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Speed comparision XEON (HELP)
HI I need some help.
I have a Dell with a Xeon process 1.8GHZ from 5 years ago, I am considering upgrading but I am trying to quantify the difference in speed for new processors vs my old. I am considering the follwing: 1) new Xeon processor 2.8GHZ (single) 2) new Xeon Processors 2.8GHz plus another Xeon Processor 2.8GHZ 3) new Duo-core Xeon Processor 2.8GHZ I would be running Windows XP professional. Will I see a sizable jump in speed if I upgrade to the single processor? Or Should I get the two processors? or Duo-Core Processor? If I get the two processors or the Duo-Core processors, do I need a special 64-bit Windows system? Will my basic software like excel, outlook, MS Access, be able to use the 2 processors, or is there special software versions needed to run with multiple processors? Please help me understand the differences, and please let me know how much faster (by %) then my orginal. For Example: Xeon 1.8GHZ vs ABC processor is X% faster thank you |
#3
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Speed comparision XEON (HELP)
No, I will be purchasing a whole new machine, if I can get a noticable
increase in performance. I don't really know, but isn't a 1.8GHZ and a 2.8ghz about the same speed? +-10% Also, which is better one duo-core Xeon, or two Xeon processors? Will they have the same performance? Are there any considerations I need to learn? thanks |
#4
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Speed comparision XEON (HELP)
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#5
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Speed comparision XEON (HELP)
I would be purchasing a whole new machine, so besides the processor and
the hard drive speed, what else can boost performance? |
#6
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Speed comparision XEON (HELP)
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#7
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Speed comparision XEON (HELP)
does the following seem correct?
_______________________________ Dual CPUs and/or dual-core CPUs offere certain advantages. First, they can split the workload so one program can use one CPU and another program can use the other. Within a single app if it DOESN'T support multi-threading it will simply go to the CPU the OS suggests. If the application is Multi-threaded, it will break up its own tasks and send each to the CPU most able to process it at that time. The biggest weakness of dual-core, is that while it has two physical processors, they share the same memory controller on a single Host Bus. Internally the CPU takes the single thread each physical processor will attempt to process parts of it. CPUs work something like a time-sharing plan on a process. It looks at it for a bit, then looks at something else, then switches again, until it eventually gets back to this process. Both of the CPUs in a dual-core will attempt to time-share the same process and each time it switches, it has to clear the current cache and reload the cache for the other CPU and back and forth. Admittedly this occurs very very quickly, but in the scheme of things, for a CPU this wastes a lot of time switches in and out of cache memory. For multi-threaded applications, this process is reduced or eliminated. A large portion of the performance gain is due to this. If the system is being used heavily to do multiple tasks, this would be the order I would expect the system to perform relative to each other (1 being fastest, 3 being slowest) 1) Dual CPUs 2) Dual-Core 3) Single CPU If the system is being used for one thing at a time mostly, the order changes: 1) Dual CPUs 2) Single CPUs 3) Dual-Core It really depends on how you use your system and which applications you use. If you are running SQL, along with other programs, you would likely see a benefit with Dual-Core, but Dual CPUs would still be better. Here are some links that should be helpful: Dual Core Processing: Over-simplified, demystified and explained. http://www.short-media.com/review.php?r=261 Desktop CPU with two built-in processors does well at juggling multiple tasks. http://www.pcworld.com/news/article/0,aid,120656,00.asp About Intel Multi-Core http://www.intel.com/multi-core/index.htm http://www.intel.com/multi-core/docs.htm |
#8
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Speed comparision XEON (HELP)
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#9
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Speed comparision XEON (HELP)
wrote:
No, I will be purchasing a whole new machine, if I can get a noticable increase in performance. I don't really know, but isn't a 1.8GHZ and a 2.8ghz about the same speed? +-10% Also, which is better one duo-core Xeon, or two Xeon processors? Will they have the same performance? Are there any considerations I need to learn? Without a doubt the dual core will be more cost effective, but I can't swear that having an extra path to memory will never help performance. On the other hand having the cores communicate without going off chip may boost performance, so why spend any extra money on another socket? I have never seen any performance difference looking at users per server or similar, but I haven't don't have detailed benchmarks. As for 1.8 vs. 2.8, if your load is so small you don't see the difference then you probably don't need two CPUs anyway. You really will see about 50% increase in throughput on a CPU-bound load. As I've said elsewhere, hyperthreading may give you additional benefits, although it isn't a substitute for a second CPU core. -- bill davidsen SBC/Prodigy Yorktown Heights NY data center http://newsgroups.news.prodigy.com |
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