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[Musho]

Working with the things we know, we can calculate how fast roughly the 8150 is compared to the 1100T in single threaded tests. Looking at Cinebench screenshot comparing the 1100T singlethreaded vs multithreaded, the difference is a 5,261261261 speedup, which is explained by the fact in the single threaded load the 1100T is running at 3,7ghz, while in the multithreaded test it's running at 3,3ghz. Those CPU Passmark benchmarks posted above are very well multithreaded so we'll assume it will show roughly the same scaling going from multithreaded to singlethreaded:

6314/5,261261261 = 1200 for the 1100T @ 3,7ghz

Now we know from movie posted about Bulldozer running Fritz Chess benchmark, that turbo in single threaded workloads can keep Bulldozer running at 4,2ghz with 1-2 cores loaded, while it runs at 3,6ghz with 8 cores loaded. Also, the cores are running at 80% efficiency when both cores in a single module are loaded, so instead of dividing by 8, we'll be dividing by:
8*0,8 = 6,4.
We also shouldn't forget the speed difference in multi and single threaded tests:
4,2/3,6 = 1,166666667

This brings Bulldozers calculated single thread score to:

8681/6,4*1,166666667 = 1582 for 8150 @ 4,2ghz

This gives Bulldozer a 1582/1200 = 1,319 or 31,9% speedup compared to thuban in single threaded workloads at stock speeds with turbo enabled for both.

OR

(1582/4,2)/(1200/3,7) = 1,162 or 16,2% IPC boost

Disclaimer: This is all just some theorycrafting, but it feels right about what to expect. Take these calculations with a grain of salt however

[Warwian]

Can anyone help me understand how the PassMark scores are calculated? For example: the i7 2600K looks to have a 1021 point advantage over the i7 2600. (http://www.cpubenchmark.net/high_end_cpus.html)
Isn't the only difference between the i7 2600K and the i7 2600 an unlocked multiplier and beefier IGP on the K-model? Does this affect the score somehow? Or do they include overclocked samples when calculating the score?

[slaveondope]

Can anyone help me understand how the PassMark scores are calculated? For example: the i7 2600K looks to have a 1021 point advantage over the i7 2600. (http://www.cpubenchmark.net/high_end_cpus.html)
Isn't the only difference between the i7 2600K and the i7 2600 an unlocked multiplier and beefier IGP on the K-model? Does this affect the score somehow? Or do they include overclocked samples when calculating the score?

Likely many/most of the 2600K submissions are overclocked hints the spread from 2600.

[Olivon]

Likely many/most of the 2600K submissions are overclocked hints the spread from 2600.

Overclocked CPU's got another page :

http://www.cpubenchmark.net/overclocked_cpus.html

[slaveondope]

Overclocked CPU's got another page :

http://www.cpubenchmark.net/overclocked_cpus.html

OK so they've separated them since my last look at Passmark. Any explanation why 2600K would perform better than a 2600 when both at stock?

[Olivon]

Maybe more weak platforms, H67, H61 with 1333 RAM, honestly, I don't know slaveondope

[FlanK3r]

Maybe more weak platforms, H67, H61 with 1333 RAM, honestly, I don't know slaveondope

no...its diferent between boards, if u used ASUS LGA1155 boards with auto setings, your turbo with 2600k (or 2500k etc) is in every moment at maximum boost (3800 MHz with 2600k)

[Musho]

Working with the things we know, we can calculate how fast roughly the 8150 is compared to the 1100T in single threaded tests. Looking at Cinebench screenshot comparing the 1100T singlethreaded vs multithreaded, the difference is a 5,261261261 speedup, which is explained by the fact in the single threaded load the 1100T is running at 3,7ghz, while in the multithreaded test it's running at 3,3ghz. Those CPU Passmark benchmarks posted above are very well multithreaded so we'll assume it will show roughly the same scaling going from multithreaded to singlethreaded:

6314/5,261261261 = 1200 for the 1100T @ 3,7ghz

Now we know from movie posted about Bulldozer running Fritz Chess benchmark, that turbo in single threaded workloads can keep Bulldozer running at 4,2ghz with 1-2 cores loaded, while it runs at 3,6ghz with 8 cores loaded. Also, the cores are running at 80% efficiency when both cores in a single module are loaded, so instead of dividing by 8, we'll be dividing by:
8*0,8 = 6,4.
We also shouldn't forget the speed difference in multi and single threaded tests:
4,2/3,6 = 1,166666667

This brings Bulldozers calculated single thread score to:

8681/6,4*1,166666667 = 1582 for 8150 @ 4,2ghz

This gives Bulldozer a 1582/1200 = 1,319 or 31,9% speedup compared to thuban in single threaded workloads at stock speeds with turbo enabled for both.

OR

(1582/4,2)/(1200/3,7) = 1,162 or 16,2% IPC boost

Disclaimer: This is all just some theorycrafting, but it feels right about what to expect. Take these calculations with a grain of salt however

Look at this: http://semiaccurate.com/forums/showp...postcount=2208
If this is true, I was _very_ close with my math skillz =)

[radaja]

Look at this: http://semiaccurate.com/forums/showp...postcount=2208
If this is true, I was _very_ close with my math skillz =)

isnt he saying that BD will get a 22.5%(-5%=17.5%=22.5%) performance increase
from a new Stepping and bios update,his friend says BD is -5% less IPC than thuban?
that would be one of the best stepping/bios improvements ever wouldnt it?