200 mhz vs 400 mhz

[j33hopper]

Property Value
Memory Summary
Location System board or motherboard
Maximum Capacity 4096 MBytes
Memory Slots 4
Error Correction None
Use System memory
Maximum Memory Module Size 1024 MBytes


Device Locator Slot 1
Manufacturer Elpida
Part Number EBD52UC8AKFA-5B
Serial Number 71008944
Capacity 512 MBytes
Memory Type SDRAM DDR
Speed PC3200 (200 MHz)
Data Width 64 bits
Voltage SSTL 2.5V
Error Correction None
Refresh Reduced (.5x)...7.8 µs
Manufacturing Date 2004, Week 3
EPP SPD Support No


Device Locator Slot 2
Manufacturer Elpida
Part Number EBD52UC8AKFA-5B
Serial Number 710083DD
Capacity 512 MBytes
Memory Type SDRAM DDR
Speed PC3200 (200 MHz)
Data Width 64 bits
Voltage SSTL 2.5V
Error Correction None
Refresh Reduced (.5x)...7.8 µs
Manufacturing Date 2004, Week 3
EPP SPD Support No

Warning! Accuracy of DMI data cannot be guaranteed


The above is the memory i currently have. Im having a hard time finding pc3200(200mhz) for a upgrade(trying to find 2x512mb. I can find 400mhz no problem. Does it matter if I put 2x512mb(400mhz) in with my 200mhz speed current memory? Will it affect anything? Will it work even?

Thanks in advance for any help

 

[monst0r]

The 400mhz is most likely DDR2 (not DDR as you would need). If it was DDR2, then it wouldn't fit in the slot at all. Some memory may refer to it being 400mhz effective, don't confuse the two 😛

 

[j33hopper]

Computer Memory - 512MB - PC3200 / 400MHz DDR

So would the the above i mentioned here work?

 

[antas]

Have you tried to consult your mobo's website?

Btw, IMO PC3200 is 400MHz not 200MHz. The DDR is Double Data Rate, which means that your memory actual speed is 200MHz, but since it's double data rate then it's got 400MHz rate (or by means are equal to 400MHz). It is like the AMD processors, they love to use this term as well, their Athlon 3200 for example, has 1800MHz in reality, but due to their technology, its 1800MHz is equal to previous 3200MHz in computing speed.

So maybe your software will read your RAM as 200MHz instead of 400MHz. How do you get that read? Is it from some softwares? Try to get CPUZ (http://www.cpuid.com/cpuz.php) (last version, 1.43) to see your mem spec in more details.

I'm quiet sure that PC3200 is 400MHz (since 3200/8 = 400).

 

[antas]

EDIT: I should revised my previous post.

I just run CPUZ on my computer and it turns out that it reads the actual memory too. Mine is PC2-5300 and was read as PC2-5300(DDR2 333). PC2-5300 is DDR2 667, you'll see PC2-5300 (DDR2 667) wherever you see in any retails (newegg etc).

 

[j33hopper]

Thanks Antas. That helped alot.

 

[apache_lives]

God dam noobs, 2.5v is DDR1, PC3200 - 3200 divided by 8 (bit) gives you 400 (MHZ) DDR

Double Data Rate (effective) means your memory IS running at 200mhz (max) but will perform like 400mhz (effective)

Either way if you buy 400mhz memory and your motherboard only can use 200mhz (rare, first generation DDR motherboards), it will down clock (underclock) your memory to match - memory doesnt care what it runs at aslong as its below the rated (max) speed, and prolly a bit above too (overclocking).

You can slap in another 512mb of DDR400/PC3200 fine, but remember memorys golden rules - 1) least amount of sticks and 2) most matching/matched etc (for dual channel, matched), but you should get away fine slapping in another 1x512mb to make 1gb.