[revlimiter]

Just wondering how these CPUs perform against one another. I have heard the 2500K can overclock to 5GHz. I'd be lucky if I can get 4GHz out of my Q8400. But is it a really noticeable difference in speeds?

Thanks,

 

[Ocnewb]

Yes i can say that you will definitely notice the differences in speed.

 

[Greensystemsgo]

absolutly. Simply measuring in ghz doesnt mean anything.

an OK indicator is super pi times.

http://www.overclock.net/benchmarking-software-discussion/55790-official-superpi-1m-top-times.html

 

[whitey_rolls]

clock for clock the 2500K is faster than the Q8400 and yes you are right you can overclock the CPU higher (likely not to 5.0ghz unless you are really lucky)....

But depending on what you are using the PC for the Q8400 is still a really great chip, might not be worth upgrading until Ivybridge is released later this year.

 

[TickleMeElmo]

Clock for clock Sandy Bridge is 10-15% faster than Nehalem. Clock for clock Nehalem is 10-15% faster than Core 2.

Therefore, even at the same clocks you will get 20-30% faster performance.

 

[Chickenman]

Here is a work in progress
https://spreadsheets.google.com/ccc?key=0Aoxai_uowRlXdFNWNVRvM1hKcG9HMlpzdDhiTEw4NkE&hl=en&authkey=COalx1A

my quad is only a G0 q6600 but you can see that it's a huge jump to sandy bridge, some HT off results there too.

Too lazy to finish lol

 

[Eggy88]

No point in going 2500k if your not going to upgrade your gpu, that 9800GTX will bottleneck the 2500 even OC'ed.

 

[turrican9]

Some people say that even lower end graphics cards like 9800GTX will gain from a Sandy. Frames are more constant and does not dip as much in games. Giving a better gaming experience...

 

[cyronn]

Quote:

Originally Posted by Eggy88;13148535
No point in going 2500k if your not going to upgrade your gpu, that 9800GTX will bottleneck the 2500 even OC'ed.

eh ? please explain that one to me.

edit: op be lucky to get 4ghz out his old cpu tbh

 

[Eggy88]

4Ghz out of an Q8400 would be very lucky yes, i was having a hard time pushing 3.8Ghz on my MIIF.

I had a HD4890 with my old Q8400, and even with that card i saw a bottleneck on the card, the 9800GTX is slower then the hd4890. The card would always run 99-100% while the cpu was 20-25% range. Even in BC2 i never saw more than 60% cpu load, and that is a heavy cpu game.

As i would see it you will most likely not notice any major fps boost in games (maybe a bit in BC2, SC2 etc) but it all depends what you use the comp for...

Just my 2 cents.

 

[turrican9]

Quote:

Originally Posted by Eggy88;13160145
4Ghz out of an Q8400 would be very lucky yes, i was having a hard time pushing 3.8Ghz on my MIIF.

I had a HD4890 with my old Q8400, and even with that card i saw a bottleneck on the card, the 9800GTX is slower then the hd4890. The card would always run 99-100% while the cpu was 20-25% range. Even in BC2 i never saw more than 60% cpu load, and that is a heavy cpu game.

As i would see it you will most likely not notice any major fps boost in games (maybe a bit in BC2, SC2 etc) but it all depends what you use the comp for...

Just my 2 cents.

If CPU was at 60% load and GPU at 99-100% load, CPU was not the bottleneck, but the GPU.

Edit: You wrote 'the card'. So you probably meant GPU was the bottleneck

 

[Jesse^_^]

Nvm

 

[Eggy88]

Quote:

Originally Posted by turrican9 If CPU was at 60% load and GPU at 99-100% load, CPU was not the bottleneck, but the GPU.

That was what i said, was it not?

Quote:

Originally Posted by Eggy88 and even with that card i saw a bottleneck on the card, the 9800GTX is slower then the hd4890.

(Kanskje vi skal ta det på norsk)?? hehe

With Q8400 and Hd4890 the bottleneck was the HD4890, and since the 4890 is more powerful than 9800GTX, and 2500k is another league vs Q8400, the 9800GTX would bottleneck the 2500k even more.

 

[turrican9]

Quote:

Originally Posted by Eggy88 That was what i said, was it not? With Q8400 and Hd4890 the bottleneck was the HD4890, and since the 4890 is more powerful than 9800GTX, and 2500k is another league vs Q8400, the 9800GTX would bottleneck the 2500k even more.

Yes, I missread the first time. My fault.