RE: Help! Mathematica on my 500MHz outperforms my GHz machine!
- To: mathgroup at smc.vnet.net
- Subject: [mg21704] RE: [mg21616] Help! Mathematica on my 500MHz outperforms my GHz machine!
- From: RK4 <gravitonflux at netzero.net>
- Date: Sat, 22 Jan 2000 02:53:16 -0500 (EST)
- Organization: RK4
- Sender: owner-wri-mathgroup at wolfram.com
It is most verifiable that your new front side bus is "bottlenecked" and could never do more computations until you overclock, if your new frontside bus will allow this as stable. The bus is limited theoretically and new technology is only being designed and is not yet for sale. Next is your new machines memory even faster than the old 133MHz SDRam and is the new hard drive even swapping faster? What are the Winstone 99 test results for this new machine? Graphics may be accelerated but not integer and floating point ops. Have you run the ZDnet hardware advisor test or Wintune 98? You need to verify the vendor really sold the optimal hardware and they usually wont know the secrets unless the built it and can perform true overclocking tests. -----Original Message----- From: terryis at my-deja.com [SMTP:terryis at my-deja.com] To: mathgroup at smc.vnet.net Sent: Monday, January 17, 2000 11:35 PM To: mathgroup at smc.vnet.net Subject: [mg21616] Help! Mathematica on my 500MHz outperforms my GHz machine! Help! I just took delivery of a 1GHz machine which I bought expressly for the purpose of running Mathematica. After installation and setup I ran a couple of simulations only to discover that it's performing at about the same level as my 500MHz Pentium III!! Can anyone explain to me why this is the case? Additional configuration information: Pentium III vs. AMD Athlon (K7 overclocked) 500MHz vs. 1000MHz 128MB RAM vs. 128MB RAM 100MHz Front Side Bus vs. 200MHz system interface bus based on the Alpha EV6 bus protocol Windows98 vs. Windows NT 4 Both running the same version of Mathematica (18.104.22.168), the same simulation (90% of which is simple floating point calculations), both dedicated only to running Mathematica at the time of testing. Disk speed is irrelevant as the simulation completes without writing to disk. Swap space doesn't seem to be the issue. I don't have the exact clock speed of the AMD processor but I would imagine it's at least 600MHz which in my mind means that it should be faster even without over-clocking to 1GHz but it isn't! Simple tests of floating point speed (with for example a QBASIC program) and other processes perform as expected so it would appear that Mathematica is doing something different on the AMD machine then on the Pentium, but what? I've already gone to Wolfram Tech Support. They suggested I post here. Any and all help will be appreciated. Please reply to tchung at us.oracle.com as I do not regularly read this newsgroup. Thanks in advance! Sent via Deja.com http://www.deja.com/ Before you buy. __________________________________________ NetZero - Defenders of the Free World Get your FREE Internet Access and Email at http://www.netzero.net/download/index.html