Ram Question? - Techist - Tech Forum

 Techist - Tech Forum Ram Question?

 07-10-2009, 11:24 PM #1 (permalink) True Techie   Join Date: Feb 2009 Posts: 146 Ram Question? I got a question, when looking at different types of RAM for PC's i see that it has two different numbers for the speeds. one of then is the MHz which i understand, but the one i dont understand is the PC-5400 or like PC2-6500 or something like that. Could some one please explain to me what this speed rating is of, and how its calculated. thanks you. __________________ __________________
 07-11-2009, 02:10 AM #2 (permalink) Lord Techie     Join Date: Feb 2004 Location: Sweden Posts: 9,093 Re: Ram Question? the number pc3200 is the maximum transfer rate in MB/sec. As a general rule you multiply speed X 8 to get maximum transfer rate. So as an example ddr400 pc3200 ram runs at 400mhz so 400 x 8 = 3200 or pc3200 for the maximum transfer rate. __________________ __________________ ASUS P6T Deluxe V2 :: INTEL i7 920 @3.4 :: XFX GTX260 :: 6gb Corsair 1600 :: Corsair 750TX :: TRUE 120 :: Samsung T240 24" :: Windows 7 X64 I do not accept support questions via PM "Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety."
 07-11-2009, 11:09 AM #3 (permalink) True Techie   Join Date: Feb 2009 Posts: 146 Re: Ram Question? ok that makes sense. why is by multiplied by 8 though? just curious, and does that value ever change? __________________
 07-11-2009, 11:20 AM #4 (permalink) Super Techie   Join Date: Jul 2006 Posts: 283 Re: Ram Question? I believe 8 stands for 8 bits in a byte __________________
 07-11-2009, 12:17 PM #5 (permalink) Lord Techie     Join Date: Feb 2004 Location: Sweden Posts: 9,093 Re: Ram Question? The maximum transfer rate for a memory module can be calculated thru the following formula: Maximum Theoretical Transfer Rate = clock x number of bits / 8 Since DIMM modules transfer 64 bits at a time, “number of bits” will be 64. As 64 / 8 equals to 8, we can simplify this formula to: Maximum Theoretical Transfer Rate = clock x 8 Understanding RAM Timings | Hardware Secrets __________________ ASUS P6T Deluxe V2 :: INTEL i7 920 @3.4 :: XFX GTX260 :: 6gb Corsair 1600 :: Corsair 750TX :: TRUE 120 :: Samsung T240 24" :: Windows 7 X64 I do not accept support questions via PM "Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety."
 07-12-2009, 01:58 PM #6 (permalink) True Techie   Join Date: Feb 2009 Posts: 146 Re: Ram Question? Wow thats cool. lol. its like im understanding a different language here, haha. but it all makes sense so its all good. __________________ __________________

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