Author: Aaron Gordon
Date: 11:29:12 12/21/02
Go up one level in this thread
On December 21, 2002 at 09:59:11, Bob Durrett wrote: >On December 20, 2002 at 23:20:01, Aaron Gordon wrote: > >>On December 20, 2002 at 19:33:32, Bob Durrett wrote: >> >>>On December 20, 2002 at 18:45:12, Aaron Gordon wrote: >>> >>>>AthlonXP 2800+ (2.25GHz) is the latest. The 2.52GHz XP in the Crafty benchmark >>>>list was an overclocked 2600+ (2.13ghz). >>> >>>Oh! That's just wonderful!!!! That means that the Crafty v18.11 Benchmark data >>>is inflated! You just can't believe anything nowadays. The hash table sizes >>>were probably unrealistically small too, to further inflate the data. >>> >>>I am beginning to think I should throw that graph in the trashcan. >>> >>>: ( >>> >>>Bob D. >>> >>> >>>>You can get the Asus A7N8X Nforce2 >>>>board with 2800+ CPU at www.newegg.com. It's going to be very expensive though.. >>>>Not nearly as expensive as a P4-3.06ghz however ($660 just for the cpu) :) >> >>Inflated? It's called overclocking. Also, if you bothered to do the math you'd >>see the AMD cpus are faster by far. With or without overclocking. Crafty gets an >>almost linear speedup. All you have to do is the math. Overclocking doesn't >>"inflate" anything. It's not going to be magically faster MHz for MHz. >> >>If you had a true 3.25GHz P4 and an overclocked P4-3.25GHz they'll be the same >>speed. If you can't overclock then thats your decision/problem. I leave it up to >>you to figure out which is going to be faster at the speed you choose. I'm not >>going to do any "hand-holding" as far as the results go. You went to school, you >>figure it out. > >Well, I guess I have two weaknesses: (1) I do not like excessive amounts of fan >noise, and (2) I hate having my computer being on the verge of burning up all >the time. > >Reliability is important to me. Convenience too. Maybe I'm spoiled? > >I bought a Compaq because, according to their advertisements, they do extensive >testing on their computers before they put them on the market. Unfortunately, >there is a price to pay for that. Compaq is not quick to sell the absolute >latest processor the minute it becomes available from Intel or AMD. [They do >not overclock their processors, either.] The Compaq testing takes a lot of >time. I understand that. As a retired electrical engineer, I spent MANY hours >in a laboratory doing developmental testing of electronic hardware. It is not >uncommon for equipment to fail in thermal or reliability tests. Without the >tests, you are just asking for trouble. > >Overclocking sounds to me like an invitation to disaster. > >But there is another consideration, which may be the most important of all. >That is "knowing what you are going to get before you pay out the money." > >I had hoped to find out what to expect here at CCC. That's why I ask about Kn/s >and Fritzmark for my favorite software, Fritz. > >Maybe people have not had time yet to evaluate the new Fritz engine, so answers >may be awhile in coming. > >Bob D. > > >Bob D. I can completely understand that. When doing any overclocking (or even if you just get new hardware and not overclocking). I can understand about wondering how the 2800+ will be. If you go to http://speedycpu.dyndns.org/crafty/bench.html and look at the nodes/sec you can do nodes per second * new speed / old speed. So to get a good idea of what a 2800+ will do (give or take 2%) Just do 1578197 * 2250 / 2520. This gives you 1409104 nodes/sec. The P4-3.25GHz got 1335397 nodes/sec, so a 2800+ is still a decent bit faster than an overclocked P4. From the looks of it it'd take a P4 running just a bit over 3.4GHz to equal the 2800+. About overclocking. It's only dangerous if you don't do a few necessary things. You'll want a decent powersupply for newer systems, 400watts or more. Always get the best heatsink/fan available (SLK-800 at the moment). You can get away with using a quieter fan though, I know of an 80mm thats very quiet and still puts out 50cfm of air. This would be ideal for people that still want to have their hearing. :) A quality motherboard goes hand in hand with a good overclocking chip. You won't get a good/stable overclock without one or the other. High quality doesn't mean expensive, though. The best overclockers board now is only $70 or so. Also from my experiences you can push the processor up to anything you want without it dying (as far as clock speed goes). Just two rules to follow there. Don't go over the maximum safe voltage and don't let the cpu overheat. Now, I'm not saying a cpu like a XP 1800+ is going to run 3GHz but if you DO push it up that high it won't kill it. Just don't exceed 2.5v on Thunderbird cores, 2.2v on Palomino cores and 2.0v on Thoroughbred cores. As far as the temperatures go just keep them under 50C. I know people running 55-60C but thats a bit much. If it ventures into the 50-52C range on hot days don't worry about it much though. Thats pretty much it. Best overclockers combo now days is a Tbred 1700+ for $57 and one of the KT333/400 Epox boards for $70. Can easily get a nice system that outperforms a 2600+/333 chip for less than the 2600+ costs. :) You could probably build a cluster of them for what a dang P4-3GHz chip costs. :)
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