Memory of different speeds

link1305 · 04-04-04, 02:52 PM

Right now in my AthlonXP 1800 server I have 256mb of PC2700 RAM. If I get new RAM for my main computer, I'd add that 512mb of PC2100 RAM to the server. Would the 2 different speeds work fine with each other?

Top Hat Theater · 04-04-04, 05:44 PM

Yes however the PC2100 will limit the FSB at which the system can run.

~THT

I.M.O.G. · 04-04-04, 05:44 PM

They would both run at the speed you have the FSB set to... 133mhz if it is at stock settings.

The ram does not run at the speed it is labeled for, it is simply labeled for the speed it is rated to be able to run at. The RAM speed of operation is controlled by the FSB.

So PC2700 ram is rated to run at an FSB frequency of 166mhz at a certain voltage and RAM timings. PC2100 RAM is rated to run at an FSB frequency of 133mhz at a certain voltage and timing. This means that if you mix the two types of RAM, you will be limited by the PC2100 RAM - this is because you have to run both sticks at the same rate, they cannot be set differently.

04-04-04, 02:52 PM	Thread Starter #1
link1305 Member Join Date: Apr 2003 Location: Cleveland, Ohio	Memory of different speeds Right now in my AthlonXP 1800 server I have 256mb of PC2700 RAM. If I get new RAM for my main computer, I'd add that 512mb of PC2100 RAM to the server. Would the 2 different speeds work fine with each other? __________________ Main System i7 930 \| 12GB DDR3 1333 \| Gigabyte GA-X58A-UD3R \| EVGA GeForce GTX 470 \| OCZ ModXStream 700w \| 60GB OCZ Vertex \| 74 GB Raptor \| Corsair 600T Boots Gentoo and Win 7 x64 Roadcase Core 2 Duo 6750 \| 4GB RAM \| GeForce 8800 GTS \| 30 GB OCZ Vertex \| 500GB Seagate 7200.11 \| OCZ ModXStream 500w ---------------------------------------------------------------------------------------------------------------------- Server 2x Opteron 280 \| Asus K8N-DL \| 2gb Registered DDR RAM \| 1 TB Hitach \| 320GB Seagate \| Gentoo Linux running MythTV
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04-04-04, 05:44 PM	#2
Top Hat Theater Member Join Date: Jul 2002 Location: Lost in Thought	Yes however the PC2100 will limit the FSB at which the system can run. ~THT
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04-04-04, 05:44 PM	#3
I.M.O.G. Glorious Leader Join Date: Nov 2002 Location: Rootstown, OH	They would both run at the speed you have the FSB set to... 133mhz if it is at stock settings. The ram does not run at the speed it is labeled for, it is simply labeled for the speed it is rated to be able to run at. The RAM speed of operation is controlled by the FSB. So PC2700 ram is rated to run at an FSB frequency of 166mhz at a certain voltage and RAM timings. PC2100 RAM is rated to run at an FSB frequency of 133mhz at a certain voltage and timing. This means that if you mix the two types of RAM, you will be limited by the PC2100 RAM - this is because you have to run both sticks at the same rate, they cannot be set differently. __________________ The OC Forums Way We are a team. We are a community. We are a fellowship made strong by mutual respect and shared dedication to the task of enriching all who come here. The OC Forums Thank You Thread Put your computer to work for our OC Forum Teams! Try out our POST TEMPLATES, they save you time answering common questions! I spend half my money on CPUs, GPUs, and Liquid Nitrogen. The other half I waste.
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