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Upgrade Memory?

Last response: in Memory
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December 1, 2010 3:34:55 AM

I just put windows 7 64 bit on my computer. All in all it runs perfectly, but I'd like to upgrade my memory to 4 gigabytes. My computer is a Dell XPS 400... I currently have 2 gigs of ram. When I checked on Speccy, this is what it said about my memory:

2.0GB Dual-Channel DDR2 @ 265MHz (4-4-4-12)

Now, I'm confused because on Kingston's website, it says this:

This system is configurable and can ship with either DDR2-533 (KTD-DM8400A/xx) or DDR2-667 (KTD-DM8400B/xx). When mixing DDR2-533 and DDR2-667 modules, the system will default DDR2-533 speed.

So did I get jipped out of my memory speed when I bought this system, or Does the 265 effectively double because its dual channel? I don't know much about memory and this is my first upgrade. Lastly, what should I actually get to upgrade to 4 gigs?

It looks like I was ripped off upon time of purchase. This computer only has DDR2 4300, while all memory manufactures claim it (Dell XPS 400) ships with and supports either DDR2 PC2-5300 or DDR2 PC2-6400. So that's why my speed is only 266 mhz. Should I install a brand new set of 4 gigs of memory of DDR2 PC2-6400 or just add 2 more and deal with the reduced speed?

So all in all, should I just buy a new set of 4 gigs, add 2, or just leave it the way it is?
Thank you

RAM
Memory slots
Total memory slots 4
Used memory slots 2
Free memory slots 2
Memory
Type DDR2
Size 2048 MBytes
Channels # Dual
DRAM Frequency 265.8 MHz
CAS# Latency (CL) 4 clocks
RAS# to CAS# Delay (tRCD) 4 clocks
RAS# Precharge (tRP) 4 clocks
Cycle Time (tRAS) 12 clocks
Bank Cycle Time (tRŠ”) 16 clocks
SPD
Number Of SPD Modules 2
Slot #1
Type DDR2
Size 1024 MBytes
Manufacturer Infineon
Max Bandwidth PC2-4300 (266 MHz)
Part Number 64T128020HU3.7A
Serial Number 0100DB12
Week/year 28 / 06
SPD Ext. EPP
JEDEC #3
Frequency 266.7 MHz
CAS# Latency 5.0
RAS# To CAS# 4
RAS# Precharge 4
tRAS 12
tRC 16
Voltage 1.800 V
JEDEC #2
Frequency 266.7 MHz
CAS# Latency 4.0
RAS# To CAS# 4
RAS# Precharge 4
tRAS 12
tRC 16
Voltage 1.800 V
JEDEC #1
Frequency 200.0 MHz
CAS# Latency 3.0
RAS# To CAS# 3
RAS# Precharge 3
tRAS 9
tRC 12
Voltage 1.800 V
Slot #2
Type DDR2
Size 1024 MBytes
Manufacturer Infineon
Max Bandwidth PC2-4300 (266 MHz)
Part Number 64T128020HU3.7A
Serial Number 01011215
Week/year 28 / 06
SPD Ext. EPP
JEDEC #3
Frequency 266.7 MHz
CAS# Latency 5.0
RAS# To CAS# 4
RAS# Precharge 4
tRAS 12
tRC 16
Voltage 1.800 V
JEDEC #2
Frequency 266.7 MHz
CAS# Latency 4.0
RAS# To CAS# 4
RAS# Precharge 4
tRAS 12
tRC 16
Voltage 1.800 V
JEDEC #1
Frequency 200.0 MHz
CAS# Latency 3.0
RAS# To CAS# 3
RAS# Precharge 3
tRAS 9
tRC 12
Voltage 1.800 V

More about : upgrade memory

a c 163 } Memory
December 1, 2010 12:10:51 PM

Hi Loucolu and welcome to Tom's forum.

Your RAM is fine and is working @533MHZ. Why?

DDR2 means double data rate, in simple words you need multiply by 2 the speed that you see, so, 265MHz x 2 ~= 533MHz, that is the rated speed of your RAM for dual channel.

Now, 4GB will give you more advantage on games and general purpose.
December 1, 2010 4:42:08 PM

Oh Ok, excellent. Thanks for the response!!! So with that said, What would be a good additional 2 gigs (1gb sticks) of ram to buy for around 50?
Related resources
December 2, 2010 4:15:23 AM

Excellent!!! Thank you so much. Your help is much appreciated.
a c 163 } Memory
December 2, 2010 1:33:37 PM

Your welcome ;) 
December 10, 2010 7:49:38 PM

I bought the memory you suggested but I'm kind of a newb when it comes to installing new components. I opened the case and Tried to put the memory in but I couldn't get it. So I have a few questions.
Does it matter what direction I put it in? I know the metal prongs face down, but what direction do I turn it?
Also, in my case, the first and third slots have the original memory in them, but the 2 and 4 are empty. Should I take the chip out of slot 3 and match it with 1 and then put the 2 new chips in slots 3 and 4? Finally, the memory i bought looks very different than the one already in my computer. The one in my computer is much taller than the one I just bought. Length wise, they seem the same. I'm gonna try installing again tonight with more time. Any ideas? Thank you very much!
a c 163 } Memory
December 11, 2010 2:10:38 AM

1- Yeah, the RAM stick has an orientation, check this, the last picture. Your RAM is the image of the middle, can you see the little notch in that image? That little notch match with another one in you mobo.
2- Install the new one in the 2nd and 4th slot.
December 11, 2010 4:54:29 AM

I followed everything you said and I got it right on. Unfortunately, I have the older Intel 945 chipset and I read online that even with a 64 bit os, it can only use 3.5 gigabytes of ram because of something to do with memory mapping. Regardless, I'm happy I have the extra memory and everything went so smoothly. I definitely couldn't have done it without your help so thank you very much for everything. I've learned a lot about memory, thats for sure. Thanks again
a c 163 } Memory
December 11, 2010 4:17:31 PM

Your welcome, and enjoy it ;) 

Keep coming to the forum to learn more about RAM, problems and a lot of things.
!