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Performance advantage running ram at 150+ ?

D

deras

Member
Okay I am clear on the fact that running Cas2 can have 2-5 percent performance advantage over running at Cas3...

I know DDR ram can have as much as an 8% performance advantage...

But what is the peformance difference between running ram at 133 and running it at 166 (or 133 vs 100)?
 
It's hard to say, but it should provide you with a nice performance boost, since you'll be running everything in your system at a faster speed, RAM, processor, PCI bus, AGP bus, etc... Just make sure your components can handle it.
 
Agreed. While a "system" may be able to run at 150~166 MHz without any PCI cards, it is those cards which are now becoming a bottleneck.
 
Don't ask such questions without telling us what you are using your computer for.

Are you die hard gamer or die hard internet surfer? 🙂

 
Taking BX as an example, where memory runs synchrously with the northbridge, the effect can be very obvious. To give you a general idea, a 550E@825 BX150 system will beat a regular 933 BX133 in Q3A.
 
The question is wether you can run both FSB and RAM at 150+. On my Asus A7V133 FSB above 135 does not work anymore, cause the northbridge can not take it(Via chipsets are bad ocers! imho). If I use asynchronous mode (FSB at 113, RAM at 150) the system has the same performance under Seti as running both at 133.
 
Just run your Sandra memory benchmark and the difference between RAM at 133MHz and 150MHz is quite large. Also in my humble opinion the difference between cas 3 and cas 2 is much greater than 2-5 percent, maybe that's overall system speed, but the RAM itself can see up to a 15% increase. If you are a heavy gamer than you want to get your RAM speed as fast as possible, it will definately increase your frame rates.

Oh, I forgot to mention 150MHz cas 2 RAM is faster than 266MHz DDR at stock speed according to Sandra.
 
Seti DOES depend on memory and RAM speed! Although it is clear, that a faster CPU performs better also the memory is important. In my case Seti took 30 min less for the same WU just by switching from PC100 to PC800 RDRAM (6.5h to 6h)
 
Sorry, my system is for multimedia production... video editing, encoding, music recording... etc...

looks like from this test - the difference between 133 and 150 on both ram and cpu is up to 4% http://amdmb.com/article-display.cfm?ArticleID=64&PageID=4

here is another good article on the performance difference between cas2 and cas3 http://www.tweakmax.com/html/cas/cas-1.cfm Looks to be also around 4-5%....

Unless there is a critical need (sometimes there is) I only like to pay more 50% more for something if I get 50% more product (whether that me measured in a bigger hard drive, or faster system performance, etc.) that is why I was trying to get an idea of what kind of improvement I would see but spending the extra money.

It seems price/performance-wise a faster CPU (at least if you have or are building a socket A AMD system) is a better investment.
 
dude, ram is cheap now.

u could get junky 256mb of ram for 75 bucks or whatever or you could get crucial that will run cas=2 up to like pc145 or infineon or mosel that will probably do pc150 or a little more, all for <100 bucks

I dont think that the better cpu u could get for 25 bucks is worth skimpin on the ram,

I just bought 256mb of infineon from bonkers325, that would be a better investment than Tbird 900 to Tbird 950 or whatever you are gonna get, especially when u are overclocking, when the stock speed doesnt matter quite as much, just if u get a good chip or not
 
Yeah, I would buy some overclocking-friendly RAM and set is high as your system will take. If you have equipment that will run stable at 150+MHz FSB then you should do that. For applications like encoding and multimedia production, you will definaitely experience a tangible benefit. You will not find a better time to buy RAM, and on a KT133a chipset, the performace of some overclocked PC133 will undoubtedly exceed standrard PC2100. Now, if you start overclocking the DDR, then that's a difefrent story. But so far, not too many people have been able to jack up their DDR speeds much.

-Aaron
 
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