An 805 can be a pretty decent processor, I've got a rig running one now, shown here: CPU-Z Database. For the price, I'd definitely recommend it; however, I wasn't able to realize the full potential on an $80 ECS motherboard... so you have to think about the cost of other components also. I'm not even sure I'm reaching as far as this chip can go, as I'm still at a pretty low voltage (1.325V in the BIOS, I was too impatient to wait for the stuff from Jameco so I stuck a pencil tip in there, and it's sitting at about 1.46-1.5V, funny thing is, it acts like afterburners, voltage goes up about .02-.03V when I load it up). I think I'm going to try for a little bit more when I get the actual parts to solder my board up with a 'proper' vdroop mod. Prime stable on the max heat/power consumption torture test for over a day now, although she does get a bit hot under the collar, 57C on water after a few hours, stuff I had laying around... maybe the cause of that is not enough flow (a DD CSP-Mag with 1/2" tubing, a Swiftech Apogee WB, and a BIX2 X-flow, with a ghetto jug of 95% distilled water and 5% valvoline racing super coolant). What voltage range is too much for this chip? I've seen other 805s on 1.6V and more, but I'm not sure about that. What do you guys think? Should I maybe stick a different pump on there to give the Apogee a bit more flow (it may be starved)? Thanks everyone.
Well, put it this way. If your computer won't turn on anymore, you've put too much in. People will say "oh, putting too much voltage in will shorten your chips life!!!!!!!!!!!!!!!!!!!!!!!11111111111111111oneoneleven" acting very critical and such, but truthfully, are you really going to be running on a Pentium D 805 for the next 15 years? Just to be safe, stay in the below 1.6Vcore range. I've been pushing 1.615 through mine on air and its stayed below 60C priming both cores, but thats pushing it a little. If your on water (which you are... doh...) I would just stay in whatever range you think is safe. Once the tempertures start running over 60C I would recommend backing down. -A fellow 805 user.
I've got my 805 on water with 2 120mm radiators, temps are mint at about 40 loaded but I can't get the damn thing stable at any sort of overclock. Even at 3.33ghz (20x166) it gets all sorts of wierd problems and my in game FPS drops to ~20 (this is CS 1.6 here :O ) I've had it at 1.6 Vcore and booting to windows at 3.66 but it just crashes with any load. Motherboard keeps removing the overclock as well.
This sounds interesting -- I'm getting 4.0GHz at what the P5WD2-E calls 1.375V (actually 1.25-1.42V), with temps maxing out at 61C. Do you have a link to this vdroop fix? Edit: Found this, looks a bit what did you do with the pencil? Thanks ch424
I was a little bit leery about it, so I stuck the pencil tip in very carefully and turned it on and checked it out, all while holding that stupid thing in there (it was hard, lol). It worked, so I turned it off, twisted the pencil around a bit, and bent it over to snap off/lodge the tip in there. Works like a charm, and if I ever need to remove it I should be able to pick it out with a small enough pick... maybe... doh...
Nope. Gigabyte GA-8I945P-G Turned out that the memory controller sucks, if I put the memory divider really low then I can do 3.8ghz pretty stable which i'm happy enough with.
