Help me interpret my dmiencode results to figure out what kind of RAM slots I have

Question

I have a question about a retain and a NSString, if I have a method who a return a NSString, and I put the return NSString in a nsstring variable, I must do a retain or not?

NSString *myString = @"";
myString = [self methodWhoReturnString]; // I must do this?
myString = [[self methodWhoReturnString]retain]; // Or I must do this?

Solution

There are two sets of colors in order to help you match them in pairs, if you wish to. Other than that, they are all the same.

The Type: DDR has a valid value as long as memory is installed to a slot. If there is no memory there, then it gives the stock DDR value.

Comments

[Eiko]

Additionally to what's in the answers, you'll only need to retain/copy it, if you are actually storing it for later use. If you just use it immediately then even an autoreleased object is fine.

[boehj]

Now you've got DDR2-800 RAM (aka PC6400 DDR2) in there. Why do you say it's probably wrong?

[brenton]

I just found it in my pile of scrapped parts. It's probably too fast or too slow or some other spec is off, I don't really know how to match ram to a mobo, I just see if it fits and then see if it boots. Buying ram is different, I'm hoping to get the right kind.

[JeremyP]

This is wrong. You own the object if you create it with alloc or new, or if you obtain it with a method containing copy, or you retain it. init does nothing to the retain count. I would have down voted but the stuff about creating a property is good advice.

[Matt Williamson]

@JeremyP you are right. It is alloc, new* and *copy. I mixed them up. Sorry.

[jlehr]

It's also incorrect to say that self.myProperty = something will automatically call -retain. That's only true if the property is declared with retain rather than -copy` or assign as its memory management semantic.

[JeremyP]

not that tough, nobody has down voted. In fact, if you edit your answer to incorporate my comments and jlehr, I'd be tempted to up vote.

[brenton]

Ok, so you're saying they're probably all DDR2?