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Windows 7: Memory - Do we need more than 6 gig?

13 Aug 2010   #21
janno

windows 7 Ultimate 64-bit
 
 

Quote   Quote: Originally Posted by pparks1 View Post
Quote   Quote: Originally Posted by janno View Post
but someone told me (i think it was Sygnus) that this speeds are not reached by the MoBO, and therefor not neccesary. and with a cache of 8-8-8 it`s not neccesary better/faster than 6GB RAM with a cache of 7-7-7.
That was me that told you that tidbit of information. It's not necessarily that your motherboard won't reach that speed....it's that your CPU is not designed by default to reach that kind of speed....overclocking would be necessary to get up to that area.

Let me try to explain and I'll use my computer as an example. I have an Intel Q9550 quad core CPU which runs natively at 2.83Ghz. The Q9550 has a front side bus speed of 1333Mhz.....and because the Intel chips's are quad pumped..if you take 1333 and divide by 4, you get the true speed of 333Mhz. Now, looking at the specs of an Intel Q9550 shows that it has an 8.5x multiplier...so when you multiply 333 x 8.5 = 2.830Ghz.

So, for my computer, my motherboard takes DDR2 RAM. And remember, DDR means double data rate RAM. So, if you take my Q9550 native bus speed of 333mhz and multiply that by 2 (for double data rate), you end up with an effective speed of 667mhz. So, with a 1,333Mhz FSB motherboard and a Q9550 at stock clock speeds (333Mhz x 8.5), the RAM will run at 667Mhz. Therefore, buying DDR2-800 or DDR2-1000, or DDR2-1200...means that while the RAM "could" run that fast, it's going to continue running at 667Mhz. Thus, unless you plan to overclock and manipulate the machine, being able to run at 800, 1000 or 1200 provides no benefit whatsoever....as the RAM speeds are determined by your FSB speeds.

So, when I built my machine DDR2-667 would have provided the maximum speed that my board and CPU would use by default. However, knowing I wanted to overclock my box a bit, I instead went with DDR2-800 to provide some room before my RAM couldn't handle it.

Now, I started to experiment a bit with overclocking of my CPU. First thing I did was increase the FSB speed to 360 (from 333). With an 8.5 multiplier, that means my overall speed became (360 x 8.5) 3.060Ghz of my CPU. And with the RAM, it went to (360 x 2) 720Mhz. And things were fine here and everything ran fine.

So, I wanted to push things a bit more, so I set my FSB speed to 400 and set my mutiplier from 8.5 simply to 8.0. Thererefore, my CPU was running at 400 x 8 = 3,200Mhz and my RAM was running at it's true native speed of 400 x 2 = 800Mhz.

So, had I done what lots of others did and bought DDR2-1066 simply because I thought it would be so much faster than DDR2-800...I would have had to have overclocked my CPU to 4.264Ghz to actually get the performance of 1066 out of it.
(1066 / 2 = 533). And 533 x 8.0 (lowest multiplier I could use) = 4,264Ghz

So, while DDR2 1066 seems faster than DDR2 800..it totally depends on other factors to determine how fast it would actually be.

ok, maybe you can take al look at my specs, and tell me what DDR3 ram i need?

i`m now going for 1866Mhz...


My System SpecsSystem Spec
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13 Aug 2010   #22
fseal

Windows 7 x64 Ultimate
 
 

Well your memory bus is 1333 so in reality you only need to buy 1333 ram if you don't plan on overclocking.

However in the more is always better world even if it isn't (I say that with 12 gig of ram ) you may be hard pressed to find any quality ram company selling 1333 ram because NOONE would buy it when 1600 and higher are being sold by everyone else.

So that ram is fine, but as I said before, if the 1600 version of that same ram is a better price I'd get it because you'll be running at 1333 not 1600 or 1866 or 2000 or anything else... (Well unless your into liquid nitrogen overclocking)

A good thing to do is DL the PDF for the motherboard manual and check the lists of verified ram modules too...
My System SpecsSystem Spec
13 Aug 2010   #23
Internet Badass

Windows 7 Home Premium 64 bit
 
 

Quote   Quote: Originally Posted by Petey7 View Post
I use 4 gigs and I don't recall exceeding 50% very often. Only when running Chrome, WLMM, WMP, WLPG, Ares (P2P program), and Audacity all at the same time. It probably hits 50% without all of them open, but when using WLMM, I usually have all of them going at the same time. Right now I have a few tabs open in Chrome and WMP going and it's at 31%. So I would say at the this point in time more than 6GB probably isn't necessary for the home user.

Just for fun I'm going to try opening every program I currently have installed and see what results are on ram usage

EDIT: 36 programs in use and 54% RAM usage. I'm guessing the programs built in to windows not using much would be the reason why.
Attachment 91061
With fallout 3 and ten mods, I usually hit around 70-80%
My System SpecsSystem Spec
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13 Aug 2010   #24
sygnus21

Windows 10 Pro
 
 

Quote   Quote: Originally Posted by janno View Post
ok, maybe you can take al look at my specs, and tell me what DDR3 ram i need?

i`m now going for 1866Mhz...
janno,

Simply put, 12gig of 1866MHz RAM is a waste of money if you’re not planning on overclocking your system. The RAM will not run at those speeds on a stock system.

As to whether you should get 12gig, that’s been answered and debated starting here… https://www.sevenforums.com/overclock...tml#post892292. In the end it comes down to funds and (and the clearence issue of your CPU cooler) You just need to decide if it’s worth it.

With that said, I created this thread as not to hijack the "Show Us Your Rig" thread and would like to keep this thread on the topic of whether we need more than 6gig of RAM.

Thanks.
My System SpecsSystem Spec
14 Aug 2010   #25
Jaxryley

 
 

8 gig 1066 here and I do have a Win 7 64 bit install on another HD but prefer to use my 32 bit bit install.

So what to do with that extra ram that Windows 32 bit can't use? For starters I create a ramdrive of around 3.6 gig using that unusable ram.

Besides setting Sandboxie's storage folder to the ramdrive I also copy/paste an nLited XP VM over there.

Want to see speed then give a go. (and up to you if you wanna)

Memory - Do we need more than 6 gig?-data-ram.jpg

Memory - Do we need more than 6 gig?-hd.jpg

Memory - Do we need more than 6 gig?-rd.jpg


My System SpecsSystem Spec
14 Aug 2010   #26
pparks1

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by janno View Post
ok, maybe you can take al look at my specs, and tell me what DDR3 ram i need?

i`m now going for 1866Mhz...

Somebody else already said it but 1333 will be your native speed. And 1600 will give you some room to increase your FSB speed. That's what I would go with and save some dollars.
My System SpecsSystem Spec
14 Aug 2010   #27
profdlp

Main - Windows 7 Pro SP1 64-Bit; 2nd - Windows Server 2008 R2
 
 

With a Core i7 triple-channel system, 6GB was the sweet spot for me. 3GB wasn't going to cut it and 12GB would only have meant that I spent another $200 for bragging rights.

I built my current system a year ago and at that same time built a nearly identical system for my housemate. Her MB has six memory slots and mine has only three. When I built them I wondered if I was going to regret not having a cheaper upgrade path should I want 12GB down the road, since it would cost less to add three more 2GB sticks (like she could with her board), than it would to yank my three sticks out and replace them with a trio of 4GB sticks. I shouldn't have worried since neither one of us has ever felt limited by the 6Gb we currently have.

Quote   Quote: Originally Posted by sygnus21 View Post
...In the end it comes down to funds...
I think that's the key point.

If you are fabulously wealthy, why not go for it? If you need the extra RAM for a specific purpose, then the key word there is "need". If you don't have a specific need for outrageous amounts of RAM and don't have outrageous amounts of money, spending your dough elsewhere makes more sense.
My System SpecsSystem Spec
14 Aug 2010   #28
pparks1

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by profdlp View Post
If you are fabulously wealthy, why not go for it? If you need the extra RAM for a specific purpose, then the key word there is "need". If you don't have a specific need for outrageous amounts of RAM and don't have outrageous amounts of money, spending your dough elsewhere makes more sense.
Even if you are wealthy, if you really don't need it...why not keep your extra funds for something that you do have a need for?
My System SpecsSystem Spec
14 Aug 2010   #29
profdlp

Main - Windows 7 Pro SP1 64-Bit; 2nd - Windows Server 2008 R2
 
 

Quote   Quote: Originally Posted by pparks1 View Post
Quote   Quote: Originally Posted by profdlp View Post
If you are fabulously wealthy, why not go for it? If you need the extra RAM for a specific purpose, then the key word there is "need". If you don't have a specific need for outrageous amounts of RAM and don't have outrageous amounts of money, spending your dough elsewhere makes more sense.
Even if you are wealthy, if you really don't need it...why not keep your extra funds for something that you do have a need for?
I do not think you understand the meaning of "fabulously wealthy".

Do you think Bill Gates is sitting around peeing his pants worrying about the extra couple hundred bucks he dropped on RAM?
My System SpecsSystem Spec
14 Aug 2010   #30
pparks1

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by profdlp View Post
I do not think you understand the meaning of "fabulously wealthy".

Do you think Bill Gates is sitting around peeing his pants worrying about the extra couple hundred bucks he dropped on RAM?
No, but why not put that few hundred bucks into racing fuel for your european sports car and then take it out to the local drive and wind it out. Even when fabulously wealthy if you don't need X amount of RAM...it doesn't make great sense to simply buy it.
My System SpecsSystem Spec
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 Memory - Do we need more than 6 gig?




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