Hardware & Devices

Re: SRAM speed - what to expect if memory banks speeds do not match?

23-Jan-08 8:36

I'm not that familiar with static memory. Your best bet is to run a memory test to determine if the failure is located in the memory module. If you do register an error, swap the modules into different slots and test again. If you return another error, there is a good chance you do have bad stick of memory. If you do not return an error on the second attempt, it is probably a bad socket, not the memory module; in which case you would need to replace the motherboard.

Another thing you want to avoid is "mix-n-match memory". Make sure that the memory installed in the system is nearly exactally the same. You said they are PC133, so make sure both are ECC or neither are ECC, make sure the brands match too - as some brands do not mix well with others. You will also want to check with your BIOS to make sure the voltage output to the modules are correct.

Lastly, if I am not mistaken, SRAM is an old(er) technology. That being the case, you may want to think about upgrading the system entirely.

-David

PS- This is completely unrelated, but try out Opera instead of IE, you might like it...

Vaclav_23-Jan-08 11:11

Vaclav_

23-Jan-08 11:11

I have been thru the swapping into different banks.
So far it runs better with just single module in bank 0.
Of course I do not notice any difference in speed.
I have not tried bank 1 to find out if it is a socket itself.
It would be very unlikely since I have similar failures in two PS's.
I do not believe in upgrading just because it is "older" technology.
When it runs it is OK for my C++ development.
Actually I prefer slower machine - it lets me take a break during compile!
Thanks for your input,
Cheers
Vaclav

PS Technically it is really SDRAM.
What puzzles me that the BIOS memory test always passes.

Re: SRAM speed - what to expect if memory banks speeds do not match?

Dan Neely24-Jan-08 2:21

Dan Neely

24-Jan-08 2:21

ruready511 wrote:
Lastly, if I am not mistaken, SRAM is an old(er) technology. That being the case, you may want to think about upgrading the system entirely.

Sram is the design used in CPU caches. It's much faster than dram but is more expensive to make and needs more space on the silicon. IIRC Sram uses several transistors to store a value, Dram charges a capacitor to do the same.

Otherwise [Microsoft is] toast in the long term no matter how much money they've got. They would be already if the Linux community didn't have it's head so firmly up it's own command line buffer that it looks like taking 15 years to find the desktop.
-- Matthew Faithfull

Network Adapters

Ajay L D20-Jan-08 23:49

Ajay L D

20-Jan-08 23:49

Hi,
I want to display the Ethernet MAC address and Wireless MAC address on my application.
I am able to enumerate the network adapters on my PC. But, how can I tell which MAC address belongs to which network adapter?

Thank you,
AJ

Re: Network Adapters

Sebastian Schneider21-Jan-08 2:08

Sebastian Schneider

21-Jan-08 2:08

It belongs to the adapter you are currently enumerating....

Seriously, the name for the enumerated adapters should be available somewhere. WMI, perhaps?

Haven't done this before, so I really cannot say much more.

Cheers,
Sebastian

--
"If it was two men, the non-driver would have challenged the driver to simply crash through the gates. The macho image thing, you know." - Marc Clifton

Linksys router and linksys access points

scorp_scorp15-Jan-08 21:38

Re: Linksys router and linksys access points

15-Jan-08 21:38

Dear all,
I am using ADSL connection. Am using Linksys wireless router WAG325N (i have set a password for this connection), now i need to supply connection to an upper floor, away from the wireless signal length. I want to add wireless linksys access point connected to the router, i will use WAP54G.
My concern is that i have been told that the connection throught that access point will not be password protected, in other words, that any PC within the range of the access point can get connect without the need of the password.

Is it true?
Please Advise

Best regards.

ruready51117-Jan-08 4:46

Re: Linksys router and linksys access points

17-Jan-08 4:46

Ok, there are a few minor issues with the setup you described. Nothing is "wrong" with it, if that is what you want; but I don't think this is the case.

The router you chose, the WAG325N, is really good. It supports 802.11b,g, and n. Now, I am assuming you want to put the wireless access point upstairs because you don't have any cable run up there. This makes sense, but I don't think you want an access point; you want a signal repeater. The access point you chose, the WAP54G, is just another router. You can daisy chain the two, but that can be troublesome to setup; and, the access point, or router (WAP54G), will have to be physcially connected to the main router (WAG325N). This defeats the purpose all-together. On top of that, if it does work out, all devices accessing the secondary network (upstairs) will only operate at 802.11b, and g speeds, and not 802.11n at all.

I think a better solution to your problem is to use a signal repeater for the upstairs level. A signal repeater will recieve a signal from your router and then re-broadcast it at a much higher decibel (dB) level. But keep in mind that most signal repeaters can only repeat ONE signal frequency. So if you get a repeater that will repeat an 802.11g signal, than the 802.11g signal will be the strongest on the upper level and therefore will only provide 802.11g speeds to those devices connected to the network on that frequency.

scorp_scorp18-Jan-08 4:40

Re: Linksys router and linksys access points

18-Jan-08 4:40

thanks for help, but
I cant get a repeater and I only have the WAP54G, i wanted it to be connected phisically by a cat6 cable to the WAG325N, and to be pasword protected for any one wants to cnonect to it. could it be done this way? or it will be unprotected ?

ruready51118-Jan-08 5:20

18-Jan-08 5:20

Yes, that will work. It looks like the WAP54G supports WiFi Protected Access (WPA), so it will offer protection. But as mentioned earlier, linking the two routers and having them both provide connectivity on the same network will be difficult.

Post your results, I'd like to hear about it.

Tele. cable installation

scorp_scorp15-Jan-08 8:29

15-Jan-08 8:29

Hi all,
I need to install telephones 200 meters apart from the PABX. My question is, can i use ordinary multi pair telephone cable (cat 1) or do i need to use cat5e or cat6 cable.

thanks in advance for help

ruready51115-Jan-08 11:05

15-Jan-08 11:05

Both cables have a max segment length of 100 meters. So once you get a signal booster or two on each run, you then only have to decide what type of phone system you will be utilizing. POTS (CAT-1)with signal boosters will provide voice only for each extention. Or you could go with VoIP (among others) with signal boosters; you will need to run at least CAT-5, but if your budget will allow, try to go with CAT-5e so you have the ability to operate on a stable 1000Base-T network.

scorp_scorp15-Jan-08 21:19

15-Jan-08 21:19

Thanks alot.

Dan Neely16-Jan-08 2:24

Dan Neely

16-Jan-08 2:24

Cat5e is only for 100base-t networking. For 1000 you need cat6.

ruready51116-Jan-08 6:03

16-Jan-08 6:03

Not necessarily. If you look up the standard, CAT-5 was initially supposed to support 100Base-T and 1000Base-T, but it was an unofficial specification and fairly unstable on 1000Base-T networks. The CAT-5e specification was created to support a 1000Base-T network by simply making minor adjustments to the CAT-5 specification. CAT-6 does the same thing as CAT-5e, but has much more room to grow; like having power over ethernet, etc.

Vaclav_21-Jan-08 8:16

Vaclav_

21-Jan-08 8:16

Are these POTS - (48V plain telephone extensions) or proprietary or IP phones?

scorp_scorp2-Feb-08 3:44