Videocard Memory Speeds ns this ns that??? - Techist - Tech Forum

 Techist - Tech Forum Videocard Memory Speeds ns this ns that???
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 01-18-2004, 08:21 PM #1 (permalink) True Techie   Join Date: Jan 2004 Posts: 104 Videocard Memory Speeds ns this ns that??? how do u figure out what speed memory is rated at running on your videocard if all u have is the ns. for examply my memory is Hynix 4ns. What speed does that ecual? __________________
 01-18-2004, 10:36 PM #2 (permalink) Monster Techie     Join Date: Apr 2002 Location: California Posts: 1,422 Some reading: http://www.pcguide.com/ref/ram/timingRatings-c.html Quick reference: (1st numerical is for SDR, then DDR effective frequency; these are the most common seen) Use 1000/x where x equals the rating in nanoseconds. (e.g. 1000/6 = 166.67 MHz) 7.5 ns = 133/266 7.0 ns = 143/286 6.0 ns = 166/333 5.5 ns = 183/366 5.0 ns = 200/400 4.5 ns = 225/450 4.0 ns = 250/500 3.6 ns = 275/550 3.3 ns = 300/600 ...etc. __________________ __________________ Martin's Page of Stuff I judge you when you use poor grammar.
 01-19-2004, 03:55 PM #3 (permalink) Ultra Techie   Join Date: Nov 2003 Posts: 506 Those nanoseconds represent billionths of seconds (x to -9 power). To find the frequency, you simply divide 1 by 0.000000004 (4ns) and this will give you your frequency (250 MHz) like Martin said. Then, if they are Double Data Rate (DDR) it means that they will read/write twice per clock rate so its the equivalent of 500 MHz clock. __________________ My gaming machine: P4 2.8 GHz 2 X 512 MHz PC3200 in dual DDR mode Intel D865PERL MOBO integrated 6.1 MAX audio Logitech duo MX mouse and KB ATI RADEON 9800 PRO
 01-19-2004, 08:06 PM #4 (permalink) True Techie   Join Date: Jan 2004 Posts: 104 so this means that my memory which runs stock at 200mhz is accually underclocked....haha so i can overclock it to a safe 250 with no problems? i have it on 222right now. with core on 322 right now. ill see how halo responds to this.. thanks guys ati radeon 9200 by the way
 01-20-2004, 02:48 PM #5 (permalink) True Techie   Join Date: Jan 2004 Posts: 104 nope didnt work at 250 which equalls 500 the i get artifacts im running it at 222 which is 444mhz and its ok wtf? its 4.0ns HYNIX memory

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