SB higher clocks offset IB/HW IPC increases?

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psyclist

Gawd
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Hey guys,

Not looking to start a war, but im really interested in this. Im wondering where the threshold is for the Clock speed advantage of Sandy vs. the increased IPC of IvyBridge and further on Haswell?

It seems with both of these two newer gen Processors, the OC headroom has been lowered and temps have gone up? (Damn cheap TIM) I know IPC has increased, and there are some fancy new instruction sets/features.

But really Im wondering if a SB at 4.8 vs IB at 4.6 vs HWL at 4.4 equal out for many tasks? Im trying to discern average clocks here, there are always going to be golden chips. What do you guys think, or has anyone ran across a review highlighting this?
 
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Well, it's pretty easy to calculate. IB has about a 6% IPC advantage over SB, and HWL has about a 7% IPC advantage over IB.

If you have a HWL clocked at 4.2GHz, then that's equivalent to an IB clocked at 4.5GHz. That translates to a SB clocked at 4.8GHz.
 
Average IPC equivalence :

HW = 108% IVB = 112% SB = 123% Nehalem

So :

4.4GHz HW = 4.75GHz IVB = 4.93GHz SB = 5.41GHz Nehalem
 
Yeah fair enough then, I guess the review sites wouldn't really post that kind of review up though. Im glad HWL is out, and things are moving forward, but it really is a disappointment in my eyes. Not enough of a leap, damn Intel and there focus on efficiency! I want a 5.5Ghz 8C/16T beast!
 
Correct math is this:

4.75
5.32224
6.5463552

Of course normal overclock for HW is 4.2 if user don't want to deal with atrocious temperatures, which is equivalent to 4.5 Ivy, which tends to be doable on latest revisions. Actually average improvement is 1.05 for HW, and 1.05 from Sandy to Ivy. If not for AVX2, and 6 SATA on chip, HW would be lackluster.
 
Raghar said:
Correct math is this:

4.75
5.32224
6.5463552
Of course normal overclock for HW is 4.2 if user don't want to deal with atrocious temperatures, which is equivalent to 4.5 Ivy, which tends to be doable on latest revisions. Actually average improvement is 1.05 for HW, and 1.05 from Sandy to Ivy. If not for AVX2, and 6 SATA on chip, HW would be lackluster.
Click to expand...


Yeah im not so sure thats correct math...
 
They're basically the same. If you read [H]'s review Haswell is about 12% faster in Cinebench. That means that Sandy has to be at 5 GHz to match Haswell at 4.5 GHz. Based on the average overclocks people are getting, I think the two processors are basically even. Same goes for Ivy.
 
Is there a good program to really test this? Cinibench the only one?
 
Let's not forget that the Haswell GPU is way faster than Sandy's. Also, the vector extensions and FMA extensions mean that, in a few years, software will run much faster on your Haswell CPU.

I'm not an Intel fanboy, but let's remember that it isn't always a straight-forward comparison.
 
Yeah, im not really concerned with GPU capabilities other than quicksync. Intel is getting there with crystalwell, but thats a whole other product lineup. Im concerned with the highend... In 3-5 years I will have jumped from my SB setup to something else anyways...I think intel has just changed focus and I also think its only gonna get worse from here on out until AMD or another competitor pushes them again. Im hoping 4k resolution standardizes quickly and forces the whole industry forward, because to me the performance side of the market is stagnating.
 
aphexcoil said:
Let's not forget that the Haswell GPU is way faster than Sandy's. Also, the vector extensions and FMA extensions mean that, in a few years, software will run much faster on your Haswell CPU.

I'm not an Intel fanboy, but let's remember that it isn't always a straight-forward comparison.
Click to expand...
True, but by the time those vector and FMA extensions start being used extensively there will of course be much faster processors out there. Someone with a Sandy Bridge could still wait till the next gen before considering an upgrade. Those that already have Haswell will no doubt get their money's worth in a couple years when those extensions are being used and they still have the chip.
 
psyclist said:
Hey guys,

Not looking to start a war, but im really interested in this. Im wondering where the threshold is for the Clock speed advantage of Sandy vs. the increased IPC of IvyBridge and further on Haswell?

It seems with both of these two newer gen Processors, the OC headroom has been lowered and temps have gone up? (Damn cheap TIM) I know IPC has increased, and there are some fancy new instruction sets/features.

But really Im wondering if a SB at 4.8 vs IB at 4.6 vs HWL at 4.4 equal out for many tasks? Im trying to discern average clocks here, there are always going to be golden chips. What do you guys think, or has anyone ran across a review highlighting this?
Click to expand...

had a sb at 4.6ghz now a haswell at same speed.
I am not likely to notice much difference, yea boot is faster thanks to motherboard and windows 8, and I might notice it on working applications, the 400mhz difference+ seems in the ballpark.
 
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