Why does phenom perform better than an intel quad at high resolution in Lost Planet?

[JumpingJack]

also memory bandwidth plays a role.

Not as big a role as you would think.... I did AMD at DDR2-667, 800, 1066 and the runs varied by about 5-8 FPS.

The QX9650 actually lost 2 FPS at DDR2-1067

Jack

[Jakko]

Not as big a role as you would think.... I did AMD at DDR2-667, 800, 1066 and the runs varied by about 5-8 FPS.

The QX9650 actually lost 2 FPS at DDR2-1067

Jack

Thanks for that info, that makes it even stranger.
Basicly the only area in which the phenom had a distinct advantage was the mem BW...

I guess it could it even be the 790FX chipset vs the X48.
But then, they both offer PCIE *16, so that shouldn't matter.

[JumpingJack]

Thanks for that info, that makes it even stranger.
Basicly the only area in which the phenom had a distinct advantage was the mem BW...

I guess it could it even be the 790FX chipset vs the X48.
But then, they both offer PCIE *16, so that shouldn't matter.

More strangeness .... I re-ran a 1280x1024 run using an HTT multiplier to set the HTT link to 800 Mhz (that's down from 2000 Mhz):

Here is the data for both runs:

Phenom 9850 2.5 GHz 2.0 GHz NB 2.0 Ghz HTT and DDR2-1066


Phenom 9850 2.5 GHz 2.0 GHz NB 800 MHz HTT and DDR2-800


The data at 10280x1024 in the article is 2.5 GHz Core 2.0 GHz NB 2.0 GHz HTT and DDR2-800

Neither snow or cave show much of a huge difference, Snow gets about 8 FPS (EDIT at low 'CPU limited regime' resoluionts) and generally better with DDR2-1066 but the HTT at 800 has no effect.

jack

[SkullCracka]

More strangeness .... I re-ran a 1280x1024 run using an HTT multiplier to set the HTT link to 800 Mhz (that's down from 2000 Mhz):

Here is the data for both runs:

Phenom 9850 2.5 GHz 2.0 GHz NB 2.0 Ghz HTT and DDR2-1066


Phenom 9850 2.5 GHz 2.0 GHz NB 800 MHz HTT and DDR2-800


The data at 10280x1024 in the article is 2.5 GHz Core 2.0 GHz NB 2.0 GHz HTT and DDR2-800

Neither snow or cave show much of a huge difference, Snow gets about 8 FPS (EDIT at low 'CPU limited regime' resoluionts) and generally better with DDR2-1066 but the HTT at 800 has no effect.

jack

i have noticed that low ht and low nb doesnt make much difefrence either.
is it that the ondie ht,nb is such low latency that it is still just as fast as the memory and still has a gerater or equal bandwidth. not sure. but i did find it interesting.

in Tonys 1000mhz thread he mentioned this once. that he noticed the cpu take off and get better clocks with lower ht and nb. less heat probly in tony's case. but i dont know im just a dumb newb

[JumpingJack]

i have noticed that low ht and low nb doesnt make much difefrence either.
is it that the ondie ht,nb is such low latency that it is still just as fast as the memory and still has a gerater or equal bandwidth. not sure. but i did find it interesting.

in Tonys 1000mhz thread he mentioned this once. that he noticed the cpu take off and get better clocks with lower ht and nb. less heat probly in tony's case. but i dont know im just a dumb newb

Yeah, in terms of an OC I can understand this... but from a pure computational flow of 1' and 0', it is hard to figure out why Phenom supports higher FPS in a GPU bound mode... it is interesting nonetheless.

Of all the contemporary games out there Lost Planet is one of the 'neater' ones to fool around with from a bench perspective. Between LP and UT3, they do the best job of utilizing quads.

EDIT: PS -- I have only ever met one person in the enthusiast forums I would catagorize as 'dumb', you are not that person
Jack

[Jakko]

Ok, it's either the phenom or the 790FX.


The snow benchmarks at resolutions around 1600*1200 are mostly gpu limited right?
So this means it shouldn't matter much, going from a phenom 2.5 Ghz, to a dual core K8 at say 3.2 Ghz.
If the AMD system then still benches higher than the intel quad core system, it has to be a chipset > GPU connection thing, giving the AMD setup the advantage.

If this test scores lower than the intel system, it has to be a phenom architecture thing.

[JumpingJack]

Ok, it's either the phenom or the 790FX.


The snow benchmarks at resolutions around 1600*1200 are mostly gpu limited right?
So this means it shouldn't matter much, going from a phenom 2.5 Ghz, to a dual core K8 at say 3.2 Ghz.
If the AMD system then still benches higher than the intel quad core system, it has to be a chipset > GPU connection thing, giving the AMD setup the advantage.

If this test scores lower than the intel system, it has to be a phenom architecture thing.

That is reasonable....