FSB and heat

Finally pulled my head out of my bum and figured out a bunch more about OC'ing in general. I am running kinda slow memory (PC2100) and felt like I was topped out @ about 140mhz FSB .
After a lot of archive searching and reading, I finally figured out how to use the FSB/RAM ratio thing in the BIOS and how to run the FSB past the RAM speed. My RAM would not go past about 280Mhz, so that was as fast as I was running my FSB.
NOW... I am running 220X10.5 for 2310, running the RAM at 5/3 (264Mhz).
Finally, to the question... given the same final clock speed, lets say 2100, will the chip run at the same temp using 140x15 as it will using 210x10? Basically does FSB raise heat or it it just overall clock speed (Vcore being the same)

Thanks for the input.
Brian

As a follow up question, what are the benefits of running the sys at a certain speed using a high FSB and lower multi rather than the other way around? Take into consideration the use of the FSB/RAM ratio to keep the ram at a lower speed. I know that faster RAM would be better, but I am working with what I have for the moment. If the RAM is always going to run at its max of 280mhz, does a higher FSB really matter?
Thanks again.
Brian

1. Go with 100% at 140-something FSB instead of a certain percentage of higher FSB because of the bottlenecks that are going to show up in real life after you're finished with benchmarking.

Once again, we went through this:
http://forum.oc-forums.com/vb/showthread.php?s=&threadid=215500&perpage=50&pagenumber=2

2. 100% in sync highest attainable FSB is better than lower FSB x higher multiplier. Here are some of the reasons why:
http://forum.oc-forums.com/vb/showthread.php?s=&threadid=176698

3. Yes higher FSB is going to produce more heat. Why? To put it simply, what-shell-we-call-its move faster on a molecular level and heat is being generated.

_____________________
2100+ AIUHB 0248 MPMW
256MB Crucial PC2100 + 2x 256MB Kingston (Hynix chip) PC2100 @ 6 3 3 2
[152] FSB x 15 = 2280 MHz @ 1.8 Vcore with memory frequency at 100% [152] @ 2.77 Vdimm
37(min) C to 46(max) C Winter ; 42(min) C to 50(max) C Summer
Epox 8RDA+
Thermalright SK-7 with variable speed 80x25mm YS-Tech FD1281259B-2F
BFG GeForce4 Ti4200 8X 128MB; Antec SX-835II case ; 350W Antec SmartPower SL350

Thanks for the links above. In response, I have persued the FSB a little harder and have managed to get a stable 165 out of my PC2100 RAM, with higher voltage and looser timings. I am happy with that for the moment, and am currently running 165x13.5 (2227).
Thanks for the input.
Brian

165 FSB on a PC2100 100% insync??

This is a rare mislabeled stick indeed.

PC2100s give out at 150s FSB. If they do not, they usually go above 166 because they're mislabeled PC2700 sticks, I think. Are you sure you're Prime95 Torture Test passing at 165 FSB?

Barnstormer said:

Thanks for the links above. In response, I have persued the FSB a little harder and have managed to get a stable 165 out of my PC2100 RAM, with higher voltage and looser timings. I am happy with that for the moment, and am currently running 165x13.5 (2227).
Thanks for the input.
Brian

Click to expand...

2-2-2-7? Yikes! Probably is a relabled PC2700 stick of some sort. Increasing the FSB increases heat, but by such a small amount that you needn't worry about it. Either at 10*200 or 20*100 at the same core voltage, the processor will dissipate the same amount of heat. Sure, the memory might put out a fraction of a watt more, but this is completely negligible.