Diff between 5400 and 5300 DDR2 memory

Exiler · Nov 18, 2007

I am a little confused on the 5300 and 5400 number for DD2 Memory.

I am trying to buy a 2GB DDR2 SODIMM for my laptop. Now under CPU-Z it says I am using DDR2 PC-5300 667Mhz.

now when I go looking fo mem parts, I see some memory stating 5400 but at 667Mhz, I am confused as 5300 are also listed at 667Mhz too.

So whats the real deal with the 5400 and 5300?

>HyperlogiK< · Nov 18, 2007

AFAIK they are exactly the same, both run at 667Mhz:

667MHz × 8 = 5336 MB/s

sometimes the bandwidth gets rounded up to 5400MB/s and sometimes it gets rounded down to 5300MB/s it just depends on the manufacturer. I have heard it claimed that memory labelled as PC5400 was PC5300 that would OC better, but it sounds like BS to me because 667Mhz to 675Mhz ain't much of an OC.

Sam__ · Nov 18, 2007

>HyperlogiK< said:
AFAIK they are exactly the same, both run at 667Mhz:

667MHz × 8 = 5336 MB/s

sometimes the bandwidth gets rounded up to 5400MB/s and sometimes it gets rounded down to 5300MB/s it just depends on the manufacturer.

^^^^^ yuhuh....thats pretty much it.

Clockwork_Apple · Nov 19, 2007

I thought PC2 5400 was rated at 675Mhz and PC2 5300 was rated at 667Mhz.

Never seen the reason to have the difference, when they're so similar.

>HyperlogiK< · Nov 19, 2007

You may be right, but when I fire up CPU-Z the PC5400 in my laptop doesn't have SPD data for 675Mhz.

largon · Nov 19, 2007

I have here:
1 stick of Corsair CM2X1024-5400C4 DDR2-675 4-4-4-12
and
2 sticks of Teamgroup TXDD1024M667HC3-M PC5300 DDR2-667 3-3-3-8

Clockwork_Apple · Nov 19, 2007

largon said:
I have here:
1 stick of Corsair CM2X1024-5400C4 DDR2-675 4-4-4-12
and
2 sticks of Teamgroup TXDD1024M667HC3-M PC5300 DDR2-667 3-3-3-8

Well that's the difference then.

Hyper, I'm guessing that CPU-Z just reports the 675Mhz SPD table as 667Mhz :shrug:

>HyperlogiK< · Nov 20, 2007

Yeah, you're probably right.

Diff between 5400 and 5300 DDR2 memory

Exiler

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