Ram work at ddr 333 instead of ddr 400.

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I_Like_Computers

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Feb 4, 2007
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I got 1gb of new ram for my computer. It was a ddr 400 but it says ddr 333 on bios. Is this because my CPU is to slow? It's a AMD Athlon 64 3500+. I would expect it would run the ram at its full potential since the CPU isn't that bad.

I can force my ram to ddr 400 in bios. But i'm afraid I might damage it. Need some advice on what to do.
 
PX7800GT

PX7800GT

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No. I have a single one. One 1gb PC3200 Ram.
Click to expand...
...i heard that AMD64 based pc with 4 sticks of memory have the same problem ,but with one stick... ,i dont know ,maybe someone else can help but i wouldnt force them to DDR400 if i were you!
 
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I_Like_Computers

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It's not complicated. Either it works at DDR-400 (under the manufacturer's specified settings) or it doesn't and can be returned for replacement under warranty.
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Lol, to late for the warrenty. Hmm... Pc3200 works at ddr 400 right? I wouldn't think my CPU would be to slow. Just a thought.
 
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joex444

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The physical DIMM says either DDR400 or PC3200 on it, correct?

Then force it to run at 400MHz, using the manufacturer specified timings, then test it to make sure it is a good stick.
 
Mobius

Mobius

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It doesn't matter that your memory is running at 333 speeds (PC 2700) because you fouled it by installing a single stick of RAM. Unless you have that shit-useless chipset in the early days of AMD64 that did not support dual channel, then your motherboard REQUIRES 2 sticks of memory to make the full memory bandwidth available.

DDR 400 (PC3200) in dual channel mode results in 6.4 GB/s of memory bandwidth, while a single stick at 333 results in 2.7 GB/s of bandwidth.

So, it's fairly safe to say that your "upgrade" did nothing except drop your memory bandwidth from 6.4 to 2.7 GB/s...

There's one born every minute, isn't there? o_O
 
Mondoman

Mondoman

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...

So, it's fairly safe to say that your "upgrade" did nothing except drop your memory bandwidth from 6.4 to 2.7 GB/s...
Click to expand...
Not so safe, M!
Assuming that he increased the total amount of RAM in the system, Windows and most apps will certainly run better, even with the reduced RAM bandwidth.
 
quantumsheep

quantumsheep

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The physical DIMM says either DDR400 or PC3200 on it, correct?

Then force it to run at 400MHz, using the manufacturer specified timings, then test it to make sure it is a good stick.
Click to expand...

good advice there, it should work fine. Some motherboards will auto set it to PC2700 rather than PC3200 'cos they're weird.
 
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IceBlue666

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hello just set the ram speed in your bios to ddr400 it should work without any problems. I got the same problem when I upgraded to 1GB. I just had to put in ddr400 manually
 
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lurk3r

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With only one stick you will be degraded to 64 bit mode instead of 128 for dual. Your memory will still run at its rated speed (DDR 400). Most AMD boards will have issues with more than 2 sticks of DDR 400, 4 will force it to run at 333. I think I saw a few of the newer 939 boards support 4 DDR 400 chips. The bottome line is even with slower access you will still be much faster with more ram. You can greatly help out your performance later by adding a second 1 Gb DDR 400 chip in the correct slot on your MB.
 
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