Overclock.net › Forums › Benchmarks › Overclock.net HWBot Team › Has anyone ever noticed this?
New Posts  All Forums:Forum Nav:

Has anyone ever noticed this?

post #1 of 15
Thread Starter 
So I was browsing benchmarks on HWBot and I noticed something interesting... its quite a bit to read but it seems interesting to me. Maybe I am just overthinking this but it has me wondering... and if memory serves me correct back in elementary school we learned that there is no such thing as a dumb question.

There seems to be a pattern with both AMD and Intel CPU's in the Pi calculation programs (SuperPi and wPrime) that sets the results into 1 or 2 distinct groupings on the charts. Now of course there are also random miscellaneous outliers like there always will be with a large quantity of data collection but what I am trying to figure out is why this happens.

There is probably a good explanation for this, but anything I can come up with is just a guess. I was considering stuff like:
  • Different revisions of the chips like the ES vs. retail chips.
  • Different Steppings
  • Architecture changes
  • Hyper-threading (for Intel results)

This is what I mean:

Intel CPU's



AMD CPU's



AMD CPU's seems to have more "normal" single grouping results in SuperPi 1M and 32M tests but have the groupings in wPrime, while Intel has slight groupings in SuperPi and very distinct groupings in wPrime.

You can see here in Intel's wPrime 1024M chart that there is a large variation...



So at about 5800MHz there is as much as a 50 second difference between the CPU's in the top cluster and bottom cluster. This is also the spot at which the top cluster can't clock any higher, while the bottom cluster continues on past 6.5GHz. Which leads me to believe the bottom cluster contains better clocking chips that also give better performance.

But then you look at the SuperPi results for the Intel CPU's and it is the opposite:



So in SuperPi now the lower grouping, which is the one with the faster times, stops clocking around the same 5800MHz frequency and it is the upper group that continues forward and then surpassing the lower grouping in times but it does take more speed for them to equal the fastest CPU in the lower group. In fact the upper group of CPU's don't match that speed until about 6500MHz. I am guessing it has something to do with the fact that this is a single threaded benchmark rather than multi-threaded but that still doesn't explain why the results still are somewhat separated into multiple clusters. If it is all about single thread performance than it should follow one curve because when measuring the performance of a single thread the only thing that should improve the benchmark speed is the core frequency right?

So can anyone explain to me what is causing these clusters on these charts? And why Intel has multiple clusters on benchmarks where AMD only has one discernible group?
Edited by Semper Fidelis - 2/28/11 at 4:48am
post #2 of 15
The only thing that makes sense to me is the operating system.

Windows 7 does better with high frequencies than XP does, though XP is usually more efficient.

The large differences for WPrime is definitely the OS. While I might get 3 seconds and 5.4GHz in XP, in W7 that would be like 4.5 seconds.
Bench Stuffs
(32 items)
 
ITX Daily Driver
(11 items)
 
For Sale: 6GHz+ 980X
$225 (USD) or best offer
CPUCPUCPUCPU
Intel Core i7 920 Intel Xeon W3520 Intel Core i7 4770K Intel Core 2 Duo E8500 
CPUCPUCPUCPU
Intel Pentium G3258 Intel QX9650 AMD FX 4300 Intel E2140 
CPUMotherboardGraphicsGraphics
E4300 Asus Rampage Extreme / P5E3 Deluxe / Gigabyte X... MSI GTX 275 Lightning MSI HD 7970 Lightning 
GraphicsGraphicsGraphicsGraphics
Asus GTX 285 Matrix Platinum MSI HD 5870 Lightning EVGA GTX 980 TI Classified K|ngp|n Edition MSI GTX 580 Lightning 
RAMRAMRAMRAM
Corsair Dominator Platinum 2666 10-12-12 Samsung Corsair Dominator GT 2000 7-8-7 Hypers Kingston HyperX 2000 9-9-9 BBSE G.Skill Trident 2000 9-9-9 PSC 
Hard DriveHard DriveHard DriveCooling
Kingston SSD Now! 128GB Patriot Torqx 2 32GB Seagate 80GB XPSC Rasa + EK VGA + HWLabs Black Ice GTX 360 +... 
OSOSOSKeyboard
W7 Pro x64 SP1 Windows XP x86 SP3 W8.1 Ducky Shine 3, Cherry Brown Switches 
PowerCaseMouseMouse Pad
Corsair AX1200 Dimastech Easy V2.5! <3 Logitech G5 Battlefield 2142 Edition Puretrak Stealth 
  hide details  
Reply
Bench Stuffs
(32 items)
 
ITX Daily Driver
(11 items)
 
For Sale: 6GHz+ 980X
$225 (USD) or best offer
CPUCPUCPUCPU
Intel Core i7 920 Intel Xeon W3520 Intel Core i7 4770K Intel Core 2 Duo E8500 
CPUCPUCPUCPU
Intel Pentium G3258 Intel QX9650 AMD FX 4300 Intel E2140 
CPUMotherboardGraphicsGraphics
E4300 Asus Rampage Extreme / P5E3 Deluxe / Gigabyte X... MSI GTX 275 Lightning MSI HD 7970 Lightning 
GraphicsGraphicsGraphicsGraphics
Asus GTX 285 Matrix Platinum MSI HD 5870 Lightning EVGA GTX 980 TI Classified K|ngp|n Edition MSI GTX 580 Lightning 
RAMRAMRAMRAM
Corsair Dominator Platinum 2666 10-12-12 Samsung Corsair Dominator GT 2000 7-8-7 Hypers Kingston HyperX 2000 9-9-9 BBSE G.Skill Trident 2000 9-9-9 PSC 
Hard DriveHard DriveHard DriveCooling
Kingston SSD Now! 128GB Patriot Torqx 2 32GB Seagate 80GB XPSC Rasa + EK VGA + HWLabs Black Ice GTX 360 +... 
OSOSOSKeyboard
W7 Pro x64 SP1 Windows XP x86 SP3 W8.1 Ducky Shine 3, Cherry Brown Switches 
PowerCaseMouseMouse Pad
Corsair AX1200 Dimastech Easy V2.5! <3 Logitech G5 Battlefield 2142 Edition Puretrak Stealth 
  hide details  
Reply
post #3 of 15
Thread Starter 
Quote:
Originally Posted by xxbassplayerxx View Post
The only thing that makes sense to me is the operating system.

Windows 7 does better with high frequencies than XP does, though XP is usually more efficient.

The large differences for WPrime is definitely the OS. While I might get 3 seconds and 5.4GHz in XP, in W7 that would be like 4.5 seconds.
Ah yeah I didn't even think about the OS... but still when I look at the overall charts AMD CPU's are in one cluster for the SuperPi results while Intel have somewhat 2 separate clusters. And now that I look back on it, it seems the AMD wPrime results seem to follow 3-4 different clusters while the Intel have 2.
post #4 of 15
VERY simple answer for wprime....HT on i7's vs Core 2 quads/duos

for Pi its probably the same, but due to the newer chips being more efficient than the older core 2's. so an i5 at the same clock as an E8600 would be faster, there fore contributing to the two lines.

all the graphs show is just old vs new chips in pi and wprime. simple!

EDIT: seems like the top lines are usually dual cores & bottom are 4-6 on wprime.
The 775 Legend
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8600 @ 5.8 -- 1.736v Rampage Formula! GTX550ti Vmod! OCZ D9's @ 1200+ cas 5 
OSMonitorPowerCase
XPEEEEEEEEEEEEEEEEEEEEEEE XGA 800x600 TR2-RX 850W Neoprene sheet 
  hide details  
Reply
The 775 Legend
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8600 @ 5.8 -- 1.736v Rampage Formula! GTX550ti Vmod! OCZ D9's @ 1200+ cas 5 
OSMonitorPowerCase
XPEEEEEEEEEEEEEEEEEEEEEEE XGA 800x600 TR2-RX 850W Neoprene sheet 
  hide details  
Reply
post #5 of 15
Thread Starter 
Quote:
Originally Posted by wumpus View Post
VERY simple answer for wprime....HT on i7's vs Core 2 quads/duos

for Pi its probably the same, but due to the newer chips being more efficient than the older core 2's. so an i5 at the same clock as an E8600 would be faster, there fore contributing to the two lines.

all the graphs show is just old vs new chips in pi and wprime. simple!

EDIT: seems like the top lines are usually dual cores & bottom are 4-6 on wprime.
Well if dual cores were the top line... what's the deal with their data just suddenly stopping at ~5800MHz? I thought dual cores were supposed to overclock better than quad and hexa core CPU's.
post #6 of 15
The lower, more efficient line is Sandy Bridge. The highest for 32M is right around 5.8GHz and they're scoring significantly better at the same clocks.
Bench Stuffs
(32 items)
 
ITX Daily Driver
(11 items)
 
For Sale: 6GHz+ 980X
$225 (USD) or best offer
CPUCPUCPUCPU
Intel Core i7 920 Intel Xeon W3520 Intel Core i7 4770K Intel Core 2 Duo E8500 
CPUCPUCPUCPU
Intel Pentium G3258 Intel QX9650 AMD FX 4300 Intel E2140 
CPUMotherboardGraphicsGraphics
E4300 Asus Rampage Extreme / P5E3 Deluxe / Gigabyte X... MSI GTX 275 Lightning MSI HD 7970 Lightning 
GraphicsGraphicsGraphicsGraphics
Asus GTX 285 Matrix Platinum MSI HD 5870 Lightning EVGA GTX 980 TI Classified K|ngp|n Edition MSI GTX 580 Lightning 
RAMRAMRAMRAM
Corsair Dominator Platinum 2666 10-12-12 Samsung Corsair Dominator GT 2000 7-8-7 Hypers Kingston HyperX 2000 9-9-9 BBSE G.Skill Trident 2000 9-9-9 PSC 
Hard DriveHard DriveHard DriveCooling
Kingston SSD Now! 128GB Patriot Torqx 2 32GB Seagate 80GB XPSC Rasa + EK VGA + HWLabs Black Ice GTX 360 +... 
OSOSOSKeyboard
W7 Pro x64 SP1 Windows XP x86 SP3 W8.1 Ducky Shine 3, Cherry Brown Switches 
PowerCaseMouseMouse Pad
Corsair AX1200 Dimastech Easy V2.5! <3 Logitech G5 Battlefield 2142 Edition Puretrak Stealth 
  hide details  
Reply
Bench Stuffs
(32 items)
 
ITX Daily Driver
(11 items)
 
For Sale: 6GHz+ 980X
$225 (USD) or best offer
CPUCPUCPUCPU
Intel Core i7 920 Intel Xeon W3520 Intel Core i7 4770K Intel Core 2 Duo E8500 
CPUCPUCPUCPU
Intel Pentium G3258 Intel QX9650 AMD FX 4300 Intel E2140 
CPUMotherboardGraphicsGraphics
E4300 Asus Rampage Extreme / P5E3 Deluxe / Gigabyte X... MSI GTX 275 Lightning MSI HD 7970 Lightning 
GraphicsGraphicsGraphicsGraphics
Asus GTX 285 Matrix Platinum MSI HD 5870 Lightning EVGA GTX 980 TI Classified K|ngp|n Edition MSI GTX 580 Lightning 
RAMRAMRAMRAM
Corsair Dominator Platinum 2666 10-12-12 Samsung Corsair Dominator GT 2000 7-8-7 Hypers Kingston HyperX 2000 9-9-9 BBSE G.Skill Trident 2000 9-9-9 PSC 
Hard DriveHard DriveHard DriveCooling
Kingston SSD Now! 128GB Patriot Torqx 2 32GB Seagate 80GB XPSC Rasa + EK VGA + HWLabs Black Ice GTX 360 +... 
OSOSOSKeyboard
W7 Pro x64 SP1 Windows XP x86 SP3 W8.1 Ducky Shine 3, Cherry Brown Switches 
PowerCaseMouseMouse Pad
Corsair AX1200 Dimastech Easy V2.5! <3 Logitech G5 Battlefield 2142 Edition Puretrak Stealth 
  hide details  
Reply
post #7 of 15
Quote:
Originally Posted by xxbassplayerxx View Post
The lower, more efficient line is Sandy Bridge. The highest for 32M is right around 5.8GHz and they're scoring significantly better at the same clocks.
Makes sense, the coldbug is preventing the SB from clocking any higher than the i5 lineup. It doesn't make sense that SB would be so much slower at WPrime though, unless the bottom graph line is higher core count?
Edited by RonindeBeatrice - 3/4/11 at 8:02am
    
CPUMotherboardGraphicsRAM
Xeon E5645 Asus Rampage II Gene eVGA GTX460 SSC 3x4GB Corsair Dominator PC3-12800 
Hard DriveHard DriveHard DriveOS
Crucial C300 64GB Seagate Momentus XT 750 Western Digital GP 2TB EARS Windows 7 Premium 
MonitorKeyboardPowerCase
Asus VE278Q DSI SMK-88 Seasonic X-660 Lian Li U6B 2011 SE 
MouseMouse Pad
Logitech G500 KAI.g3 HIEN - HARD 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Xeon E5645 Asus Rampage II Gene eVGA GTX460 SSC 3x4GB Corsair Dominator PC3-12800 
Hard DriveHard DriveHard DriveOS
Crucial C300 64GB Seagate Momentus XT 750 Western Digital GP 2TB EARS Windows 7 Premium 
MonitorKeyboardPowerCase
Asus VE278Q DSI SMK-88 Seasonic X-660 Lian Li U6B 2011 SE 
MouseMouse Pad
Logitech G500 KAI.g3 HIEN - HARD 
  hide details  
Reply
post #8 of 15
i7's with HT are classified as 4-cores as are i5's C2Q's without HT. The lower line is the chips with 8 theoretical cores (threads) are significantly faster.
Bench Stuffs
(32 items)
 
ITX Daily Driver
(11 items)
 
For Sale: 6GHz+ 980X
$225 (USD) or best offer
CPUCPUCPUCPU
Intel Core i7 920 Intel Xeon W3520 Intel Core i7 4770K Intel Core 2 Duo E8500 
CPUCPUCPUCPU
Intel Pentium G3258 Intel QX9650 AMD FX 4300 Intel E2140 
CPUMotherboardGraphicsGraphics
E4300 Asus Rampage Extreme / P5E3 Deluxe / Gigabyte X... MSI GTX 275 Lightning MSI HD 7970 Lightning 
GraphicsGraphicsGraphicsGraphics
Asus GTX 285 Matrix Platinum MSI HD 5870 Lightning EVGA GTX 980 TI Classified K|ngp|n Edition MSI GTX 580 Lightning 
RAMRAMRAMRAM
Corsair Dominator Platinum 2666 10-12-12 Samsung Corsair Dominator GT 2000 7-8-7 Hypers Kingston HyperX 2000 9-9-9 BBSE G.Skill Trident 2000 9-9-9 PSC 
Hard DriveHard DriveHard DriveCooling
Kingston SSD Now! 128GB Patriot Torqx 2 32GB Seagate 80GB XPSC Rasa + EK VGA + HWLabs Black Ice GTX 360 +... 
OSOSOSKeyboard
W7 Pro x64 SP1 Windows XP x86 SP3 W8.1 Ducky Shine 3, Cherry Brown Switches 
PowerCaseMouseMouse Pad
Corsair AX1200 Dimastech Easy V2.5! <3 Logitech G5 Battlefield 2142 Edition Puretrak Stealth 
  hide details  
Reply
Bench Stuffs
(32 items)
 
ITX Daily Driver
(11 items)
 
For Sale: 6GHz+ 980X
$225 (USD) or best offer
CPUCPUCPUCPU
Intel Core i7 920 Intel Xeon W3520 Intel Core i7 4770K Intel Core 2 Duo E8500 
CPUCPUCPUCPU
Intel Pentium G3258 Intel QX9650 AMD FX 4300 Intel E2140 
CPUMotherboardGraphicsGraphics
E4300 Asus Rampage Extreme / P5E3 Deluxe / Gigabyte X... MSI GTX 275 Lightning MSI HD 7970 Lightning 
GraphicsGraphicsGraphicsGraphics
Asus GTX 285 Matrix Platinum MSI HD 5870 Lightning EVGA GTX 980 TI Classified K|ngp|n Edition MSI GTX 580 Lightning 
RAMRAMRAMRAM
Corsair Dominator Platinum 2666 10-12-12 Samsung Corsair Dominator GT 2000 7-8-7 Hypers Kingston HyperX 2000 9-9-9 BBSE G.Skill Trident 2000 9-9-9 PSC 
Hard DriveHard DriveHard DriveCooling
Kingston SSD Now! 128GB Patriot Torqx 2 32GB Seagate 80GB XPSC Rasa + EK VGA + HWLabs Black Ice GTX 360 +... 
OSOSOSKeyboard
W7 Pro x64 SP1 Windows XP x86 SP3 W8.1 Ducky Shine 3, Cherry Brown Switches 
PowerCaseMouseMouse Pad
Corsair AX1200 Dimastech Easy V2.5! <3 Logitech G5 Battlefield 2142 Edition Puretrak Stealth 
  hide details  
Reply
post #9 of 15
Quote:
Originally Posted by xxbassplayerxx View Post
i7's with HT are classified as 4-cores as are i5's C2Q's without HT. The lower line is the chips with 8 theoretical cores (threads) are significantly faster.
That's interesting, so what is being graphed exactly? Core i7 2600k's, i7's, i5's?
    
CPUMotherboardGraphicsRAM
Xeon E5645 Asus Rampage II Gene eVGA GTX460 SSC 3x4GB Corsair Dominator PC3-12800 
Hard DriveHard DriveHard DriveOS
Crucial C300 64GB Seagate Momentus XT 750 Western Digital GP 2TB EARS Windows 7 Premium 
MonitorKeyboardPowerCase
Asus VE278Q DSI SMK-88 Seasonic X-660 Lian Li U6B 2011 SE 
MouseMouse Pad
Logitech G500 KAI.g3 HIEN - HARD 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Xeon E5645 Asus Rampage II Gene eVGA GTX460 SSC 3x4GB Corsair Dominator PC3-12800 
Hard DriveHard DriveHard DriveOS
Crucial C300 64GB Seagate Momentus XT 750 Western Digital GP 2TB EARS Windows 7 Premium 
MonitorKeyboardPowerCase
Asus VE278Q DSI SMK-88 Seasonic X-660 Lian Li U6B 2011 SE 
MouseMouse Pad
Logitech G500 KAI.g3 HIEN - HARD 
  hide details  
Reply
post #10 of 15
Looking back at it, the lower tier is the hexacores for sure. 6.5GHz and ~75s is the WR.
Bench Stuffs
(32 items)
 
ITX Daily Driver
(11 items)
 
For Sale: 6GHz+ 980X
$225 (USD) or best offer
CPUCPUCPUCPU
Intel Core i7 920 Intel Xeon W3520 Intel Core i7 4770K Intel Core 2 Duo E8500 
CPUCPUCPUCPU
Intel Pentium G3258 Intel QX9650 AMD FX 4300 Intel E2140 
CPUMotherboardGraphicsGraphics
E4300 Asus Rampage Extreme / P5E3 Deluxe / Gigabyte X... MSI GTX 275 Lightning MSI HD 7970 Lightning 
GraphicsGraphicsGraphicsGraphics
Asus GTX 285 Matrix Platinum MSI HD 5870 Lightning EVGA GTX 980 TI Classified K|ngp|n Edition MSI GTX 580 Lightning 
RAMRAMRAMRAM
Corsair Dominator Platinum 2666 10-12-12 Samsung Corsair Dominator GT 2000 7-8-7 Hypers Kingston HyperX 2000 9-9-9 BBSE G.Skill Trident 2000 9-9-9 PSC 
Hard DriveHard DriveHard DriveCooling
Kingston SSD Now! 128GB Patriot Torqx 2 32GB Seagate 80GB XPSC Rasa + EK VGA + HWLabs Black Ice GTX 360 +... 
OSOSOSKeyboard
W7 Pro x64 SP1 Windows XP x86 SP3 W8.1 Ducky Shine 3, Cherry Brown Switches 
PowerCaseMouseMouse Pad
Corsair AX1200 Dimastech Easy V2.5! <3 Logitech G5 Battlefield 2142 Edition Puretrak Stealth 
  hide details  
Reply
Bench Stuffs
(32 items)
 
ITX Daily Driver
(11 items)
 
For Sale: 6GHz+ 980X
$225 (USD) or best offer
CPUCPUCPUCPU
Intel Core i7 920 Intel Xeon W3520 Intel Core i7 4770K Intel Core 2 Duo E8500 
CPUCPUCPUCPU
Intel Pentium G3258 Intel QX9650 AMD FX 4300 Intel E2140 
CPUMotherboardGraphicsGraphics
E4300 Asus Rampage Extreme / P5E3 Deluxe / Gigabyte X... MSI GTX 275 Lightning MSI HD 7970 Lightning 
GraphicsGraphicsGraphicsGraphics
Asus GTX 285 Matrix Platinum MSI HD 5870 Lightning EVGA GTX 980 TI Classified K|ngp|n Edition MSI GTX 580 Lightning 
RAMRAMRAMRAM
Corsair Dominator Platinum 2666 10-12-12 Samsung Corsair Dominator GT 2000 7-8-7 Hypers Kingston HyperX 2000 9-9-9 BBSE G.Skill Trident 2000 9-9-9 PSC 
Hard DriveHard DriveHard DriveCooling
Kingston SSD Now! 128GB Patriot Torqx 2 32GB Seagate 80GB XPSC Rasa + EK VGA + HWLabs Black Ice GTX 360 +... 
OSOSOSKeyboard
W7 Pro x64 SP1 Windows XP x86 SP3 W8.1 Ducky Shine 3, Cherry Brown Switches 
PowerCaseMouseMouse Pad
Corsair AX1200 Dimastech Easy V2.5! <3 Logitech G5 Battlefield 2142 Edition Puretrak Stealth 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Overclock.net HWBot Team
Overclock.net › Forums › Benchmarks › Overclock.net HWBot Team › Has anyone ever noticed this?