Rambus - RIMMS

  • Thread starter Thread starter Rodger
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Rodger

Hi.I have a Gigabyte GA-8TX Intel 850 motherboard,. it came with 2 x 64
rimms, and I would like to put in 2 x 256

Looking in the manual it says "Support 300 & 400 Mhz Direct Rambus @ 100mhz
host bus frequency

Optional ECC configurable.

Never having researched it, I took that to mean the board could take 300 or
400 mhz rimms, however I now see on eBay 800 seems to be the typical speed,
with no mention of any 400 rimms.

Am I missing something?

Looking at the actual 2 x 64MB in the board,,,

"Korea 0111 64/4 MB

MR 16R 082 4BN 1-

CK81N

800-45 101


So I see a ref to 800

Thanks for any help
 
Rodger said:
Hi.I have a Gigabyte GA-8TX Intel 850 motherboard,. it came with 2 x 64
rimms, and I would like to put in 2 x 256

Looking in the manual it says "Support 300 & 400 Mhz Direct Rambus @
100mhz
host bus frequency

Optional ECC configurable.

Never having researched it, I took that to mean the board could take 300
or
400 mhz rimms, however I now see on eBay 800 seems to be the typical
speed,
with no mention of any 400 rimms.

Am I missing something?

Looking at the actual 2 x 64MB in the board,,,

"Korea 0111 64/4 MB

MR 16R 082 4BN 1-

CK81N

800-45 101


So I see a ref to 800

Thanks for any help
Click to expand...

PC 800 RIMMs run at 400 MHz - they're called 800 because they exchange data
on both the rising and falling part of the memory bus cycle. PC 800 RIMMs
are the most common sort out there (some PC 1066 as well). Rambus is also
known as RDRAM. There are lots of reputable compnies selling this on eBay
but be aware its now VERY expensive - you'll loose your right arm for a pair
of 256 PC800 RIMMs off eBay - better than both an arm and a leg elsewhere
though. You should have no trouble selling your old RIMMs there either. You
currently have non-ECC 45 Nanosecond PC 800 RIMMs, try to find some 40
nanosecond PC800 replacements as they'll be slightly faster - note that PC
1066 will not make your machine run faster if the board only goes up to
PC800 spec..If you want increased memory "integrity" go for ECC as well
(that will mean an 18 in the part no instead of a 16). ECC memory should
pick up any "mistakes" by the memory and correct it before moving on - this
will slow down things slightly though. I'm using non-ECC 40 nanosecond PC800
memory in my machine and haven't had a memory problem yet - ECC is really
only benificial if the machine is used for important data eg a file server,
for the average home user its "nice but not necessary". One other thing -
ensure you get matching pairs of RIMMs for that board - some machines (eg
mine) will accept just one RIMM with a C-RIMM (a form of "blanking" circuit
board without chips on it) in the other slot, yours wont.

Paul
 
PC 800 RIMMs run at 400 MHz - they're called 800 because they exchange
data
on both the rising and falling part of the memory bus cycle. PC 800 RIMMs
are the most common sort out there (some PC 1066 as well). Rambus is also
Click to expand...

...etc...

Paul thanks for a full explanation, all clear now. Its one of those areas
that doesn't seem covered that well on the usual web sites.

I see on eBay that 2 x 256 goes for 80-90 UKPounds, I suppose its not bad
really.

Thanks again, and thanks to Jim Macklin and "Hillbilly Buddhist" (!) for
your replies too.
 
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