Karl`s PC Help Forums

which Ram to use
gavb - 10-1-2008 at 14:46

Hi, new to the forum and to upgrading PCs

After an online check,I have a Gigabyte 7VT600 motherboard. I want to increase my RAM to 1gb. I currently have 256mb.

It says I can only use DDR SDRAM then the checker said that I could use PC2700 PC3200 AND PC4000.

My questions are
whats the difference in numbers mean?

does DDR mean DDR1 and is RAM theb same as SDRAM

is it cheaper or better to buy a 1gb stick or buy 2x 512mb?

will my 256mb work alongside added Ram

what is the average price as I dont want to pay over the odds?

Many thanks


Redwolf5150 - 10-1-2008 at 15:37

The more tech savy members of the board will want to know the make of your machine and OS to help you.

Welcome to the funhouse, BTW.

kewl_glasses


Topcat - 10-1-2008 at 16:18

The links will explain a bit more.

http://www.ddrsdrammemory.com/identifying_size_of_ram.html


Topcat.


Topcat - 10-1-2008 at 16:23

Copied from Web

(Synchronous DRAM) A type of dynamic RAM (DRAM) memory chip that has been widely used since the late 1990s. SDRAM chips eliminated wait states by dividing the chip into two cell blocks and interleaving data between them. While a bit in one block is accessed, a bit in the other is prepared for access.

Double Data Rate (DDR)
DDR SDRAM doubles transfer rates by transferring data on both the rising and falling edges of the clock. DDR uses a 184-pin DIMM module in contrast to the 168-pin DIMM of earlier SDRAMs. Laptops use 200-pin SODIMM modules.

DDR2 and DDR3
DDR2 chips increase data rates using various techniques such as on-die termination, which places the terminating transistors that eliminate excess signal noise on the chip itself. DDR3 offers a moderate speed improvement over DDR2, owing to 90 nm fabrication (see feature size).

DDR2 and DDR3 use 240-pin DIMM modules. DDR, DDR2 and DDR3 modules are all keyed differently so that they cannot be inserted into the wrong motherboard slots.

Dual Channel
Chipsets on the motherboard may support two independent memory controllers, which allow access to two memory modules simultaneously (upstream data on one 64-bit channel; downstream data on the other). Channels can be configured as two 64-bit or one 128-bit. Modules must be installed in matched pairs unless the chipset has an option for mismatched modules. See memory module and SGRAM.

In the following list, the single channel speeds are given. If dual channel is implemented, the memory speed and data rates are doubled, and many memory products use the doubled rate in their chip designations.



Single
Channel Single
Memory Channel DIMM
Type Speed Symbol Data Rate Module

DDR3 800MHz PC3-12800 12.8 GB/sec 240-pin
DDR3 667MHz PC3-10600 10.6 GB/sec 240-pin
DDR3 533MHz PC3-8500 8.5 GB/sec 240-pin
DDR3 400MHz PC3-6400 6.4 GB/sec 240-pin

DDR2 533MHz PC2-8500 8.5 GB/sec 240-pin
DDR2 500MHz PC2-8000 8.0 GB/sec 240-pin
DDR2 400MHz PC2-6400 6.4 GB/sec 240-pin
DDR2 375MHz PC2-6000 6.0 GB/sec 240-pin
DDR2 333MHz PC2-5300 5.3 GB/sec 240-pin
DDR2 266MHz PC2-4200 4.2 GB/sec 240-pin
DDR2 200MHz PC2-3200 3.2 GB/sec 240-pin

DDR 266MHz PC-4200 4.2 GB/sec 184-pin
DDR 200MHz PC-3200 3.2 GB/sec 184-pin
DDR 166MHz PC-2700 2.7 GB/sec 184-pin
DDR 133MHz PC-2100 2.1 GB/sec 184-pin
DDR 100MHz PC-1600 1.6 GB/sec 184-pin


Single Channel
Speed

SDRAM 133MHz 1.1 GB/sec 168-pin
SDRAM 100MHz 800 MB/sec 168-pin


Topcat.


Daz - 10-1-2008 at 16:43

Click HERE and this will tell you what Crucial recommend for your Motherboard.... (Crucial are very well respected in the Memory world...)

Personally, I'd pick between These two... I wouldn't bother going for the very high end RAM to be honest, unless your system warrants it....


KOUROSH - 10-1-2008 at 17:05

others have fully explained about ddr ram,
theoretically you should know your motherboard in and out, look at the motherboard manual it will tell you what ram configure best with your motherboard if it say pc 2700 200 then going any higher would be a waste of money (there are pc4000) in a sense you woun't get much better performance.

will1GB work with with 256?? it will work but if you look at your motherboard manual you will see they suggest you to have two equal ram next to each other for best performance. make up your mind and decide how much you want to spend. 1 Gb only or two 1GB or two 512 MB ram are best choices for your pc. price wise price of 1 GB usually is higher than two 512 . again you can go to ebay and it is one of those lucky days and you might get 1 GB for the same price as 2X512 mb .

link below might give you some idea about ddr ram prices
http://www.offtek.co.uk/desktopmem.php?maincat=1&subcat=2


gavb - 14-1-2008 at 13:47

Thank you everyone.

I will check crucial and probably go for 2x512 as its cheaper. Thanks again