Anywho, my a64 overclocks to 2.4 quite easily, but I have to decrease my memory speed to 266 (3-5-5-10 @2.7) or 200 (2-2-2-5 @2.7) in order to get it to this speed. Now here comes the question, is a 600mhz overclock worth a 133 loss in memory speed?
The best of my system specs –
AMD athlon 64 3000 (939)
Asus A8V deluxe (rev 2.0)
Kingston hyperx PC2700
Neo power 480
PS. is there a way to overclock my ram with out overclocking my htt?<P ID="edit"><FONT SIZE=-1><EM>Edited by songoku on 10/18/04 09:22 AM.</EM></FONT></P>
lock the cpu/memory ratio at 2:1 for A64 HTT systems. That would force ram to run at default DDR400 speeds. Some motherboards come with PCI/AGP locks which helps keep overclocking more stable. Asus K8V deluxe for example uses VIA KT800 pro chipset which includes these features. Also, I recommend Corsair LL XMS ram 2-2-2 timings or PC4000 ram Ballistix or Kingston HyperX. I would not sacrifice any speed on ram for lower timings.
Athlon 64 system are not bottlenecked by their HT link. You can try to run benchmark at different HT multiplier, you will see that the HT speed have not much influence in most benchmark. the HT speed is more than enough for HDD, GPU and PCI cards access!
So use your favourite benchmark, if you are a gamer, use a game timedemo and write down your results.
And I'm pretty sure you can change your memory ratio, you probably have a menu in your BIOS that fix the ratio between your RAM and the HT. Usually hte slection will be something like : 133%, 100%, 83%, 75%, etc.. or 1/1, 3/4, 5/4, 5/6, etc...
So, you can get the most of your ram. You can also mess with your HT multiplier.
Ex : 4 x 200 = 3 x 267
The third option is to lower your CPU multiplier to get higher FSB and use it in combination with the memory ratio.
HT = 4 x 200
MEM = 100%
MULTIPLIER = 10
Result : 2000MHz @ DDR400
HT = 4 x 222
MEM = 83%
CPU MULTIPLIER = 9
Result = 2000MHz @ DDR366
HT = 4 x 250
MEM = 75%
CPU MULTIPLIER = 9
Result = 2250MHz @ DDR400
Now for the next problem. On my motherboard (asus a8v deluxe), any fsb change over 250 deosnt work. The board refuses to boot up, but with the same settings and the fsb at 249, everything works fine. Is there a work around or a fix for this?
<P ID="edit"><FONT SIZE=-1><EM>Edited by songoku on 10/31/04 08:18 AM.</EM></FONT></P>