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PostPosted: Tue Jul 29, 2014 1:53 pm 
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Pilgrim
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Hello, first post so please be gentle.

I want to build a new PC. I want to buy a motherboard, CPU and RAM on eBay. I already have pretty much everything else.

I'm having trouble telling which chips are compatible with which motherboards. Is there a good database of the specs for various models? Basically, I need to know for a given motherboard a list of supported CPUs, maximum RAM, and RAM type.

I've been Googling the various names, but often can't find any information at all.


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PostPosted: Tue Jul 29, 2014 10:18 pm 
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Mobo-fu Master
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If you can give us some sort of idea what kind of budget you have and what kind of motherboard you want to use, we can do some of the legwork for you. I am surprised though that Googling the motherboard model does not give you the results you are looking for :o can you give us some examples?

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PostPosted: Tue Jul 29, 2014 11:57 pm 
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okay, this is my first attempt at building. The plan is to get cheap stuff. That way if I make a mistake and fry the motherboard, it won't matter so much. Better do it with a £20 board than a £100 one.

I don't think it would work if you recommend a specific motherboard. It might not be available right now on eBay. Better that I look at what's available, and pick a suitable one from that.

As an example of my problem, here's a nice looking motherboard. But what's it's maximum memory? What processors are compatible?

Googling only produces a few hits, and they are all adverts on eBay or similar.


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PostPosted: Wed Jul 30, 2014 8:26 am 
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http://manuals.ts.fujitsu.com/file/3359 ... thb-en.pdf

it's a LGA775 board - so can only take those processors.

details on the RAM/memory from the manual - you can have up 4gb of 184 pin DDR2, but it must be ECC-type:
    Technology: DDR2 400 / DDR2 533 unbuffered DIMM modules
    184-Pin; 1.8 V; 64 Bit, with ECC
    Size: 256 Mbytes to 4 Gbytes DDR2
    Granularity: 256, 512 or 1024 Mbyte for one socket
    A current list of the memory modules recommended for this system board is available on the Internet
    at: http://www.fujitsu-siemens.com.
    At least one memory module must be installed. Memory modules with different memory capacities
    can be combined.
    ! You may only use unbuffered 1,8 V memory modules with ECC.
    DDR2 memory modules must meet the PC3200 or PC4300 specification.

-Roach

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PostPosted: Wed Jul 30, 2014 12:03 pm 
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Roach412 wrote:
http://manuals.ts.fujitsu.com/file/3359/d1859-thb-en.pdf
That's just giving me a blank page.

Quote:
it's a LGA775 board - so can only take those processors.
Will all LGA775 processors be compatible?

Quote:
A current list of the memory modules recommended for this system board is available on the Internet
at: http://www.fujitsu-siemens.com.
server not found.


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PostPosted: Wed Jul 30, 2014 1:23 pm 
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Weird, that pdf link works perfect here. it is from the Primergy Econel 50 SERVER btw.

Here's another PDF file that at least specifies what CPUs were originally installed in the various models:
http://www.mands.hu/mkgi/termekinfo/200 ... onel50.pdf

Here is the support page for that beast, straight from FSC itself. Enjoy.
http://support.ts.fujitsu.com/Download/ ... =0&NavIDs=

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PostPosted: Wed Jul 30, 2014 3:05 pm 
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Pilgrim
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evasive wrote:
Weird, that pdf link works perfect here.


It's some problem with my Firefox settings. I was able to download it.

It says its 800 MHz front side bus. Most of the chips on eBay are 1066 or 1333. What would happen if I used one of those?

a) It wouldn't work
b) It would work sub optimally
c) No problem
d) a big kaboom
e) something else.


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PostPosted: Wed Jul 30, 2014 4:49 pm 
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With any motherboard type.. it may not accept all CPU versions unless a specific BIOS version is installed.
Many motherboards may have a socket that could accept the wrong CPU physically, and could damage the board if not compatible.
Best to check the manufacturer's Web site, look for the QVL (Qualified Vendor List) for allowable CPU types.
Memory has to be rated for the maximum speed of the system's FSB. Normally, the base clock will be at 133 MHz, 166 MHz or 200 MHz. It is then doubled for the memory base speed, and quadrupled for the CPU base speed.. then the multiplier is activated. Older designs for memory had the doubling of base speed, with one clock "tick" per cycle. The latest designs can use three or four clock "ticks" per cycle.. hence the DDR, DDR2 and DDR3 classes. They are not cross-slot compatible. Each type requires a key in the slot to match.
Faster memory will normally work very well at slower speeds. Slower memory will stumble and fail at higher than rated speeds.
Match the memory speed to the CPU speed.

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PostPosted: Wed Aug 13, 2014 5:16 am 
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most of the time a) because especially with OEM boards, they limit the bios in what it wants to run. If at all possible stick with a 800FSB CPU.

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