Videocard Memory Speeds ns this ns that???

[Turbo-Athlon5]

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?

 

[Martin]

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.

 

[zerozero]

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.

 

[Turbo-Athlon5]

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

 

[Turbo-Athlon5]

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