Would using the 5:4 with 2700ddr be...

[JediK]

Would using the 5:4 divider with a 2700ddr on 3ghz intel cause the cpu to starve for bandwidth? Or does it almost eliminate this problem because of using the 5:4 divider? I only have 2700ddr right now, and I don't want to upgrade. That would be too much $$$

Also, would running a 3ghz with 5:4 divider at 166mhz equal out to a 3112.5ghz? (I could be figuring this up the wrong way, lol)

I'm trying to figure out on what to upgrade to. I only want to upgrade my mobo & cpu at the moment. I would really like to have an intel 3.0c or so I can get the HT and have a faster setup than I currently have.

**Please don't flame me if I posted anything wrong. I am just trying to learn. Thanks.

BTW, why does the posts in the intel forum get smaller by the day? There isn't even a next page button.

 

[Stugots]

p4s need alot of memory bandwidth to fill the 20 and now 31 stage pipelines...

let me try to understand this now, you have a 3.06b running pc2700 ram at 5:4? pc2700 ram is really catered for amd 333fsb systems to run at 166fsb with the ram 1:1. if you want to go to a 3.0c youll need a new motherboard, i865 at least preferably an i875 board, and some pc3200 ram. that 3.06b of yours does have HT, your board just may not support it. also if you get a newer board for you existing cpu, you will gain HT and dual channel mode for your ram.

 

[JediK]

Uhh... did you look at my sig? I never once said I had a intel setup. I only used the word "would"...

I just wanted to know if it would starve the bandwith with this setting. I know about the motherboards, HT, and everything else, 3200ddr etc...

I was just wanting to know would there be a huge perfomance hit of using the 5:4 instead of the 1:1.

 

[Nitro16]

Using the 5:4 divider would run your RAM at 160MHz with an 800MHz FSB P4. The performance difference between 1:1 and 5:4 is generally around 4% at the same timings, so its nothing major. Assuming you were to get a i875 board then your performance would be just a shade off a standard i865PE board running 200MHz 1:1 (give or take 1-2%).

Looking at your sig I see you are running Crucial PC2700, which have been known to be quite good overclockers and can hold good timings. With a bit of voltage you may actually be able to get near to 200MHz with that RAM and give yourself a little more overclocking room. If that fails, there is still the 3:2 divider which would allow you to reach the top overclock for that chip, however the performance drop then would obviously be larger.

 

[ncantador]

Also, would running a 3ghz with 5:4 divider at 166mhz equal out to a 3112.5ghz? (I could be figuring this up the wrong way, lol)

Would that be an 533mhz or 800mhz chip?