Message boards :
Number crunching :
32 or 64
Message board moderation
Author | Message |
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Miklos M. Send message Joined: 5 May 99 Posts: 955 Credit: 136,115,648 RAC: 73 |
Could I get any opinions whether it makes any difference in my new computer(being built as we speak), if it has 32 or 64 Gigabyte of memory? |
Ulrich Metzner Send message Joined: 3 Jul 02 Posts: 1256 Credit: 13,565,513 RAC: 13 |
For what purpose do you need *that* amount of memory? Should this be a web- or big database server? Then the more, the better? 16GB are more than enough, for "normal" purposes even 8GB are absolutely sufficient. So i would say, there is no difference in using 32 or 64GB. ;) Aloha, Uli |
juan BFP Send message Joined: 16 Mar 07 Posts: 9786 Credit: 572,710,851 RAC: 3,799 |
Unless you will going to work with extreamely big DB, making movies, CAD, etc. something that realy needs all the memory you could suply, 8 Gb most be enought. |
Miklos M. Send message Joined: 5 May 99 Posts: 955 Credit: 136,115,648 RAC: 73 |
Thank you for the rapid responses. I would doing normal things, no movie or storing large data bases. But, want to crunch Boinc Projects as fast as I can. |
Link Send message Joined: 18 Sep 03 Posts: 834 Credit: 1,807,369 RAC: 0 |
I would doing normal things, no movie or storing large data bases. But, want to crunch Boinc Projects as fast as I can. Than you should check the RAM requirements of the projects you run and buy as much as they + the system + the applications you run need, so that you don't need to have a pagefile turned on. For example a good rule of a thumb from Rosetta, which is quite RAM hungry, is 1GB per core + 2-4GB for everything else, depending if it's dedicated cruncher or not. |
Miklos M. Send message Joined: 5 May 99 Posts: 955 Credit: 136,115,648 RAC: 73 |
Thank you Link. |
Miklos M. Send message Joined: 5 May 99 Posts: 955 Credit: 136,115,648 RAC: 73 |
I think my new computer will be a (TM)i7-4960 with 3.6 GHz 6 processors and two GTX780ti cards. |
OzzFan Send message Joined: 9 Apr 02 Posts: 15691 Credit: 84,761,841 RAC: 28 |
Could I get any opinions whether it makes any difference in my new computer(being built as we speak), if it has 32 or 64 Gigabyte of memory? Are you actually asking about memory, or 32bit vs 64bit OS? |
Batter Up Send message Joined: 5 May 99 Posts: 1946 Credit: 24,860,347 RAC: 0 |
If you want to build a RAM drive the more RAM the better. If you want to run DDR3 1866Mhz don't go over 32 GB or it reverts to 1600Mhz. If you are going to overclock it is best to buy a "kit" so all sticks will play nice. |
ivan Send message Joined: 5 Mar 01 Posts: 783 Credit: 348,560,338 RAC: 223 |
Thank you for the rapid responses. I would doing normal things, no movie or storing large data bases. But, want to crunch Boinc Projects as fast as I can. As Juan intimates, even 32 GB would be massive overkill. Here's a snapshot of my home PC, running 7xCPU WUs and 4x GPU (AP only) WUs (2 each on two GPUs): top - 00:05:44 up 12 days, 3:17, 9 users, load average: 10.34, 10.12, 10.15 Tasks: 248 total, 12 running, 236 sleeping, 0 stopped, 0 zombie %Cpu(s): 0.8 us, 3.5 sy, 92.6 ni, 3.1 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st KiB Mem: 8130840 total, 7299792 used, 831048 free, 312808 buffers KiB Swap: 5119996 total, 1924 used, 5118072 free, 4697832 cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 21862 ivan 39 19 49748 47m 2040 R 99.8 0.6 167:09.44 astropulse_6.03 28792 ivan 39 19 106m 38m 12 R 99.8 0.5 2:38.56 setiathome_7.01 6079 ivan 39 19 49608 46m 1956 R 99.1 0.6 547:22.29 astropulse_6.01 24667 ivan 39 19 105m 38m 12 R 98.1 0.5 96:58.04 setiathome_7.01 24906 ivan 39 19 106m 39m 12 R 95.2 0.5 91:01.28 setiathome_7.01 22354 ivan 39 19 107m 39m 12 R 91.8 0.5 153:44.96 setiathome_7.01 27017 ivan 39 19 105m 38m 12 R 91.5 0.5 41:30.63 setiathome_7.01 26966 ivan 30 10 28.2g 47m 23m R 47.2 0.6 16:04.58 astropulse_6.07 24380 ivan 30 10 28.3g 90m 64m R 20.0 1.1 11:11.29 astropulse_6.07 25582 ivan 30 10 28.2g 47m 23m R 14.6 0.6 16:59.37 astropulse_6.07 22790 ivan 30 10 28.3g 90m 64m R 8.7 1.1 13:58.59 astropulse_6.07 top says I'm using 7.3 GB, but that includes various caches; the monitoring tool gkrellm says I'm actually only using about 2 GB. You can also discount the virtual memory (VIRT) column for the GPU tasks; there may be that much reserved but it's not actually used or even allocated. In summary, I'd find it hard to believe that a normal home PC running s@h would ever need more than 16 GB of RAM, and as in my case 8 GB is more than likely to be enough. Any RAM over and above what's needed to keep the tasks in memory is effectively wasted. |
Wiggo Send message Joined: 24 Jan 00 Posts: 34744 Credit: 261,360,520 RAC: 489 |
16GB is all I need on my main rigs (8GB wasn't quite enough for heavy work). Cheers. |
betreger Send message Joined: 29 Jun 99 Posts: 11361 Credit: 29,581,041 RAC: 66 |
16GB is all I need on my main rigs (8GB wasn't quite enough for heavy work). Don't you do a lot of video editing? IMO that's not normal home computing. |
TBar Send message Joined: 22 May 99 Posts: 5204 Credit: 840,779,836 RAC: 2,768 |
Here's my Ubuntu System. It has a grand total of 2GB of RAM. It's running 3 CPU APs & 2 GPU MB7s. Top says it's using most of the RAM, However, it's hard to believe all those %MEM adds up to 2GB. In Fact, most of the RAM us being used for File Caches, it's a *nix thing. According to the System Monitor, it's really only using about 660MB, or around 33% of Physical RAM. The Swap Used was 0 until I fired up Firefox. My Windows 8.1 system is similar, it rarely goes above 50% of it's 2GB of RAM. top - 21:09:03 up 11 days, 14:12, 2 users, load average: 3.42, 3.45, 3.37 Tasks: 183 total, 4 running, 179 sleeping, 0 stopped, 0 zombie Cpu(s): 78.1%us, 1.5%sy, 0.0%ni, 18.4%id, 0.0%wa, 0.0%hi, 2.0%si, 0.0%st Mem: 2021232k total, 1911912k used, 109320k free, 167256k buffers Swap: 3153912k total, 3336k used, 3150576k free, 1081248k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 21192 tbar 20 0 21436 19m 2056 R 100 1.0 88:42.22 ap_6.01r546_sse 21224 tbar 20 0 21512 19m 2060 R 99 1.0 51:57.32 ap_6.01r546_sse 21077 tbar 20 0 21512 19m 2056 R 94 1.0 208:46.75 ap_6.01r546_sse 21351 tbar 20 0 167m 71m 19m S 12 3.6 0:29.47 setiathome_x41g 21287 tbar 20 0 222m 85m 19m S 11 4.3 1:58.96 setiathome_x41g 1148 root 20 0 161m 57m 25m S 6 2.9 752:31.05 Xorg 20707 tbar 20 0 323m 31m 17m S 4 1.6 20:45.78 boincmgr 1330 tbar 20 0 305m 64m 25m S 1 3.3 82:08.22 compiz 20715 tbar 20 0 112m 13m 6108 S 1 0.7 1:25.81 boinc 21326 tbar 20 0 208m 15m 10m S 1 0.8 0:01.45 gnome-terminal 21347 tbar 20 0 19240 1480 1060 R 0 0.1 0:00.51 top 1 root 20 0 23804 1848 1252 S 0 0.1 0:00.84 init 2 root 20 0 0 0 0 S 0 0.0 0:00.01 kthreadd 3 root RT 0 0 0 0 S 0 0.0 0:00.01 migration/0 4 root 20 0 0 0 0 S 0 0.0 0:20.93 ksoftirqd/0 5 root RT 0 0 0 0 S 0 0.0 0:00.03 watchdog/0 6 root RT 0 0 0 0 S 0 0.0 0:00.01 migration/1 |
Wiggo Send message Joined: 24 Jan 00 Posts: 34744 Credit: 261,360,520 RAC: 489 |
16GB is all I need on my main rigs (8GB wasn't quite enough for heavy work). True I do do a bit now and again, but as a fair bit of that work is shared over the video memory as well these days so I usually have 4-6GB to spare on the system memory depending on the quality being worked on. In just normal everyday stuff I would rarely use 4GB of that, but in either case 32GB or 64GB IMO would just be a waste of money if your not going to use it. Cheers. |
betreger Send message Joined: 29 Jun 99 Posts: 11361 Credit: 29,581,041 RAC: 66 |
From what little I know I agree. |
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