Overclock.net › Forums › Industry News › Hardware News › [eTeknix] AMD Ryzen CCX Interconnect Infinity Fabric Tied to Memory Speeds
New Posts  All Forums:Forum Nav:

[eTeknix] AMD Ryzen CCX Interconnect Infinity Fabric Tied to Memory Speeds

post #1 of 15
Thread Starter 
Quote:
With their new Zen architecture, AMD has taken the x86 CPU market by storm. At long last, their Ryzen processors are finally competitive against Intel’s best offerings. Due to the dramatic changes made, the new chips are experiencing some growing pains and we are still working hard to get to know them better. Based off of quad-core CCX’s, it looks like the new chip design may feature something of a flaw when it comes to inter-core communication.
As with all large multi-core CPUs, an interconnect is required to join all the cores together. Smaller designs can get away with a simple ring bus but a higher core count requires more sophistication. Intel had to use the slow FSB for their first quad-core Core 2 chips for instance and a sophisticated ring bus layout for their HEDT chips. AMD has turned to their flexible Infinity Fabric to fill this role but we’re now discovering some drawbacks.

http://www.eteknix.com/amd-ryzen-ccx-interconnect-infinity-fabric-tied-to-memory-speeds/
post #2 of 15
This was known on day one and they are just now posting this?
Quote:
According to a new revelation from AMD, the speed Infinity Fabric runs at is linked to memory speeds.

doh.gif

" Revelation" from over two weeks ago.
Quote:

Edited by qwertymac93 - 3/19/17 at 11:28pm
z87
(18 items)
 
Media Rig
(18 items)
 
 
CPUMotherboardGraphicsRAM
AMD Phenom II 720 ASRock 870 Extreme 3 HIS 5750 (840core/1200mem) 2*2GB A-Data DDR3 1600 
Hard DriveHard DriveOptical DriveCooling
Seagate Barracuda ST1000DM003 Seagate Barracuda ST3000DM001 Lite-On Blue Ray WH14NS40 Arctic Cooling Freezer 64 PRO 
OSMonitorKeyboardPower
Windows 10 pro 64-bit Vizio M43-c1 Logitech K400 Corsair CX-430 
CaseMouseAudioAudio
NZXT Beta EVO Gigabyte M7700 Sony STR-DN1070 Definitive Technology BP8 Tower Speakers 
AudioAudio
Definitive Technology 2002 Series Center Speaker Definitive Technology ProMonitor 1000 Bookshelf... 
  hide details  
Reply
z87
(18 items)
 
Media Rig
(18 items)
 
 
CPUMotherboardGraphicsRAM
AMD Phenom II 720 ASRock 870 Extreme 3 HIS 5750 (840core/1200mem) 2*2GB A-Data DDR3 1600 
Hard DriveHard DriveOptical DriveCooling
Seagate Barracuda ST1000DM003 Seagate Barracuda ST3000DM001 Lite-On Blue Ray WH14NS40 Arctic Cooling Freezer 64 PRO 
OSMonitorKeyboardPower
Windows 10 pro 64-bit Vizio M43-c1 Logitech K400 Corsair CX-430 
CaseMouseAudioAudio
NZXT Beta EVO Gigabyte M7700 Sony STR-DN1070 Definitive Technology BP8 Tower Speakers 
AudioAudio
Definitive Technology 2002 Series Center Speaker Definitive Technology ProMonitor 1000 Bookshelf... 
  hide details  
Reply
post #3 of 15
Lol at "we're" discovering drawbacks.

You're not discovering jack.
   
AGP bencher
(14 items)
 
CPUMotherboardGraphicsRAM
Ryzen R7 1700 Gigabyte GA-AX370-Gaming 5 Sapphire HD 6950 2GiB 2x8GB KFA2 HOF DDR4-3600 
Hard DriveHard DriveHard DriveHard Drive
Crucial MX100 256GB Seagate 600 Series 240GB Seagate 7200.14 2TB Samsung F3 1TB 
CoolingCoolingCoolingCooling
EKWB Supreme HF XSPC Rasa GPU EK XT360 EK 4.0 
OSMonitorMonitorKeyboard
W10 Pro LG IPS235 LG E2250V KUL ES-87 
PowerCaseMouseAudio
SF Leadex II 650W Lian Li PC-A05NB Logitech G9 Xonar DX 
AudioAudio
SMSL SA-S3+Technics CB-250 Sennheiser HD555 
CPUMotherboardRAMHard Drive
AMD A10-5700 Gigabyte F2A75M-HD2 G.SKILL Ares 2133 CL9 Hitachi 5K750 
Hard DriveCoolingOSMonitor
Momentus .7 200GB Noctua NH-L9a Server 2012 R2 Standard AUO B156HW01 
PowerCaseOther
PicoPSU-80-WI-25V AIO Aluminium Handmade TP-Link Archer Something Something Wi-Fi AC 
CPUCPUCPUMotherboard
Core2Duo E6400 Core2Quad Q6600 Pentium Dual Core E5200 AsRock 4COREDUAL-SATA2 R2.0 
GraphicsRAMHard DriveOptical Drive
A dumpload of ancient AGP cards Kingston Value DDR2-667 CL4 2T @CL3 1T Seagate 160GB 7200.10 LG IDE DVD-ROM 
CoolingCoolingOSMonitor
Ghettomade CPU waterblock 49cc 2stroke engine copper radiator WinXP SP2 32bit ProView 17" 
PowerCase
Tacens Radix V 550W Ghetto aluminium bench 
  hide details  
Reply
   
AGP bencher
(14 items)
 
CPUMotherboardGraphicsRAM
Ryzen R7 1700 Gigabyte GA-AX370-Gaming 5 Sapphire HD 6950 2GiB 2x8GB KFA2 HOF DDR4-3600 
Hard DriveHard DriveHard DriveHard Drive
Crucial MX100 256GB Seagate 600 Series 240GB Seagate 7200.14 2TB Samsung F3 1TB 
CoolingCoolingCoolingCooling
EKWB Supreme HF XSPC Rasa GPU EK XT360 EK 4.0 
OSMonitorMonitorKeyboard
W10 Pro LG IPS235 LG E2250V KUL ES-87 
PowerCaseMouseAudio
SF Leadex II 650W Lian Li PC-A05NB Logitech G9 Xonar DX 
AudioAudio
SMSL SA-S3+Technics CB-250 Sennheiser HD555 
CPUMotherboardRAMHard Drive
AMD A10-5700 Gigabyte F2A75M-HD2 G.SKILL Ares 2133 CL9 Hitachi 5K750 
Hard DriveCoolingOSMonitor
Momentus .7 200GB Noctua NH-L9a Server 2012 R2 Standard AUO B156HW01 
PowerCaseOther
PicoPSU-80-WI-25V AIO Aluminium Handmade TP-Link Archer Something Something Wi-Fi AC 
CPUCPUCPUMotherboard
Core2Duo E6400 Core2Quad Q6600 Pentium Dual Core E5200 AsRock 4COREDUAL-SATA2 R2.0 
GraphicsRAMHard DriveOptical Drive
A dumpload of ancient AGP cards Kingston Value DDR2-667 CL4 2T @CL3 1T Seagate 160GB 7200.10 LG IDE DVD-ROM 
CoolingCoolingOSMonitor
Ghettomade CPU waterblock 49cc 2stroke engine copper radiator WinXP SP2 32bit ProView 17" 
PowerCase
Tacens Radix V 550W Ghetto aluminium bench 
  hide details  
Reply
post #4 of 15
Quote:
Originally Posted by Artikbot View Post

Lol at "we're" discovering drawbacks.

You're not discovering jack.
Well, it's not entirely a matter of certainty. When you're talking about designs with this level of complexity, I don't think it's hard to imagine a scenario where you misjudge the source of an issue. Sometimes you think you know the cause of an issue until you go to fix it, which may well have taken until after launch.

They probably chose to launch expecting it to be a an easy fix.
Trash Box
(15 items)
 
 
G73JH-A1
(13 items)
 
CPUMotherboardGraphicsRAM
i7 980x @ 4.4GHz Asus P6X58D-E Gigabyte 8GB GTX 1070 G1 Gaming 24GB Corsair Dominators 1600MHz 
Hard DriveHard DriveMonitorKeyboard
2x256GB C300's R0 1TB Samsung 850 Pro ASUS MG279Q, Catleap Q270 G19 
PowerCaseMouse
Corsair AX1200 Silverstone RV-02 G9x 
CPUMotherboardGraphicsRAM
AMD 965BE 125W Asus M4A77D Asus 5770 Cucore 4GB Kingston 800MHz 
Hard DriveOptical DriveOSKeyboard
2x750GB Seagates 22x LG DVD-RW w7 Ultimate 64-bit  G15 
PowerCase
Antec Earthwatts 430W 80+ Antec New Solution NSK6580B 
CPUMotherboardGraphicsRAM
720QM AsusTek Mobility HD5870 8GB Kingston 1600MHz 
Hard DriveOptical DriveOSMonitor
256GB C300/500GB Seagate Bluray Combo w7 Ultimate 64-bit 17'' 1080P 
Case
G73JH-A1 
  hide details  
Reply
Trash Box
(15 items)
 
 
G73JH-A1
(13 items)
 
CPUMotherboardGraphicsRAM
i7 980x @ 4.4GHz Asus P6X58D-E Gigabyte 8GB GTX 1070 G1 Gaming 24GB Corsair Dominators 1600MHz 
Hard DriveHard DriveMonitorKeyboard
2x256GB C300's R0 1TB Samsung 850 Pro ASUS MG279Q, Catleap Q270 G19 
PowerCaseMouse
Corsair AX1200 Silverstone RV-02 G9x 
CPUMotherboardGraphicsRAM
AMD 965BE 125W Asus M4A77D Asus 5770 Cucore 4GB Kingston 800MHz 
Hard DriveOptical DriveOSKeyboard
2x750GB Seagates 22x LG DVD-RW w7 Ultimate 64-bit  G15 
PowerCase
Antec Earthwatts 430W 80+ Antec New Solution NSK6580B 
CPUMotherboardGraphicsRAM
720QM AsusTek Mobility HD5870 8GB Kingston 1600MHz 
Hard DriveOptical DriveOSMonitor
256GB C300/500GB Seagate Bluray Combo w7 Ultimate 64-bit 17'' 1080P 
Case
G73JH-A1 
  hide details  
Reply
post #5 of 15
Wait so they threw almost everything on the Ram Bus?
 
Cerebro MK-2
(11 items)
 
First Build
(13 items)
 
CPUMotherboardGraphicsRAM
Intel i7 920(D0) @ 4ghz w/ 1.21vcore Asus P6T Deluxe Evga GTX560 ti 2gb Corsair Dominator 6gb 1600mhz 8-8-8-20-1T 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Black 1Tb LG Super Drive Prolimatech Megahalem (Push/Pull) Windows 7 x64 Ultimate 
MonitorMonitorKeyboardPower
Asus 23"HD 2ms Samsung 23"HD 5ms G15 Corsair AX850w 
CaseMouseMouse PadOther
Silverstone FT-02w G500 Large OCZ Pad Boston 2.1 Sound System 
OtherOther
Logitech G330 Headset Wacom Intuos3 Large 
MotherboardGraphicsRAMHard Drive
EVGA x585 Classified 4-Way SLI EVGA 780 Ti Classified Samsung Magic Ram Crucial M4 SSD 
OSKeyboardPowerCase
Windows 8.1 Steelseries Corsair AX850 with Red Sleeved Cables Corsair 900d 
MouseMouse PadAudio
Logitect G500 OCZ Cloth/Rubber Pad Large Sapphire Focusrite 49 
CPUMotherboardGraphicsRAM
Intel Core 2 Duo E6600@3.06ghz vcore-1.1875 EVGA 122-CK-NF68-AR NVIDIA nForce 680i Sli EVGA 256-P2-N624-AR GeForce 7900GS 256MB 256-bit Corsair Dominator DDR2 800 & OCZ Reaper DDR2 1066 
Hard DriveOptical DriveOSKeyboard
Western Digital Caviar SE16 WD3200KS 320GB SATA N/A Windows Xp, Windows 7 x64 Logitect G15(orginal) 
PowerCaseMouseMouse Pad
KINGWIN Mach 1 ABT-600MA1S 600W Cooler Master Mystique (silver) Logitech G7 Guild Wars Collectors 
  hide details  
Reply
 
Cerebro MK-2
(11 items)
 
First Build
(13 items)
 
CPUMotherboardGraphicsRAM
Intel i7 920(D0) @ 4ghz w/ 1.21vcore Asus P6T Deluxe Evga GTX560 ti 2gb Corsair Dominator 6gb 1600mhz 8-8-8-20-1T 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Black 1Tb LG Super Drive Prolimatech Megahalem (Push/Pull) Windows 7 x64 Ultimate 
MonitorMonitorKeyboardPower
Asus 23"HD 2ms Samsung 23"HD 5ms G15 Corsair AX850w 
CaseMouseMouse PadOther
Silverstone FT-02w G500 Large OCZ Pad Boston 2.1 Sound System 
OtherOther
Logitech G330 Headset Wacom Intuos3 Large 
MotherboardGraphicsRAMHard Drive
EVGA x585 Classified 4-Way SLI EVGA 780 Ti Classified Samsung Magic Ram Crucial M4 SSD 
OSKeyboardPowerCase
Windows 8.1 Steelseries Corsair AX850 with Red Sleeved Cables Corsair 900d 
MouseMouse PadAudio
Logitect G500 OCZ Cloth/Rubber Pad Large Sapphire Focusrite 49 
CPUMotherboardGraphicsRAM
Intel Core 2 Duo E6600@3.06ghz vcore-1.1875 EVGA 122-CK-NF68-AR NVIDIA nForce 680i Sli EVGA 256-P2-N624-AR GeForce 7900GS 256MB 256-bit Corsair Dominator DDR2 800 & OCZ Reaper DDR2 1066 
Hard DriveOptical DriveOSKeyboard
Western Digital Caviar SE16 WD3200KS 320GB SATA N/A Windows Xp, Windows 7 x64 Logitect G15(orginal) 
PowerCaseMouseMouse Pad
KINGWIN Mach 1 ABT-600MA1S 600W Cooler Master Mystique (silver) Logitech G7 Guild Wars Collectors 
  hide details  
Reply
post #6 of 15
Quote:
Originally Posted by Banedox View Post

Wait so they threw almost everything on the Ram Bus?

Not really... they did throw in Core to Core synchronization for large tasks onto the DRAM bus. This is normal. Intel CPUs also do this. What AMD added was Core to Core Coherency between two Cores of different Core Complexes. This makes RyZen quite a bit more sensitive to memory bandwidth and latency. High speed DRAM and a quad channel design (HEDT platform anyone?) would most likely end up unlocking the true potential behind RyZen.

This is going to take a short while though...
Kn0wledge
(20 items)
 
Pati3nce
(14 items)
 
Wisd0m
(10 items)
 
Reply
Kn0wledge
(20 items)
 
Pati3nce
(14 items)
 
Wisd0m
(10 items)
 
Reply
post #7 of 15
Quote:
Originally Posted by Banedox View Post

Wait so they threw almost everything on the Ram Bus?
"en dessous de"
 
LGA775 X5470
(8 items)
 
 
CPUMotherboardGraphicsRAM
i7-4790K 4.9GHz @1.375v Maximus VII Gene MSI 980TI 6G 1493/8190 2x8GB Trident X 2666C11 
RAMHard DriveHard DriveHard Drive
2x8GB Trident X 2933C12 Kingston HyperX 3K 240GB WD Blue WD6400AAKS 640GB Intel 530 120GB 
CoolingOSOSMonitor
480mm Radiator Custom Windows 7 Ultimate 64-bit Gentoo Linux 64 Multi-Lib Acer Predator XB271UH 165Hz 
KeyboardPowerCaseMouse
Logitech G710+ Seasonic 660XP2 Platinum Silverstone FT03 Logitech G502 
Audio
Supreme FX II 
CPUMotherboardGraphicsGraphics
X5470 4GHz (stock) GA-EP45-UD3P EVGA 8800GT Akimbo 1GB EVGA 9800 GTX+ 512MB 
RAMHard DriveCoolingCase
8GB 4x2GB GSkill 1066MHz DDR2 Toshiba 160GB SATA CM Hyper 212 EVO Centurion 534 
  hide details  
Reply
 
LGA775 X5470
(8 items)
 
 
CPUMotherboardGraphicsRAM
i7-4790K 4.9GHz @1.375v Maximus VII Gene MSI 980TI 6G 1493/8190 2x8GB Trident X 2666C11 
RAMHard DriveHard DriveHard Drive
2x8GB Trident X 2933C12 Kingston HyperX 3K 240GB WD Blue WD6400AAKS 640GB Intel 530 120GB 
CoolingOSOSMonitor
480mm Radiator Custom Windows 7 Ultimate 64-bit Gentoo Linux 64 Multi-Lib Acer Predator XB271UH 165Hz 
KeyboardPowerCaseMouse
Logitech G710+ Seasonic 660XP2 Platinum Silverstone FT03 Logitech G502 
Audio
Supreme FX II 
CPUMotherboardGraphicsGraphics
X5470 4GHz (stock) GA-EP45-UD3P EVGA 8800GT Akimbo 1GB EVGA 9800 GTX+ 512MB 
RAMHard DriveCoolingCase
8GB 4x2GB GSkill 1066MHz DDR2 Toshiba 160GB SATA CM Hyper 212 EVO Centurion 534 
  hide details  
Reply
post #8 of 15
It has already been debunked by digital foundry that performance is limited by RAM speeds, essentially the increase in RAM speeds sees similar increases in performance as it does on Intel CPUs. going from 2133mhz to 3200mhz a 47% increase only sees an average of 10% increase in performance. Similar to Intel with RAM they saw an 10% increase. All what it is can be summered with cognitive bias, AMD buyers doing post research to justify how amazing their CPU is so they can tell their how good consumers they are. Stats/benchmarks speaks for themselves
Villain
(14 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k @ 4,9 Ghz (v 1.42) ASUS 1155 P8P67 PRO REV 3.0 S/L Asus GTX 560 ti DirectCU II OC@950core / 2200 m... G.skill 1600mhz 9-9-9-24 T1 8GB 
Hard DriveCoolingOSMonitor
Samsung F3 HD103SJ 1TB Noctua NH-D14 win 7 64 bit LG W2363D-PF LCD 23 inch 120Hz 
PowerCase
XFX P1-850B-NLG9 850W In Win 
  hide details  
Reply
Villain
(14 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k @ 4,9 Ghz (v 1.42) ASUS 1155 P8P67 PRO REV 3.0 S/L Asus GTX 560 ti DirectCU II OC@950core / 2200 m... G.skill 1600mhz 9-9-9-24 T1 8GB 
Hard DriveCoolingOSMonitor
Samsung F3 HD103SJ 1TB Noctua NH-D14 win 7 64 bit LG W2363D-PF LCD 23 inch 120Hz 
PowerCase
XFX P1-850B-NLG9 850W In Win 
  hide details  
Reply
post #9 of 15
Quote:
Originally Posted by Banedox View Post

Wait so they threw almost everything on the Ram Bus?

Not even remotely. It is its own communication link but the frequency it is operated at is synchronized with the system memory clock speed.
post #10 of 15
Thread Starter 
Quote:
Originally Posted by QSS-5 View Post

It has already been debunked by digital foundry that performance is limited by RAM speeds, essentially the increase in RAM speeds sees similar increases in performance as it does on Intel CPUs. going from 2133mhz to 3200mhz a 47% increase only sees an average of 10% increase in performance. Similar to Intel with RAM they saw an 10% increase. All what it is can be summered with cognitive bias, AMD buyers doing post research to justify how amazing their CPU is so they can tell their how good consumers they are. Stats/benchmarks speaks for themselves

AMD buyers?

I do not own an AMD system...

People actually use they pc for important stuff and not just a toy for games.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Hardware News
Overclock.net › Forums › Industry News › Hardware News › [eTeknix] AMD Ryzen CCX Interconnect Infinity Fabric Tied to Memory Speeds