Editing Pentium D (section)

{{Short description|Family of Intel microprocessors}}
{{distinguish|Pentium Dual-Core}}
{{Infobox CPU
| name        = Pentium D
| image       = Intel Pentium D Logo.png
| image_size  = 138px
| caption     = Logo as of 2006
| produced-start = {{Start date and age|2005|05|25}}
| produced-end = {{End date and age|2010|07|13}}<ref>{{cite web |title=Product Change Notification, 107779 - 00 |url=https://qdms.intel.com/dm/i.aspx/B5883E95-206A-481F-8A33-A81B6E7F14D7/PCN107779-00.pdf |publisher=Intel |year=2007}}</ref>
| slowest     = 2.66  | slow-unit     = GHz
| fastest     = 3.73  | fast-unit     = GHz
| fsb-slowest = 533  | fsb-slow-unit = MT/s
| fsb-fastest = 1066  | fsb-fast-unit = MT/s
| manuf1      = Intel
| core1       = Smithfield
| core2       = Presler
| size-from   = 90&nbsp;nm
| size-to     = 65&nbsp;nm
| arch        = [[x86-64]]
| microarch   = [[NetBurst]]
| sock1       = [[LGA 775]] (Socket T)
| numcores    = 2 (2×1)
| predecessor  = {{ubl|[[Pentium 4]]|[[Pentium 4 HT]]}}
| successor  = {{ubl|[[Intel Core 2|Core 2]] (2006)|[[Pentium Dual-Core]] (2007)}}
| support status = Unsupported
|soldby=Intel|designfirm=Intel|code=Smithfield: 80551<br/>Presler: 80553|l2cache=2–4 MB|l1cache=32 KB (16 KB (8 KB instructions + 8 KB data) x 2)|instructions=[[MMX (instruction set)|MMX]], [[Streaming SIMD Extensions|SSE]], [[SSE2]], [[SSE3]]|cpuid=0F47h (Smithfield)<br/>0F65h (Presler)|transistors1=Smithfield: 176 million|transistors2=Presler: 376 million|extensions1=[[SpeedStep|EIST]], [[VT-x]]|application=Dual-core desktop}}
'''Pentium D'''<ref>{{cite web |title=The Pentium D: Intel's Dual Core Silver Bullet Previewed |date=5 April 2005 |url=https://www.tomshardware.com/reviews/pentium-d,1006.html |publisher=Tom's Hardware |access-date=2007-07-08}}</ref> is a range of desktop 64-bit [[x86-64]] processors based on the [[NetBurst]] microarchitecture, which is the [[Multi-core processor|dual-core]] variant of the [[Pentium 4]] manufactured by [[Intel]]. Each [[CPU]] comprised two cores. The brand's first processor, codenamed Smithfield and manufactured on the [[90 nm process]], was released on May 25, 2005, followed by the [[65 nm]] Presler nine months later.<ref>{{cite web |title=The 65 nm Pentium D 900's Coming Out Party: Test Setup |url=http://www.tomshardware.com/2006/01/05/the_65_nm_pentium_d_900s_coming_out_party/page6.html |publisher=Tom's Hardware |access-date=2007-07-04}}</ref> The core implementation on the 90 nm Smithfield and later 65 nm Presler are designed differently but are functionally the same. The 90 nm Smithfield contains a single [[Die (integrated circuit)|die]], with two adjoined but functionally separate CPU cores cut from the same [[wafer (electronics)|wafer]]. The later 65 nm Presler utilized a [[multi-chip module]] package, where two discrete dies each containing a single core reside on the CPU substrate. Neither the 90 nm Smithfield nor the 65 nm Presler were capable of direct core to core communication, relying instead on the [[Northbridge (computing)|northbridge]] link to send information between the two cores.

By 2004, the NetBurst processors reached a [[clock speed]] barrier at 3.8&nbsp;GHz due to a thermal (and power) limit exemplified by the Presler's 130 watt [[thermal design power]]<ref name="toms-p5"/> (a higher TDP requires additional cooling that can be prohibitively noisy or expensive). The future belonged to more energy efficient and slower clocked [[dual-core]] CPUs on a single die instead of two.<ref>{{cite web |title=Intel Moves From Dual Core To Double Core: 65 nm Intel Double Core Preslers Forward |date=10 October 2005 |url=https://www.tomshardware.com/reviews/intel-moves-dual-core-double-core,1142.html |publisher=Tom's Hardware |access-date=2007-08-05}}</ref> However, the Pentium D did not offer significant upgrades in design,<ref>{{cite web |title=The 65 nm Pentium D 900's Coming Out Party: The 65 nm NetBurst |url=http://www.tomshardware.com/2006/01/05/the_65_nm_pentium_d_900s_coming_out_party/index.html |publisher=Tom's Hardware |access-date=2007-08-05}}</ref> still resulting in relatively high power consumption.<ref name="toms-p5">{{cite web |title=The 65 nm Pentium D 900's Coming Out Party: Thermal Design Power Overview |url=http://www.tomshardware.com/2006/01/05/the_65_nm_pentium_d_900s_coming_out_party/page5.html |archive-url=https://archive.today/20120702232159/http://www.tomshardware.com/2006/01/05/the_65_nm_pentium_d_900s_coming_out_party/page5.html |url-status=dead |archive-date=July 2, 2012 |publisher=Tom's Hardware |access-date=2007-08-05 }}</ref>

The final shipment date of the dual die Presler chips was August 8, 2008,<ref>{{cite web |title=Intel intros 3.0 GHz quad-core Xeon, drops Pentiums |url=http://www.tgdaily.com/content/view/33351/135/ |publisher=TG Daily |access-date=2007-08-14 |archive-date=2007-09-26 |archive-url=https://web.archive.org/web/20070926231529/http://www.tgdaily.com/content/view/33351/135/ |url-status=dead }}</ref> which marked the end of the Pentium D brand and also the NetBurst microarchitecture. The Pentium D line was removed from the official price lists on July 13, 2010.