mindless1
Diamond Member
- Aug 11, 2001
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Originally posted by: trevor0323
Alas I just solved many of my OC'ing problems with this board, like many other posters who could not obtain a stable OC even with modest settings. After numerous failures I put my money on my PSU being the problem.
In the machine I have
Abit IP35-E, E2180, Adata DDR2 800 2x1gb, Thermaltake TR2 430w PSU
This is the PSU that has the most reviews on newegg and is a decent piece of a equipment for a modest system. The problem is that it is a single 12v rail and from some reading this board likes dual 12v rails better. The other more important problem is that it only has the 4 pin 12v plug for CPU power. As you know the IP35-E has the 8 pin for the CPU on the mobo although the manual states you can use the 4 pin however recommends the 8 pin. I plugged in my spare Neo power 500w PSU that I have been saving for my own rig as this PC is for my buddies. and sure enough I was able to OC to 3.0 Ghz with the 1:1:25 ram divider with memory timings of 4-4-4-12.
Since I didn't want to sell or give this PSU to my buddy I rolled the dice with the dynex case/psu combo at best buy posted in the hot deals. Luckily the PSU that came with had the 8 pin connector. The PSU claims to be 500w but is probably more like 350w, however this still will be more than enough for my buddies modest system. Anyways I am off to buddies to test this PSU and see if it will allow the same OC as the Neopower 500.
Cliffs for those having trouble OC'ing: MAKE SURE you use the 8 pin 12v cpu power connector on the mobo, and if your PSU does not have one replace it.
Just as a side note, I was wondering if they sell a 4 to 8 pin adapter for the 12v cpu power plug anywhere. This could have aslo solved my problems
Glad it's working for you, but I've no trouble at all o'c past 3.2GHz using a PSU with only 4 pin 12V connector.
When I did so, using voltmodded o'c 7600GT video card, total system power consumption was about 180W at the wall outlet, or roughly 180*0.75(% PSU efficiency) = 130W total system power consumption including a couple PCI cards, couple hard drives. That's an absolute max of under 11A on 12V rail, probably quite a bit lower as the other parts certainly used some 5V current as part of that total. That's almost peak load too, running Orthos and 3DMark it would go as high as 200W but that's only 20W more.
HOwever, you might easily have a more power hungry video card or more parts in your system, which carry their own power needs. Otherwise a dual rail PSU is not needed for this board. If you had some very power hungry part with very large current swings then maybe that part ought to be isolated on a separate power rail, but it's not a certainty either.
I'm thinking more than anything your PSU was simply overrated or wearing out, that the other differences between the old and new weren't relevant. You might keep it unplugged from AC for a few hours then pop the top off and see if any capacitors are failing.
