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OT: RAM Speed [message #62041] Thu, 15 January 2004 10:32 Go to next message
npsmith82 is currently offline  npsmith82
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At the moment i have 512MB SD-RAM inside my PC, and i have two expansion slots designed to install DDR Ram. I've looked in my motherboard manual and the memory speed maximum is 266mhz.

Would there be any problems with buying memory that is faster than the 266mhz DDR RAM? (333/400 etc)?


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OT: RAM Speed [message #62043] Thu, 15 January 2004 10:39 Go to previous messageGo to next message
Founder of YASA
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I think that those ram will have to run at 266MHz speed instead at full.

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OT: RAM Speed [message #62045] Thu, 15 January 2004 11:09 Go to previous messageGo to next message
nastym4n is currently offline  nastym4n
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there is no problem buying the faster RAM for when you upgrade in the future.

As stated above however it will only run at either:

[1] the speed of the slowest DDR RAM you already have installed. Here it does not matter what your board will support, if your existing 512 runs at 133 any other DDR RAM you buy will also run at 133

[2] a Maximum of 266

Bear in mind that some boards do not support much RAM, so it is worth checking the max capacity. Also check that there is not a particular order you must go in:

eg.

I have 768 meg of DDR RAM, one 512 and one 256. If I put the 256 in socket one it will not work, as I must put the bigger piece of RAM in socket one.


OT: RAM Speed [message #62079] Thu, 15 January 2004 13:52 Go to previous messageGo to next message
General Havoc is currently offline  General Havoc
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You can run your memory at lower speeds with no problem. They may even be more stable at th lower speed then marked. I recently put a PC 2700 DIMM in a 266Mhz motherboard as the PC2700 DIMMS were cheaper than the PC2100 ones.

PC2100 (266Mhz)
PC2700 (333Mhz)
PC3200 (400Mhz)
PC3700 (466Mhz)

Genrally your motherboard will support up to 2 GB of RAM. If you have an AMDAthlon XP chip then the motherboard isn't likely to be limited to 1 GB.


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OT: RAM Speed [message #62118] Thu, 15 January 2004 17:21 Go to previous messageGo to next message
IRON FART
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With your current motherboard, you can obviously only put up to a 266 MHz stick in there.

That means 266MHz and under.

But if you get under, make sure to put the faster stick in he first slot (slot 1 if not 0)
OT: RAM Speed [message #62134] Thu, 15 January 2004 20:28 Go to previous messageGo to next message
npsmith82 is currently offline  npsmith82
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General Havoc says it can be higher than 266, as he has tested himself.
IRON-FART says it must be 266 or under.

Now i'm confused, which is it?

The ram limit for my athlon XP motherboard is 1GB.
I'm planning to get two 512mb chips.


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OT: RAM Speed [message #62137] Thu, 15 January 2004 20:39 Go to previous messageGo to next message
mrpirate is currently offline  mrpirate
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As far as I know, DDR is backwards compatible, ie. a stick rated PC-3200 (400 MHz DDR) will run at 400 MHz as well as any speed below that.
OT: RAM Speed [message #62143] Thu, 15 January 2004 21:06 Go to previous messageGo to next message
exnyte is currently offline  exnyte
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What mrpirate says is true. Most memory now days is backwards compatible. You may want to check the memory out to make sure it is. The highest that it would run would be 266 although since that's what your board supports. Putting something higher than that doesn't hurt (which I have done as well). As long as the memory supports it.

OT: RAM Speed [message #62146] Thu, 15 January 2004 22:18 Go to previous messageGo to next message
Fabian is currently offline  Fabian
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npsmith82


The ram limit for my athlon XP motherboard is 1GB.
I'm planning to get two 512mb chips.


Im not positive, but i think you cant do that. If the limit is 1 gb, you cant go over it at all...correct me if im wrong please.
OT: RAM Speed [message #62147] Thu, 15 January 2004 22:23 Go to previous messageGo to next message
mrpirate is currently offline  mrpirate
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1 GB = 1024 MB = 1024² KB etc

Data is measured in powers of 2. This is done because in its simplest form, all data on computers is binary.
OT: RAM Speed [message #62148] Thu, 15 January 2004 22:33 Go to previous messageGo to next message
npsmith82 is currently offline  npsmith82
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npsmith82


The ram limit for my athlon XP motherboard is 1GB.
I'm planning to get two 512mb chips.


Im not positive, but i think you cant do that. If the limit is 1 gb, you cant go over it at all...correct me if im wrong please.


By buying two 512mb chips = 1GB.

We're talking about maximum speeds of said memory, not overall memory quantity limits in a motherboard.


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OT: RAM Speed [message #62149] Thu, 15 January 2004 23:14 Go to previous messageGo to next message
IRON FART
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npsmith82

General Havoc says it can be higher than 266, as he has tested himself.
IRON-FART says it must be 266 or under.

Now i'm confused, which is it?

The ram limit for my athlon XP motherboard is 1GB.
I'm planning to get two 512mb chips.

Well I said that because you said the highest your mobo can handle is a 266MHz stick. In which case it will hold true.

So if you buy a faster stick, then it will run at 266MHz no matter what. (But still remember to put it in the first slot to avoid problems)
OT: RAM Speed [message #62172] Fri, 16 January 2004 02:56 Go to previous messageGo to next message
NHJ BV is currently offline  NHJ BV
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You could buy RAM faster than 266 fine, it'll just run on 266 Mhz and not higher, therefore you might as well buy 266 Mhz and not higher (as it will probably be more expensive).
OT: RAM Speed [message #62182] Fri, 16 January 2004 04:32 Go to previous messageGo to next message
npsmith82 is currently offline  npsmith82
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Okay i've just bought two DDR PC3200 400mhz 512mb sticks, simply for the reason of future upgrades, even though my current board cannot use the memory at it's fullest, a future computer upgrade should be able to.

Besides, the price difference between the 266mhz and 400mhz speeds is tiny, about £10 ($18 USD).


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OT: RAM Speed [message #62201] Fri, 16 January 2004 07:32 Go to previous messageGo to next message
General Havoc is currently offline  General Havoc
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Yeah, they shouldn't give you any problems. If anything it is safer running them underclocked. I bought some generic (unbranded) RAM before to see what it runs like and it did have trouble running at 266 Mhz although it was branded as PC2100 it wasn't stable at that speed.

As you said it is future proof. You can stick it in an Athlon FX board if you decided to upgrade. The XP 3000+ series are dropping in price nearly day to day so even one of them are a good upgrade.


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OT: RAM Speed [message #62227] Fri, 16 January 2004 12:30 Go to previous messageGo to next message
mrpirate is currently offline  mrpirate
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I have generic RAM it can handle upwards of 440 MHz, despite originally being rated PC-3200.
OT: RAM Speed [message #62334] Sat, 17 January 2004 02:21 Go to previous messageGo to next message
flyingfox is currently offline  flyingfox
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I have the same motherboard as npsmith but it supports only SD memory.. is sd slower than drr or is ddr just a newer type?

Also, do ram shortages decrease video card performance? Just bought a radeon 9200 SE, great in small games but in big games the fps rate sinks a bit (192 ram jus now).
OT: RAM Speed [message #62360] Sat, 17 January 2004 09:08 Go to previous messageGo to next message
mrpirate is currently offline  mrpirate
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DDR SDRAM sends and receives data twice per clock cycle. So, while PC-133 SDRAM and PC-2100 DDR both work at 133 MHz, the DDR has twice the bandwidth. The reason you're experiencing slow-down in larger games is the SDRAM. Its low bandwidth limits the CPU's ability to calculate everything happening in a larger game. Also, since the 9200SE only has a 64-bit memory bus, try running texture detail as low as possible, that should make things run a bit faster.
OT: RAM Speed [message #62366] Sat, 17 January 2004 10:55 Go to previous message
IRON FART
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DDR = Double Data Rate
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