped from 3.4 to 3.2, NB at 1800, and ht at 1800, and memory running 1600@ 12-12-12-30 @ 1.65
1.) Your CPU-NB is the IMC if you didn't know. (Integrated Memory Controller) It's frequency shuold be "At Least" three time the Speed of your Ram for proper performance! Which means that if you have Ram @ 1600Mhz (It's really 800Mhz like it says in CPU-Z) the CPU-NB should be at least 2400+. The Voltage range on the AM3 Phenom II's is from 1.15v to 1.3 (Stock).
2.) I can tell you right now that you don't have enough voltage on that Ram. AM3 Phenom II's, for some reason, need a little more juice going to the Ram. I thinkt hat it's mostly due to the fact that the Dram also acts as an "Auxilary" Voltage for the IMC. So normally it's a good idea if you set your Ram votlage to at least .05v Above it's Minumum Rated Voltage (Stock). Sometimes it may need more. But before you give it more than the typical +.05v try adjusting the CPU DDR-PHJY Voltage (setting right above the Dram Voltage) to 1.25v to see if that aids in stability first.
And from what I hear be careful of adding anything above 1.55v to this CPU. I'm not sure if it just flat out causes to much heat or if it just to much voltage. Spec might know.
Originally Posted by solidsteel
got this motherboard a few days ago in my first computer build. I have a XFX 5870, can it go into any one of the four PCI-E slots? I only have room for it in the 2nd slot down, and I read in the manual it was a PCI-E x8 slot not x16 slot. If im only running ONE card will it run it at x16 in any slot??
Heres the pic so you can see where I put it:
I know its messy but I did the best I could with the cables, it's my first build and I'm 15.
Nice looking tower you got there Bud! Okay, IIRC, all Video Cards under the 5870 will not utilize the even the Full x8. An ATI 5870 will and only go about 2-3% above that which is not even enough to notice. BUT, luckily, Slots 1 and 4 (the 3rd PCI-E blue slot) Supports x16 operation... So you should use that one. Might want to mount the Stock AMD CPU fan to you NB/MOSFET heat sink right over the NB to aid in cooling being that those card produce wuite a bit of heat off of the top of them as well.
Originally Posted by Towlieee
Right on I'll give that a shot tomorrow when I'm back home
Is there any chance memtest is somehow messing up? Is there a good in windows memory tester? It always fails at the exact same point in memtest on all settings. But I guess that still doesn't explain why it failed to post at 201 lol
Just to clarify, to simply test my max memory mhz, I just need to drop my NB multiplier so I don't go over 2k, drop cpu multiplier so I don't go over stock clock, and HT so it doesn't go over 2k, then just set manual voltage and adjust the FSB? (all timings on auto, or just set at a lot higher settings then what the memory is rated)
I've been overclocking for a good 5-6+ years, just haven't done much reading on it in 3+ years, and haven't spent time overclocking multicores yet.. Been out of the loop a long while and a lot has changed
First set your CPU-NB to 2400-2600Mhz, the CPU-NB Voltage to 1.25-1.30v and the NB, (edit
)HT Link and SB Chipsets Volts to 1.25v leaving the CPU at stock speeds and +.05 voltage for now. Remember your focusing on Ram Speeds but the raise in Mhz on the HT Ref Clock (What used be the FSB but it's different now) will need some extra volts above Stock.
1.) You want to start off by having your Ram in the Blue Slots on the Motherboard, especially if you want higher frequencies. Being that DDR3 Ram has on Die termination now you want to make sure that you have the ram installed in the Farthest from CPU Slots to Avoid and Signal Ringing that could cause instability. It's like a Nike Commercial... "Just Do It!" lol
2.) You want to have your CPU-NB (IMC) 3 times the speed of your Ram. Ram @ 1600= 800mhz x3 = 2400 CPU-NB or greater!
3.) Go into "Advanced Dram Config" in Cell Menu and Change the DCT Mode to "BOTH" Not DCT1 or DCT2. BOTH. And set the Ram setting Manually (LOOK at number 4 below.
4.) Start @ Ram Strap 1:4 (Setting right above where you read your Ram speed in the Cell Menu), Raise you timings +2CL. So, if Ram is Stock @ CL 8-8-8-24 @ 1.60v, set it to 10-10-10-30 @ 1.65v and add a few MHz at a time, Testing using Prime95 Blend Mode until you reach an instable frequency.
If you can't get past 200 with stability, then you need to forget about ram, lower it down to 1066 or less and focus on how high you can get your HT Ref Clock (the 200mhz). because without that, you won't be able to go any higher than 1600Mhz on your ram.
If you would rather know for sure, go ahead and start with the HT ref Clock Max Mhz before the Ram. That way it out of the equation....
Hope this helped and good luck!
What version of Memtest are you using? I think that the best one right now for DDR3 is Memtest 4.0, IIRC.Edited by Mastiffman - 1/8/10 at 11:14pm