I have a SOYO DRAGON Plus KT266A with an XP 1800+ currently burning in at aprox 1.7 GHZ (12*142) at default +.100 (1.85V) using a Swiftech MCX462 with 5 case fans (I know, sounds like a jet aircraft)! I am considering doing a voltage mod on the motherboard to get more out of her.
Have any of you done this mod on any of your motherboards with XP processors? I would like to get an impression of what I can expect if I do the voltage mod.
Please specify cooling methods and processor steppings.
THANKS!
Current Main Rig:
AMD FX55 @ 2.9 GHz
2 GB PC 3200 DDR RAM
ABIT KN8 SLi motherboard
ATI X1900XT O/C to XTX speeds
Mine is a MSI K7T266 Pro2 (non-raid) with an XP 1800+ and a vantec FCE-62540D HSF (rheostat installed on the fan). A total of 6 case fans for the jet plane effect, only used when my case is all sealed up otherwise I don't use any.
Right now running stable at 11.5x150=1725MHZ~2100+ speeds. There was some problems unlocking the chip, so it's still stock multiplier. Running at 1.85 Vcore and I think the ram is holding me back. It only runs at this speed when I set the ram bus to Hardware Clock -33.
I need a site that shows how to volt mod my board so I can be sure it's the RAM though
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This is probably what you are looking for, if your MB uses the standard voltage regulator chip. This is the cleanest and best worded voltage mod I could find: http://www.mods4me.com/reviews.php?o...nt&id=7&page=1
Current Main Rig:
AMD FX55 @ 2.9 GHz
2 GB PC 3200 DDR RAM
ABIT KN8 SLi motherboard
ATI X1900XT O/C to XTX speeds
My board uses a voltage regulator made by SC. I thought that the chip I have was more widely used than the HIP chip, but maybe that's just on older (KT133A and older) boards, even though it pushes the same juice. However, I have pushed the Vcore to 2.35v, but that was using my watercooled peltier. I never let the temp get over 21*C under max load when I was doing this to burn it in...which ended up dropping my temps by 8*C. I now run my chip at 1.55v. I would not really recommend anything over 2.0v unless you have good cooling. I have also done an IO voltage mod on my board, allowing me to select up to 4.0v...which didn't help my memory hit any higher FSBs!!! I'm mad! At least I hope the problem is memory-related and not motherboard-related. I'm using PC133 RAM rated for a maximum of 3.6v.
I had an XP 1800+ running as fast as 1772 MHz (11.5 x 154 MHz) on my voltage modded Shuttle AK31. The core was at 2.0V. Since I was air cooling, additional voltage didn't really help. I had the core at 2.05V to get my previous CPU, an Athlon 1.4, running at 1650 MHz (11 X 150 MHz).
Twas the CPU, I think. The XP 1800+ wasn't totally very stable at 1772, so I backed if off to 1754 and finally to 1725. That final drop was due to the heat coming on for the winter instead of the nice cool airconditiong being on.
The Athlon 1.4, on the other hand, was rock solid at 1618 MHz (10.5 X 154 MHz) so 154 MHz wasn't a problem for the Crucial PC2100 I was using. It ran there for a while before I tried the 11 X 150 MHz setting to get to 1650 MHz. And that wasn't really worth it because it benchmarked no better than the 10.5 X 154 MHz setting. I really haven't seen much success getting higher than 1750 or so on air cooling with XP 1800+ CPUs. I've seen guys go through the hassle of unlocking them, and they still get stuck around where I was. But maybe you'll have better luck.
Agree with you. Took a while to unlock mine and it will run at 1724 but will not do the 3dMark2001 bench unless I bring it down to about 1680 or less. Tried 11.5, 12 and 12.5 to change the FSB and she always halts about 1724 at 1.85V.
I kinda thought that the voltage mod would only add 50MHZ at best if it is the chip, but, who knows. I may get bored with it and give it a go!
I have an MCX462 so cooling is a lesser consideration.
Current Main Rig:
AMD FX55 @ 2.9 GHz
2 GB PC 3200 DDR RAM
ABIT KN8 SLi motherboard
ATI X1900XT O/C to XTX speeds
The voltage mod on the Shuttle AK31 was very easy with no soldering on the motherboard. The parts cost less than $5 and the procedure took less than 30 minutes, and I didn't even have to take the mobo out of the case, or the CPU out for that matter. And the XP 1800+ ran rock solid at 1725 MHz, so to me it was worth the effort.
I only sold the Shuttle combo to raise cash for an Asus A7M266-D duallie rig. And I'm sorry I did. I got the Asus running and did a voltage mod on it too (the same mod as the AK31), but it just got too expensive. The Asus mobo had nothing onboard, no LAN, no RAID, no SCSI, no USB, just crappy C-Media sound. It only had 5 PCI slots, two of which were those 64-bit, 66 MHz ones. The C-Media sound causes stability problems and the Asus was just a Beta quality board at a very high price. Anyway, I sold it and wish I'd just kept the Shuttle. Although I am enjoying playing with my P4 1.6A rig right now.
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