Ram Specs

lowlight · 03-19-2002, 11:24 PM

I was looking for this info, and had a tough time finding it, so I'll post it as a sticky thread for future reference.

To find the correct speed for your ram, use this formula:

1000 / ns

Some examples:

6.0ns = 166 MHz (333DDR) -GeForce 2 GTS, GF2MX*, GF4MX420*
5.5ns = 183 MHz (366DDR) -Radeon DDR, GeForce 2 Pro
5.0ns = 200 MHz (400DDR) -Radeon 8500DV AIW, GF3Ti200, GF4MX440
4.3ns = 233 MHz (466DDR) -Radeon 7500, GF2 Ultra, GF3
4.0ns = 250 MHz (500DDR) -Radeon 8500LE, GF3Ti500, GF4Ti4200
3.6ns = 275 MHz (550DDR) -Radeon 8500, GF4MX460, GF4TI4400
3.0ns = 333 MHz (666DDR) -GF4Ti4600**

* = Uses SDR Ram
** = Actually runs at 650 MHz

Notice how low spec the 8500 AIW is compared to the regular 8500... I'll definitely make note of this in the review (it REALLY affects performance, as you can imagine).

Georules · 03-20-2002, 05:36 AM

my GeForce 3 Ti200 Gainward has 4ns ram and I can easily get it to 250/550. "Safe mode" settings for it are 175/400 and "Enhanced mode" is 200/450. A bit different from what you have, but close. Most are suprised I have no problem 250/ 550 - guess good quality ram for your vid card it important.

lowlight · 03-20-2002, 09:30 AM

These are all reference specs... Some manufacturers choose to use faster than spec ram... Essentially this is what the chart is for; it should allow you to know exactly how fast your ram should be running

d3r3k · 03-26-2002, 12:15 PM

The formula I have always used is

1000/n=m

where n is equivalent to nanoseconds
and m is equivalent to megahertz

Thusly,

1000/3=333.33333...

or, RAM rated at 3ns goes at 333.333...MHz

you can also switch it around to find the ns if you know MHz

IE:

Your RAM runs at 300MHz

1000/300=3.3333...

or, it runs at 3.3ns

Oxygen · 03-26-2002, 01:52 PM

My 8500's ram is running at 275 so it's all good. (cuz powerstrip said so)

also LL, there is the 8500LELE which runs at 233/233.

lowlight · 04-03-2002, 02:11 PM

Quote:

Originally posted by d3r3k
The formula I have always used is

1000/n=m

where n is equivalent to nanoseconds
and m is equivalent to megahertz

Thusly,

1000/3=333.33333...

or, RAM rated at 3ns goes at 333.333...MHz

you can also switch it around to find the ns if you know MHz

IE:

Your RAM runs at 300MHz

1000/300=3.3333...

or, it runs at 3.3ns

That's pretty much the same

runaway · 04-04-2002, 05:49 PM

Yeah, pretty much. Yours is off by a factor of ten, but it gets the job done.

Georules · 04-04-2002, 08:46 PM

burn on LLs method ouch

lowlight · 04-04-2002, 09:28 PM

What? How can they be off when they both get the EXACT same result?

runaway · 04-05-2002, 12:13 AM

Quote:

1/ns * 100

ok, I have 5 ns ram.

1/5 = .2

...that times 100 equals 20. Looks like it's an order of magnitude low to me.

03-19-2002, 11:24 PM	#1
lowlight 37% More Evil! Join Date: Mar 2000 Location: Hong Kong Posts: 13,076	Ram Specs I was looking for this info, and had a tough time finding it, so I'll post it as a sticky thread for future reference. To find the correct speed for your ram, use this formula: 1000 / ns Some examples: 6.0ns = 166 MHz (333DDR) -GeForce 2 GTS, GF2MX, GF4MX420 5.5ns = 183 MHz (366DDR) -Radeon DDR, GeForce 2 Pro 5.0ns = 200 MHz (400DDR) -Radeon 8500DV AIW, GF3Ti200, GF4MX440 4.3ns = 233 MHz (466DDR) -Radeon 7500, GF2 Ultra, GF3 4.0ns = 250 MHz (500DDR) -Radeon 8500LE, GF3Ti500, GF4Ti4200 3.6ns = 275 MHz (550DDR) -Radeon 8500, GF4MX460, GF4TI4400 3.0ns = 333 MHz (666DDR) -GF4Ti4600** * = Uses SDR Ram ** = Actually runs at 650 MHz Notice how low spec the 8500 AIW is compared to the regular 8500... I'll definitely make note of this in the review (it REALLY affects performance, as you can imagine). __________________ You do read our reviews, right?

03-20-2002, 09:30 AM	#3
lowlight 37% More Evil! Join Date: Mar 2000 Location: Hong Kong Posts: 13,076	These are all reference specs... Some manufacturers choose to use faster than spec ram... Essentially this is what the chart is for; it should allow you to know exactly how fast your ram should be running __________________ You do read our reviews, right?

03-26-2002, 12:15 PM	#4
d3r3k I always get my man! Join Date: Feb 2001 Location: Edmonton, AB Posts: 694	The formula I have always used is 1000/n=m where n is equivalent to nanoseconds and m is equivalent to megahertz Thusly, 1000/3=333.33333... or, RAM rated at 3ns goes at 333.333...MHz you can also switch it around to find the ns if you know MHz IE: Your RAM runs at 300MHz 1000/300=3.3333... or, it runs at 3.3ns __________________ Of all the things I've lost, I miss my mind the most. The ways of God and government and girls are all mysterious, and it is not given to mortal man to understand them. -MrJoelieC ...I find myself transfixed by a shadow on the wall, or the splashing of water against a stone. I stare at it, the hours pass, the world around me drops away, replaced by worlds being created and destroyed by my imagination. A way to focus the mind. -Leonardo DaVinci

03-26-2002, 01:52 PM	#5
Oxygen Got Turbo? Join Date: Nov 2001 Location: MB, Canada Posts: 2,193	My 8500's ram is running at 275 so it's all good. (cuz powerstrip said so) also LL, there is the 8500LELE which runs at 233/233. __________________ Athlon X2 64 3800+ Asus A8N32-SLI 2x1GB OCZ EL Platinum DDR400 eVga 7800GT CO - looking for a 2nd 300GB segate SATA 2x 120GB Seagate SATA in Raid 0 SB Audigy 2

04-04-2002, 09:28 PM	#9
lowlight 37% More Evil! Join Date: Mar 2000 Location: Hong Kong Posts: 13,076	What? How can they be off when they both get the EXACT same result? __________________ You do read our reviews, right?

03-20-2002, 05:36 AM	#2
Georules Serpens Join Date: Feb 2001 Location: Tallahassee, Florida Posts: 8,549	my GeForce 3 Ti200 Gainward has 4ns ram and I can easily get it to 250/550. "Safe mode" settings for it are 175/400 and "Enhanced mode" is 200/450. A bit different from what you have, but close. Most are suprised I have no problem 250/ 550 - guess good quality ram for your vid card it important.

04-04-2002, 05:49 PM	#7
runaway Truly HARDCORE Join Date: May 2000 Location: Seattle Posts: 1,554	Yeah, pretty much. Yours is off by a factor of ten, but it gets the job done.

04-04-2002, 08:46 PM	#8
Georules Serpens Join Date: Feb 2001 Location: Tallahassee, Florida Posts: 8,549	burn on LLs method ouch