View Full Version : Good DDR for OCing?
Garfield
01-26-02, 08:43 PM
I'm about to build a computer and I would like to know if this is good RAM for OCing. Here is the description from newegg.com:
CRUCIAL MICRON 256MB 32x64 PC 2100 DDR RAM - OEM 184-Pin, CL=2.5-Unbuffered 2.5V CT3264Z265.16T. Requires DDR supported Motherboard
Thanks!
Garfield
It's pretty good. I have Micron in all my systems and they give me 160MHz+ on the bus.
KingMax looks to be good as well if you can get their rated memory (PC2400-PC2700) as it's supposedly guaranteed to overclock to its respective speed.
Garfield
01-26-02, 08:48 PM
>> It's pretty good. I have Micron in all my systems and they give me 160MHz+ on the bus. <<
So what you mean here is that I can raise the FSB to 160 with no problem? Is that what you are insinuating? Thanks! :D
Garfield
Yes that is good memory for overclocking, how high it will overclock will depend on how much of it you use, the motherboard and voltage.
In general expect at least 150mhz with 2 sticks.
Garfield
01-26-02, 08:51 PM
>> In general expect at least 150mhz with 2 sticks. <<
When you say 150, you mean how high you can raise the FSB for stable RAM? Thanks!
Garfield
Yes that is what I mean :)
Garfield
01-26-02, 08:57 PM
Okay, thanks! I'm new to the OCing idea.
What port/device is most limiting when you OC? What I mean is that this RAM will be stable to around 150, but another device will be unstable below 150. Which device will be the most limiting when OCing? Thanks! :)
Garfield
The motherboard, then cpu, then memory.
You really need all three to be good for overclocking.
From reading your other posts you are building a amd based system.
Garfield
01-26-02, 09:05 PM
What, on average, can you raise the FSB to so that an average good motherboard will still be stable?
If the cpu and other componets are not the limiting factor 155-165fsb.
There are some boards that don't like over 140fsb and others that run stable at 190+.
I have the motherboard you're considering and it gives me 160MHz no problem. Did require 3.0V to the memory to do it but is perfectly stable.
Depending on whether the rest of your devices can handle high bus speeds (NIC, sound card, etc.), you should have no problem hitting at least 150MHz with what you have now.
A good way for a first system is find someone reliable like Jon.
Then copy his system close as you can.
...also newby question - after ordering :-):-)
Do i guess right the 2700 makes somehow less sence in P4 systems? Or the other way round: The 2100 = 266 are perfect/enough for 133Hz overclocking the northwood, no?
Could it be right: this changes when Intel changes (rumors...) to 133 FSB P4, then 2700 could make sence, no?..
Interesting stuff:-) Max
ThePunkGeek
01-27-02, 09:22 AM
Originally posted by Garfield
Okay, thanks! I'm new to the OCing idea.
What port/device is most limiting when you OC? What I mean is that this RAM will be stable to around 150, but another device will be unstable below 150. Which device will be the most limiting when OCing? Thanks! :)
Garfield
i heard that because your overclocking all your card alot of the time an ethernet card will hold you back not your ram psu voltage or mobo
CMangano
01-29-02, 01:02 PM
Jon or anyone,
How do you change the voltage on your RAM? Can you do it in the bios?
The Doors
01-29-02, 03:57 PM
Originally posted by CMangano
Jon or anyone,
How do you change the voltage on your RAM? Can you do it in the bios?
Hi CMangano, welcome to the Forum,
Yes, take a look for a Bios setting called 'Vio' ;)
sorry but i have really been wondering this and it seems like the right thread to ask.
if you have a motherboard rated for pc 2100 do you have to use pc2100 or could you use pc2400 or pc2700? would that matter, does it downgrade the ram, and when you overclock would the higher speed be better?
i have totally no idea on ddr it just confuses me to no end.
as always thanks for any replys. and i dont mean to change the topic it just kind of (not really fits)
2100 just means the memory is guaranteed to run at a fsb of 133 or 266 ddr.
The 2400 is 150fsb and 2700 166fsb.
You can use the higher rated ones on a board that is 2100 fine.
You will not get a performance increase unless you overclock the fsb.
If your 2100 overclocks fine to 150fsb and you have 2400 and use it at 150fsb there is no real difference.
Originally posted by CMangano
Jon or anyone,
How do you change the voltage on your RAM? Can you do it in the bios?
The soyo dragon plus is one of the few boards that have no voltage adjustment for the memory.
Originally posted by Placid
2100 just means the memory is guaranteed to run at a fsb of 133 or 266 ddr.
The 2400 is 150fsb and 2700 166fsb.
You can use the higher rated ones on a board that is 2100 fine.
You will not get a performance increase unless you overclock the fsb.
If your 2100 overclocks fine to 150fsb and you have 2400 and use it at 150fsb there is no real difference.
well i dont have any im in the process of upgrading and would it be better to get a higher rated ram or does it not matter?
If you plan to overclock very high fsb's over 160mhz then yes otherwise no unless you think you might upgrade to a amd kt333 or kt333a motherboard when they come out.
Garfield
01-29-02, 09:08 PM
>> 2100 just means the memory is guaranteed to run at a fsb of 133 <<
Yes, but this is the "default" FSB, so you can oc 2100 to over 133, right? This is my understanding of this. What FSB is safe to keep the RAM stable? Thanks...
Garfield
Yes you can run 2100 higher than 133fsb, how high you can do so and be stable is nothing no one can say for sure, one person's cpu overclocks to 1800mhz and someone else with the same cpu only overclocks to 1700mhz.
Same thing with memory it should run at what it is rated or you can complain and get exchange, how far it will overclock is not guaranteed.
Silverstain
01-29-02, 10:06 PM
I have a question that kind of has to do with this. I'm planning on getting a KR7A-Raid with an AMD XP 1800+. I was looking at getting PC2700 ram, but i noticed that there is special PC3000 for a few specific boards, including the KR7A-Raid. Anyone try out this stick? Is it worth it, or not? Also, what are the o/c abilities of the KR7A-Raid?
You must mean ocz 3000.
Some like it, others hate it.
Dosen't seem like a "sure thing" to me.
The kr7a is a very good overclocker but has no 1/5 pci divider so unless you don't mind running your agp/pci far out of spec you probably won't want to run more than 170mhz for everyday use.
Silverstain
01-29-02, 10:20 PM
So would you chance it with the ocz 3000, it was said to be specifically tested for the KR7A-raid mobo. Or should i just stick with the PC2700. Sorry, i'm a newb at this stuff, what are you talking about far out of specs for the agp? I didn't get that part...
The agp bus runs at 1/2 the fsb speed at 133+mhz on the KR7A so at 180fsb the agp bus is at 90mhz vs. 66mhz at 133fsb.
I personally would not buy ocz 3000 as I tend to have bad luck with things that might be good and might be bad,I always seem to get the bad one.
From what I have seen the kingmax and twinmos 2700 will both do about just as well as a "good" stick of ocz 3000.
The twinmos a little better, the kingmax a little worse.
Silverstain
01-29-02, 10:34 PM
What about prices on them though? And where does crucial stack up?
They are about 85.00-100.00 depending what one and where you buy.
Look on pricewatch for 2700.
Crucial is good, most can get 1x256mb to 170+ on the kr7a.
It is only guaranteed to do 133mhz so if you get a stick that can only do 155mhz you can't complain to them.
Big_KiD
01-30-02, 12:30 AM
any thoughts on the mushkin hipo 2100
Most people don't use it due to the price vs. what it is rated at.
Not much user performance information on it.
CMangano
01-30-02, 11:10 AM
The soyo dragon plus is one of the few boards that have no voltage adjustment for the memory.
Crap. So what you are telling me is that if I want to up my FSB even higher, and my RAM is holding me back, I am stuck?
When I bought this board I didn't have overclocking in mind, so I didn't look into this stuff. What board would allow me to change the bus, CPU multiplier, RAM voltage and Video voltage in the bios?
Abit kr7a is the only board I know of that has all those settings and in the bios.
CMangano
01-30-02, 11:43 AM
Is that a good board? Also, does upping the voltage on the GPU and RAM help with overclocking? If I can't up the voltage, can I still get really good overclocking results?
Yes the kr7a is one of the best overclocking motherboards.
I have never had a need to mess with the gpu voltage, the memory voltage definatly can help with overclocking.
With out being able to raise the memory voltage you are really limiting yourself with overclocking.
Originally posted by Placid
From what I have seen the kingmax and twinmos 2700 will both do about just as well as a "good" stick of ocz 3000.
The twinmos a little better, the kingmax a little worse.
Placid- What fsb can I expect on a 8KHA+ with the KingMax PC2700? I don't seem to get much higher with it than with Crucial PC2100.
Harvey
ucfswimmer
01-30-02, 12:23 PM
if you get for example the soyo k7v dragon plus mobo with corsair 2700 DDR RAM, and you want to USB, hypothetically if your entire system is cooled and none of your other components are holding you back...without being able to up the vdimm, will you be able to achieve 166mhz FSB (ie will 2700 ram work at 166mhz fsb w/o needing to adjust the vdimm...is the vdimm only used to give more power to oc'ed ram sticks...or do you need to up it past 2.5 if you are going above 133 mhz fsb?)
gracias =)
~jeff~
Originally posted by hallen
Placid- What fsb can I expect on a 8KHA+ with the KingMax PC2700? I don't seem to get much higher with it than with Crucial PC2100.
Harvey
You should be able to get to 175mhz at least with one or two sticks.
Originally posted by ucfswimmer
if you get for example the soyo k7v dragon plus mobo with corsair 2700 DDR RAM, and you want to USB, hypothetically if your entire system is cooled and none of your other components are holding you back...without being able to up the vdimm, will you be able to achieve 166mhz FSB (ie will 2700 ram work at 166mhz fsb w/o needing to adjust the vdimm...is the vdimm only used to give more power to oc'ed ram sticks...or do you need to up it past 2.5 if you are going above 133 mhz fsb?)
gracias =)
~jeff~
2700 should be able to run stable at 166fsb 2.5v in theory.
In reality you probably will need 2.6v for it to be 100% stable and almost for sure 2.6v if using two sticks.
Here is a interesting thread on the corsair message boards.
http://www.houseofhelp.com/v2/showthread.php?threadid=5353
CMangano
01-30-02, 01:18 PM
Wow, thanks for the info Placid. I checked out the board on Abit and it looks like it will work just fine for what I need.
You told hallen that he could expect 175 FSB. I am assuming you mean with something other than standard cooling (water cooling, for example), right?
I am planning on building a water cooling system for my PC, and I was wondering what I can expect from my system. If I change to the Abit board, could I get 12.0 @175? That would be 2100MHZ for a 1700+, which would be pretty awesome. Is it even possible?
Originally posted by Placid
You should be able to get to 175mhz at least with one or two sticks.
Wow. That's great news. You made my day.
Thank you. Thank you. Thank you.
Harvey
Originally posted by CMangano
Wow, thanks for the info Placid. I checked out the board on Abit and it looks like it will work just fine for what I need.
You told hallen that he could expect 175 FSB. I am assuming you mean with something other than standard cooling (water cooling, for example), right?
I am planning on building a water cooling system for my PC, and I was wondering what I can expect from my system. If I change to the Abit board, could I get 12.0 @175? That would be 2100MHZ for a 1700+, which would be pretty awesome. Is it even possible?
Hallen was asking what the memory could do provided nothing else in the system was holding things back.
You can probably get around 1700-1800mhz from the xp1700 with air cooling, If you unlock the cpu so you can adjust the multiplier then you can use a lower multiplier and higher fsb.
175X10.
CMangano
01-30-02, 01:37 PM
What about with water cooling?
The system I will have will be:
AMD Athlon XP 1700+
Gainward GeForce3 Ti450 GS
Corsair or Crucial PC2400 DDR RAM
Abit KR7A Mobo
Home Built Water Cooling System
IBM 30GB 7200RPM Hard Drive in a Cooler
Plextor 16/10/40A CD-RW
SPI 400W Power Supply
Sound Blaster Live Value!
Any ideas what you think I can get with that?
No idea, ask in the amd cpu section or look in the cpu database.
someone talked about the volts of something on the number of sticks of ram, so what would be better one or two sticks, and is there any pc2700 in 512 sticks and if so are they very expensive?
For overclocking.
1 x256 is better than 2x256.
2x256 is better than 1x512.
Mushkin sells some 2700 512mb memory.
239.00
Originally posted by Placid
For overclocking.
1 x256 is better than 2x256.
2x256 is better than 1x512.
Mushkin sells some 2700 512mb memory.
239.00
wow thats a lot, but thankfully the 2x256 is what i was looking for :D
thanks for the response too
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