why overclock a 3ghz?

[james8t2]

i can see why someone would want to overclock like a 2.4c, but i see people wanting to over clock their 3ghz p4 and was wondering....is there anything out there that really requirees you to over clock a 3ghz p4? or is this just for bragging rights

 

[stevejst]

You have a power system, most of all you have a power motherboard that suppose to be able to run 300 FSB. You can easily overclock that beast you have to 3.4 GHz. It will cost you nothing, it won't endanger the well being of your PC and you will have better performance across the board.
So ... why wouldn't you overclock?

 

[Jeff7181]

The logic some people use is that with a 2.4C you'd have to run the FSB really high, and if your RAM isn't capable of running 250 Mhz you'll have to use a RAM divider, which cripples the CPU since P4's like memory bandwidth. However, if you can get at least another 100 Mhz out of it by using a RAM divider, the added CPU speed will probably outweigh the negative effect of running the RAM async from the bus. With the 2.4C, you'd have to run the FSB at 283 Mhz to get a 3.4 Ghz overclock.

With a 3.0C, which has a multiplier of 15, you'd only have to run the FSB at 226 to get 3.4 ghz, and it will most likely be faster than the 2.4C at 3.4 Ghz because it's not hard to find RAM that will run at 226 mhz to keep everything in sync.

Is it worth the added cost of buying a 3.0C over a 2.4C? Maybe... but that's more of a personal choice you make depending on how much money you have to spend.

Do you need a 3.4 Ghz processor? Probably not... but who complains about a computer that's too fast?

 

[stevejst]

The logic some people use is that with a 2.4C you'd have to run the FSB really high, and if your RAM isn't capable of running 250 Mhz you'll have to use a RAM divider, which cripples the CPU since P4's like memory bandwidth.

Cripples CPU?
And how is that?

 

[Jeff7181]

Remember the 533 Mhz bus CPU's? Increasing memory bandwidth created large performance gains. That means it was starved for memory bandwidth from the beginning... by using a RAM divider with the 800 mhz bus CPU's, you're introducing the same bottleneck the 533 Mhz bus single channel CPU's had. Although maybe not as severe with dual memory channels now, it is still a bottleneck.

 

[jose]

Because it's so easy. running a 3.06 @ 3.45 at default vcore. 34C, p4b533e w/ 512 khxpc3500

Regards,
Jose

 

[infinite012]

It's not too hard to find RAM that will run DDR500 nowadays. OCZ PC3500EL Gold (I think it's this one) will run PC4000 easily, however, if you wanted to go to, let's say, 300MHz FSB (1.2GHz quad-pumped), then you'd have to get some kickass RAM or use 5:4 divider. Jeff7181 already explained why ratios are bad, but they're even worse on nForce2 boards.

 

[Shimmishim]

Originally posted by: Jeff7181
Remember the 533 Mhz bus CPU's? Increasing memory bandwidth created large performance gains. That means it was starved for memory bandwidth from the beginning... by using a RAM divider with the 800 mhz bus CPU's, you're introducing the same bottleneck the 533 Mhz bus single channel CPU's had. Although maybe not as severe with dual memory channels now, it is still a bottleneck.

well... someone did benchies and found that the 5:4 doesn't cripple it THAT much

i am running 293 mhz fsb with the 5:4 divider putting my ram at 234 mhz

still faster than any amd setup out there even though i have to use a negative divider

i'd rather run 293 mhz fsb with a 5:4 divider and get 3.5 ghz than 250 mhz fsb at 1:1 and get 3.0 ghz

 

[stevejst]

Remember the 533 Mhz bus CPU's? Increasing memory bandwidth created large performance gains. That means it was starved for memory bandwidth from the beginning... by using a RAM divider with the 800 mhz bus CPU's, you're introducing the same bottleneck the 533 Mhz bus single channel CPU's had. Although maybe not as severe with dual memory channels now, it is still a bottleneck.

If you actually own Pentium instead of theory you could bench it and then you would know that 5:4 or 3:2 has no any "crippling" effect. As a matter of fact that kind of AMD "asynchronicity" does not apply on Pentium at all. You can easily have much better bandwidth with 5:4 than with 1:1, depending on the bus and timings.
And I know why, if you ask me nicely I might even tell you.

 

[batmang]

if i had a 3.0c, id be at 3.4 in a heartbeat, id go higher if i could. the point is, why not have a faster cpu free? too fast can never be bad. its always a good thing

 

[pspada]

why overclock a 3ghz?

I think a better question is why not?

 

[Jeff7181]

Originally posted by: stevejst

Remember the 533 Mhz bus CPU's? Increasing memory bandwidth created large performance gains. That means it was starved for memory bandwidth from the beginning... by using a RAM divider with the 800 mhz bus CPU's, you're introducing the same bottleneck the 533 Mhz bus single channel CPU's had. Although maybe not as severe with dual memory channels now, it is still a bottleneck.

If you actually own Pentium instead of theory you could bench it and then you would know that 5:4 or 3:2 has no any "crippling" effect. As a matter of fact that kind of AMD "asynchronicity" does not apply on Pentium at all. You can easily have much better bandwidth with 5:4 than with 1:1, depending on the bus and timings.
And I know why, if you ask me nicely I might even tell you.

It "has no any crippling effect" huh?

 

[stevejst]

It "has no any crippling effect" huh?

Exactly. You got it.

 

[Jeff7181]

steve, if you'd like to prove me wrong, fire up some benchmarking utilities and post the results when using RAM dividers.

 

[Icewind]

Its so easy, your stupid not too. Why not have that extra "oomph" for whatever your playing?

If anything else, yeah, for bragging rights. Were nerds, but by god were proud nerds


My main reason? OH, its a little something called Half Life 2......

 

[stevejst]

steve, if you'd like to prove me wrong, fire up some benchmarking utilities and post the results when using RAM dividers.

That would be teaching and I am not doing that for free. You can make some "independent" research on overclockers.com, they have a lot of forums there. You could also buy Northwood C and do it yourself.

 

[Jeff7181]

Originally posted by: stevejst

steve, if you'd like to prove me wrong, fire up some benchmarking utilities and post the results when using RAM dividers.

That would be teaching and I am not doing that for free. You can make some "independent" research on overclockers.com, they have a lot of forums there. You could also buy Northwood C and do it yourself.

So in short, you're full of sh!t and won't do it because you know I'm right.

 

[FluxCap]

Maybe PM instead of crapping on this thread?

 

[Jeff7181]

Originally posted by: FluxCap
Maybe PM instead of crapping on this thread?

If he had his PM's enabled I would, but for some reason, he doesn't want to be contacted... probably because he spews so much sh!t he'd hit his PM limit every day.

 

[FluxCap]

Yeah, that does make it tough /

 

[batmang]

Originally posted by: Icewind
Its so easy, your stupid not too. Why not have that extra "oomph" for whatever your playing?

If anything else, yeah, for bragging rights. Were nerds, but by god were proud nerds


My main reason? OH, its a little something called Half Life 2......

YEP, thats the only reason i upgraded, HALF-LIFE 2 ! HL2 makes Doom 3 look retarded.

 

[pspada]

But where's the dang HL2 demo?

 

[FluxCap]

Demo is going to be released after the game's release.
Benchmark utility for HL2 (which should still rock) will be out before the game is released

 

[Slammy1]

Well, unbuffered memory scores take a big hit on a divider, HD performance tends to decrease. I can show that from my notes I took while o/c'ing this guy. Thing is, it's all about CPU power in overall performance (gaming, anyways) so it's still better to run your CPU to max on a divider.

 

[pspada]

Originally posted by: FluxCap
Demo is going to be released after the game's release.
Benchmark utility for HL2 (which should still rock) will be out before the game is released

They can benchmark my flabby a$$ - I wanna play :brokenheart: