i got this board yesterday (skt754) and can't get it to Overclock at all have set HTT to 4x, running ram at auto as my Geil value will run happily at 230fsb, vcore set to 1.6v and ram at 2.8v. the system won't even post at 204fsb , if i try using CoreCenter then the system just freezes/locks up can anyone help me out here???? thanks
Might be worth setting the memory timings manually. Also, give 2t a shot and see if that works any better for you. Whack the 166 memory divider on there as well, (if its not already on) and see if that helps things at all also.
Try just increasing the Multiplier and lock the memory, and maybe slackening the memory timings. What temps are you getting? Dunno if this will help
I even tried OCing this board, I didn't get too far either buddy. But I was a complete n00b to A64 when I tried,s o that might be it.
what did you change then, was about to give some pointers, but see if you did what i did with the mobo (effort)
set Optimized settings, then disabled SATA. now sitting comfortably at 9x250 @ 44oC full load will try further a bit later thanks for the help
right, just enabled SATA and no lock ups so far temps are down to 30oC - cpu 44oC - NB cpu not even reaching 40oC under load : looks like you have to set 'Optimized settings' and then adjust the bios to your specific requirements, i've never had to do it on any other board so i totally over looked that as for disabling SATA, i always do that as i don't have SATA drives (habit) thanks RobbieGSM, happy with the board
im having the same problems, iv got a socket 939. iv changed the types of overclocking but nothing. what settings is it that you change in the bios
Firstly ensure you have the latest BIOS and avoid the nVidia "SW IDE" & NIC/ActiveArmour drivers. In the BIOS disable anything Spectrum, set Optimal not Agressive (CPU Mode IIRC), set o/c'ing to Manual (not Auto/Dynamic), set the HT Multiplier to 3x, set RAM to 133mhz (200mhz RAM @300HT) or 166mhz (200mhz RAM @240HT), set RAM timings to no faster than 2.5-3-3-8 and maybe even try T2. Ensure you only use the first 2 SATA as it's common for nVidia nF3/4 mobos to only lock these ones. Then just up the HT speed by 5-10mhz at a time and use Prime's Torture Test or similar to ensure you're stable before going higher. Until it becomes unstable leave CPU voltage stock (might as well put RAM at 2.7v minimum), if you want to be safe add no more than 0.05v but IMHO certainly avoid more than +0.1v. See where your mobo & CPU can get first and then see how far you can push your RAM afterwards. You may find Windows o/c'ing tools very useful, try nVidia's nVmonitor, A64Tweaker and ClockGen.
2 of the SATA ports on the neo2 (and all NF3's afaik) arent locked while the other 2 are. IIRC its sata 3&4 which are ok, and 1&2 which arent locked - is the 2 nearest to the PCU on the Neo2
That sounds confusion! on my Nf7 or u had to change for to over clock the CPU was multiplier and bus speed. but doesn't show this on this bios I have a athlon 64 dual core 3800+ cpu
There's been a few thread on o/c'ing A64 but to cover it semi-breifly. The memory controller in built into the CPU now so there's no need to keep the RAM 1:1 when you o/c. There is still a kind of FSB called the HT which runs at a multiplier, by default 4x200=800mhz for Skt754 & 5x200mhz for Skt939. So long as it's kept 500-1000mhz it doesn't matter. A64 are locked for higher multipliers but not for lower ones, BTW avoid half multipliers. To set your BIOS for o/c'ing disable all Spectrum, disable all Auto/Dynamic o/c'ing and use Optimal rather than Agressive modes. First you want to see how fast the CPU & HT can run and then concentrate on the RAM. To do this set HT multiplier to 3x (keeps HT normal up to 3x333=1000mhz), RAM setting/ratio to 133mhz (keep DDR400 in spec up to 300mhz HT), set RAM timings high (eg 2.5-3-3-11 T2) and RAM voltage to around 2.7v. From here you can raise the HT in 5-10mhz steps and test each time with a stressing program to ensure it is truly stable. When you hit the limit try adding 0.05v to the CPU up to a maximum of +0.1v over default voltage, bear in mind extra voltage produces a lot more heat. You can drop the CPU multiplier in order to test the maximum stable HT speed your mobo can do, eg. change 10x240=2.4ghz to 9x245=2.2ghz. When you have the maximum CPU & HT speeds you can then test your RAM and work out the optimal settings for all three. So IIRC your CPU is a dual-core running at 10x200=2.0ghz with the HT set to 5x200=1000mhz and the RAM running 1:1 with HT (200mhz DDR400 setting in BIOS).
same with my neo2 s939 board, the sata boards nearest the agp slot were the only usuable sata ports while overclocked, its annoying and awkward that no sata lock was in place while overclocking... saying that tho it was by far the best agp s939 overclocking board ive ever owned, and ive had 7 :O
Enter the BIOS and disable all Spectrum, disable all Auto/Dynamic o/c'ing and use Optimal rather than Agressive modes. Next find the HT Multiplier (notation varies) and change it from 5x to 4x (or 3x if you exceed 250mhz HT Speed). Find the RAM setting and change it from "200mhz / DDR400 / PC3200" to "166mhz / DDR333 / PC2700" (or if you intend to exceed 240mhz HT speed use "133mhz / DDR266 / PC2100" which is good up to 300mhz HT speed). From now on all you need to do to o/c is up the HT speed. If you want the CPU=2.2ghz set it from 200mhz to 220mhz and test it is 100% stable by running something like Prime95's Torture Test (select maximum FPU stress test). You can then continue to increase HT in 10mhz steps again testing each time it is 100% stable. Without having to mess with voltages or anything else you should hit around 240mhz (2.4ghz or equal to an Athlon64-X2_4600+). Basically when you are no longer 100% stable drop back to the last stable speed or more ideally just below it. Running Prime95 for 20-30min is fine whilst upping the HT but when you decide on your final o/c you should run it for 12-24 hours to be thorough. If you're sure cooling is adequate you can up the voltage by 0.05v which should allow your CPU to clock higher at the expense of additional heat and stress. ie. when your CPU becomes unstable at a given speed you can try the extra voltage which should stabilise it and even allow it to go a bit further still. So just to cover it you have a CPU multiplier (10x which can be lowered) and a HT Speed (much like a FSB, 200mhz) and the CPU speed is calculated by these two multiplied together, ie. 10x200=2.0ghz. The HT is the link between the CPU and the rest of the motherboard and has its own multiplier (5x200=1000mhz). Finally your RAM is usually set by default to equal the HT so 200mhz HT means 200mhz RAM which for DDR is DDR400-PC3200. To o/c you need to increase the HT Speed and to ensure everything else runs at normal speed you decrease the HT Multiplier and set the RAM to run slower than HT rather than equal to it. Here's an idea for your o/c's ... 10x200=2.0ghz CPU ... 5x200=1000mhz Total HT ... DDR400-PC3200 means RAM equal to HT. 10x220=2.2ghz CPU ... 4x220=880mhz Total HT ... DDR333-PC2700 means RAM 83% of HT speed (so @220 PC3000 speed). 10x240=2.4ghz CPU ... 4x240=960mhz Total HT ... DDR333-PC2700 means RAM 83% of HT speed (so @240 PC3200 speed). 10x250=2.5ghz CPU ... 4x250=1000mhz Total HT ... DDR266-PC2100 means RAM 67% of HT speed (so @250 PC2700 speed). 8x300=2.4ghz CPU ... 3x300=900mhz Total HT ... DDR266-PC2100 means RAM 67% of HT speed (so @300 PC3200 speed).
