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Multi-tasking inconsistencies among Quad-Core CPUs(WinRAR + CineBench)

post #1 of 5
Thread Starter 
Hello,
According to these tests, both 2600K & 3770K are better multi-tasking cpus than either AMD FX-8350(3:14) and Intel Core i7-4790K(3:08), but also Xeon E3-1231 v3 Intel(3:13), Intel Core i7-6700K(3:10), among all the rest, except:
  • Intel Core i7-5930K @1:56,
  • Intel Core i7-5820K @1:58,
  • Intel Core i5-5675C @2:46.
*Supposing that the interval to multi-tasking completion would reflect general cpu responsiveness while game streaming.
Note: I'm quoting the review out of context, here. While cinebench and winrar results are congruous, latency results are worse is my point.
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The Machine
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Nexus 7 2013
(11 items)
 
 
CPUMotherboardGraphicsRAM
A10 6800K Asus F2A85-V MSI 6870 Hawx, VTX3D 5770, AMD HD6950(RIP), Sap... G.skill Ripjaws PC12800 6-8-6-24 
Hard DriveOptical DriveOSMonitor
Seagate 7200.5 1TB NEC 3540 Dvd-Rom Windows 7 x32 Ultimate Samsung P2350 23" 1080p 
PowerCaseMouseAudio
Seasonic s12-600w CoolerMaster Centurion 5 Logitech G600 Auzen X-Fi Raider 
CPUMotherboardGraphicsRAM
Quad Krait 300 at 1.5Ghz Qualcomm APQ8064-1AA SOC Adreno 320 at 400mhz 2GB DDR3L-1600 
Hard DriveOSMonitorKeyboard
32GB Internal NAND Android 5.0 7" 1920X1200 103% sRGB & 572 cd/m2 LTPS IPS Microsoft Wedge Mobile Keyboard 
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post #2 of 5
I also found that but really other test points to a different result with i7 ahead i5
post #3 of 5
Thread Starter 
Quote:
Originally Posted by PontiacGTX View Post

I also found that but really other test points to a different result with i7 ahead i5
Who would have thought SandyBridge to have some life left: indeed, it is alive and kicking.
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Quad Krait 300 at 1.5Ghz Qualcomm APQ8064-1AA SOC Adreno 320 at 400mhz 2GB DDR3L-1600 
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32GB Internal NAND Android 5.0 7" 1920X1200 103% sRGB & 572 cd/m2 LTPS IPS Microsoft Wedge Mobile Keyboard 
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The Machine
(14 items)
 
Nexus 7 2013
(11 items)
 
 
CPUMotherboardGraphicsRAM
A10 6800K Asus F2A85-V MSI 6870 Hawx, VTX3D 5770, AMD HD6950(RIP), Sap... G.skill Ripjaws PC12800 6-8-6-24 
Hard DriveOptical DriveOSMonitor
Seagate 7200.5 1TB NEC 3540 Dvd-Rom Windows 7 x32 Ultimate Samsung P2350 23" 1080p 
PowerCaseMouseAudio
Seasonic s12-600w CoolerMaster Centurion 5 Logitech G600 Auzen X-Fi Raider 
CPUMotherboardGraphicsRAM
Quad Krait 300 at 1.5Ghz Qualcomm APQ8064-1AA SOC Adreno 320 at 400mhz 2GB DDR3L-1600 
Hard DriveOSMonitorKeyboard
32GB Internal NAND Android 5.0 7" 1920X1200 103% sRGB & 572 cd/m2 LTPS IPS Microsoft Wedge Mobile Keyboard 
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3950mAh/15.01mAh Battery Stereo Speakers 
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post #4 of 5
Sandy bridge without any singlethread-limiting scenario is one of the best cpus,and basically 20% behind skylake
post #5 of 5
Sandy Bridge has an L3 cache that operates at full core speed while Haswell, Broadwell, and Skylate (as well as the older Nehalem and Westmere) have lower clocked, higher latency, L3s. This could be cause for some of the relative discrepancy in the multi-tasking performance. However, the Broadwell part shown here has a huge L4 cache which helps considerably in WinRAR and likely benefits heavy multi-tasking in general.

Certain loads could also be leveraging instructions that Sandy Bridge does not have, creating situations where there are too few free execution resources for how the tasks were scheduled.
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