Overclock.net › Forums › Industry News › Hardware News › [Ars] What you need to know about Intel's Nehalem CPU
New Posts  All Forums:Forum Nav:

[Ars] What you need to know about Intel's Nehalem CPU

post #1 of 5
Thread Starter 
http://arstechnica.com/articles/paed...ut-nehalem.ars

Great article that goes a bit more into the technical details of Nehalem.

Interesting exercpt:
Quote:
Intel made other major improvements to Nehalem's front end in the area of macrofusion. You may recall from my article on the Core 2 Duo that macrofusion is a technique that the Core microarchitecture uses to fuse some pairs of x86 instructions (compare + jump) together prior to decoding. On a cycle when two instructions can be macrofused, this gives the processor's front end a "virtual" fifth decoder, because it is decoding an extra x86 instruction on that cycle.

Nehalem widens the number of x86 instructions that can be macrofused in two ways. First, it expands four new compare + jump branch conditions to the list of macrofusable instruction pairs. Second—and this is major—it can now macrofuse 64-bit instructions. Core 2's macrofusion hardware is limited to 32-bit instructions only.

By expanding the list of instructions that can be macrofused to include new branch conditions and 64-bit instructions, Nehalem gains that virtual fifth decoder for a greater number of instructions. This improves overall decode bandwidth and plays a key role in keeping the core's execution engine fed.
    
CPUMotherboardGraphicsRAM
X2 5000+ BE Gigabyte GA-MA78GM-S2H AM2+ Integrated HD3200 2x2GB OCZ DDR2 
Hard DriveMonitorPowerCase
Maxtor 40GB Samsung 2220WM 22" Antec Neo HE 550W Ultra Wizard 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
X2 5000+ BE Gigabyte GA-MA78GM-S2H AM2+ Integrated HD3200 2x2GB OCZ DDR2 
Hard DriveMonitorPowerCase
Maxtor 40GB Samsung 2220WM 22" Antec Neo HE 550W Ultra Wizard 
  hide details  
Reply
post #2 of 5
In short, fast as hell.
    
CPUMotherboardGraphicsRAM
E8400 Lapped @4GHz Asus Maximus Formula X38 XFX GTX260 core 216 Black Edition Corsair Dominator 2x1gb DDR2 
Hard DriveOSMonitorKeyboard
WD Raptor 150 RAID0 Windows Vista Home Premium 32 Bit Acer 24'' Logitech G15 (Blue) 
PowerCaseMouse
Corsair 620HX Microcool Banchetto 101 Logitech G5 (Blue) 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
E8400 Lapped @4GHz Asus Maximus Formula X38 XFX GTX260 core 216 Black Edition Corsair Dominator 2x1gb DDR2 
Hard DriveOSMonitorKeyboard
WD Raptor 150 RAID0 Windows Vista Home Premium 32 Bit Acer 24'' Logitech G15 (Blue) 
PowerCaseMouse
Corsair 620HX Microcool Banchetto 101 Logitech G5 (Blue) 
  hide details  
Reply
post #3 of 5
Good find. Nehalem sounds like it is going to own.
Foldatron
(17 items)
 
Mat
(10 items)
 
Work iMac
(9 items)
 
CPUMotherboardGraphicsGraphics
i7 950 EVGA x58 3-way SLI EVGA GTX 660ti GTX 275 
RAMHard DriveHard DriveHard Drive
3x2GB Corsair Dominator DDR3-1600 80GB Intel X25-M SSD 2TB WD Black 150GB WD Raptor 
Hard DriveOSMonitorKeyboard
2x 150GB WD V-raptor in RAID0 Win7 Home 64-bit OEM 55" LED 120hz 1080p Vizio MS Natural Ergonomic Keyboard 4000 
PowerCase
750W PC P&C Silencer CoolerMaster 690 
CPUGraphicsRAMHard Drive
Intel Core i5 2500S AMD 6770M 8GB (2x4GB) at 1333Mhz 1TB, 7200 rpm 
Optical DriveOSMonitorKeyboard
LG 8X Dual-Layer "SuperDrive" OS X Lion 27" iMac screen Mac wireless keyboard 
Mouse
Mac wireless mouse 
CPUGraphicsRAMHard Drive
i7-2600K AMD 6970M 1GB 16GB PC3-10600 DDR3 1TB 7200rpm 
Hard DriveOptical DriveOSMonitor
256GB SSD 8x DL "SuperDrive" OS X 10.7 Lion 27" 2560x1440 iMac display 
Monitor
27" Apple thunderbolt display 
  hide details  
Reply
Foldatron
(17 items)
 
Mat
(10 items)
 
Work iMac
(9 items)
 
CPUMotherboardGraphicsGraphics
i7 950 EVGA x58 3-way SLI EVGA GTX 660ti GTX 275 
RAMHard DriveHard DriveHard Drive
3x2GB Corsair Dominator DDR3-1600 80GB Intel X25-M SSD 2TB WD Black 150GB WD Raptor 
Hard DriveOSMonitorKeyboard
2x 150GB WD V-raptor in RAID0 Win7 Home 64-bit OEM 55" LED 120hz 1080p Vizio MS Natural Ergonomic Keyboard 4000 
PowerCase
750W PC P&C Silencer CoolerMaster 690 
CPUGraphicsRAMHard Drive
Intel Core i5 2500S AMD 6770M 8GB (2x4GB) at 1333Mhz 1TB, 7200 rpm 
Optical DriveOSMonitorKeyboard
LG 8X Dual-Layer "SuperDrive" OS X Lion 27" iMac screen Mac wireless keyboard 
Mouse
Mac wireless mouse 
CPUGraphicsRAMHard Drive
i7-2600K AMD 6970M 1GB 16GB PC3-10600 DDR3 1TB 7200rpm 
Hard DriveOptical DriveOSMonitor
256GB SSD 8x DL "SuperDrive" OS X 10.7 Lion 27" 2560x1440 iMac display 
Monitor
27" Apple thunderbolt display 
  hide details  
Reply
post #4 of 5
OK, well at the risk of sounding stupid, what speed Nehalem will be equal to a, ... lets say an E8400?

Nobody really knows, I know, but maybe an educated mind could ball park it for me.
    
CPUMotherboardGraphicsRAM
Duo e8400 @ 4.2Ghz 1.37v eVGA Nforce 780i GTX465 + 9600gt Mushkin 4 Gigz 
Hard DriveOSMonitorKeyboard
1TB WD Black, Seagate 250GB + 400GB WD external ASUS VW266H ~ 26" 1200p MS X6 Sidewinder 
PowerCaseMouse Pad
OCZ GameXStream 700W CM Stacker Hustler mag 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Duo e8400 @ 4.2Ghz 1.37v eVGA Nforce 780i GTX465 + 9600gt Mushkin 4 Gigz 
Hard DriveOSMonitorKeyboard
1TB WD Black, Seagate 250GB + 400GB WD external ASUS VW266H ~ 26" 1200p MS X6 Sidewinder 
PowerCaseMouse Pad
OCZ GameXStream 700W CM Stacker Hustler mag 
  hide details  
Reply
post #5 of 5
I'm anticipating a performance jump even greater than the one AMD saw when it moved from Athlon XPs to Athlon 64s (which was quite massive in many apps).

My purely speculative, amaturely educated, conservative guess, is that a 2-2.2GHz Nehalem will match or beat an E8400 in the majority of applications.
Primary
(15 items)
 
Secondary
(13 items)
 
In progress
(10 items)
 
CPUMotherboardGraphicsRAM
5820K @ 4.2/3.5GHz core/uncore, 1.175/1.15v Gigabyte X99 SOC Champion (F22n) Gigabyte AORUS GTX 1080 Ti (F3P) @ 2025/1485, 1... 4x4GiB Crucial @ 2667, 12-12-12-28-T1, 1.34v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.06) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Noctua NH-D15 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Sapphire Fury Nitro OC+ @ 1053/500, 1.225vGPU/1... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
RAMHard DriveHard DriveHard Drive
1x Crucial BLT4G3D1608ET3LX0 @ 2000, 10-11-11-3... OCZ (Toshiba) Trion 150 120GB Hyundai Sapphire 120GB 3x Hitachi Deskstar 7k1000.C 1TB 
CoolingOSPowerCase
Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
Hard DriveHard DriveCoolingOS
Intel 600p 256GB NVMe 2x HGST Travelstar 7k1000 1TB Corsair H55 (temporary) Windows Server 2016 Datacenter 
PowerCase
Seasonic SS-860XP2 Corsair Carbide Air 540 
  hide details  
Reply
Primary
(15 items)
 
Secondary
(13 items)
 
In progress
(10 items)
 
CPUMotherboardGraphicsRAM
5820K @ 4.2/3.5GHz core/uncore, 1.175/1.15v Gigabyte X99 SOC Champion (F22n) Gigabyte AORUS GTX 1080 Ti (F3P) @ 2025/1485, 1... 4x4GiB Crucial @ 2667, 12-12-12-28-T1, 1.34v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.06) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Noctua NH-D15 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Sapphire Fury Nitro OC+ @ 1053/500, 1.225vGPU/1... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
RAMHard DriveHard DriveHard Drive
1x Crucial BLT4G3D1608ET3LX0 @ 2000, 10-11-11-3... OCZ (Toshiba) Trion 150 120GB Hyundai Sapphire 120GB 3x Hitachi Deskstar 7k1000.C 1TB 
CoolingOSPowerCase
Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
Hard DriveHard DriveCoolingOS
Intel 600p 256GB NVMe 2x HGST Travelstar 7k1000 1TB Corsair H55 (temporary) Windows Server 2016 Datacenter 
PowerCase
Seasonic SS-860XP2 Corsair Carbide Air 540 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Hardware News
Overclock.net › Forums › Industry News › Hardware News › [Ars] What you need to know about Intel's Nehalem CPU