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 Ram speed Explained

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Israfil
I'm not emo! It's just no-one understands me T_T
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PostSubject: Ram speed Explained   Tue Oct 07, 2008 3:50 am

Basicly what i was told by you chaps tonight "About CPUZ showing that it was running at 2x400 MHZ and how having 2 Frquncies dosent matter as its still running at 400 insted of 800" I have Discoverd the truth. And simon mate this applies to you aswell regarding your run problem i think.

DDR2-800 memory runs at an *effective* rate of 800MHz, but an *actual* rate of 400MHz.

Prior to DDR memory, we had SDR memory which only processed data on ONE side of the memory cycle. When DDR was introduced, data was now processed on BOTH sides of the memory cycle, so the effective throughput doubled, but the actual speed of memory did not change. In order to differentiate DDR memory from SDR memory (and emphasize the improved performance), manufacturers decided to label/market DDR memory w/ the effective rate instead of the actual rate.


This was in reply to some guys asking about the problem i had viewing his Ram speed.

So basicly if CPUZ says its running at 400 or 533 your ram as running at 800/1066 due to the nature of how CPUZ reads the clock speed.

However any other issues "from reading this thread ive seen afew posible ones" such as Voltage may cause slow performance on the ram.

BASICLY in short. if your running DDR2 CPUZ will show the ram at half of what it is so dont worry.
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Ashrak
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PostSubject: Re: Ram speed Explained   Tue Oct 07, 2008 12:03 pm

Yeah thats about right mate. Single Data Rate RAM and Double Data Rate RAM. Told you it was a bit complicated Smile

To get our RAM running at the proper speeds of 1066 rather than 800 we need to sort out the clocking and the FSB.. which is where my knowledge gets a bit grey...

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Ashrak
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PostSubject: Re: Ram speed Explained   Tue Oct 07, 2008 7:41 pm

Also from reading today about cpu clocking etc... our chip activates a power saving mode on the board.. where the load of your computer (light, medium, heavy usage) determines what speed things run. e.g if your sat on the net the chip will run at 1.6ghz.. and the RAM will not be using as much speed. but when you load a game up or something the system deems heavy load, then the rest of the power kicks in.. I've tested with my 20% bios overclock.. it takes, unreal 3, 1 video, firefox and winapm playing music to knock it up to the overclock Smile 2.8ghz. close 3 or more of them progs down and it drops to 2.4ghz, close them all.. 1.6ghz Smile

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