AMD Excavator Family 15h is amicroarchitecture developed byAMD to succeedSteamroller Family 15h for use inAMD APU processors and normal CPUs. On October 12, 2011, AMD revealed Excavator to be the code name for the fourth-generationBulldozer-derived core.

The Excavator-basedAPU for mainstream applications is calledCarrizo and was released in 2015.^[3][4] TheCarrizo APU is designed to beHSA 1.0 compliant.^[5] An Excavator-based APU and CPU variant namedToronto for server and enterprise markets was also produced.^[6]

Excavator was the final revision of the"Bulldozer" family, with two new microarchitectures replacing Excavator a year later.^[7][8] Excavator was succeeded by thex86-64Zen architecture in early 2017.^[9][10]

Excavator added hardware support for new instructions such asAVX2,BMI2 andRDRAND.^[11]Excavator is designed using High Density (aka "Thin") Libraries normally used forGPUs to reduceelectric energy consumption and die size, delivering a 30 percent increase inefficient energy use.^[12] Excavator can process up to 15% more instructions per clock compared to AMD's previous core Steamroller.^[13]

AMD'sFusion Controller Hub has been discontinued since the release of the Carrizo series of CPUs as it has been integrated into the same die as the rest of the CPU.^[14]

The following table shows features ofAMD's processors with 3D graphics, includingAPUs (see also:List of AMD processors with 3D graphics).

Platform			High, standard and low power														Low and ultra-low power
Codename	Server	Basic						Toronto
		Micro																Kyoto
	Desktop	Performance													Raphael	Phoenix
		Mainstream	Llano	Trinity	Richland	Kaveri	Kaveri Refresh (Godavari)	Carrizo	Bristol Ridge	Raven Ridge	Picasso	Renoir	Cezanne
		Entry
		Basic																Kabini				Dalí
	Mobile	Performance										Renoir	Cezanne	Rembrandt	Dragon Range
		Mainstream	Llano	Trinity	Richland	Kaveri		Carrizo	Bristol Ridge	Raven Ridge	Picasso	Renoir Lucienne	Cezanne Barceló			Phoenix
		Entry																				Dalí			Mendocino
		Basic															Desna, Ontario, Zacate	Kabini, Temash	Beema, Mullins	Carrizo-L	Stoney Ridge		Pollock
	Embedded			Trinity		Bald Eagle		Merlin Falcon, Brown Falcon		Great Horned Owl		Grey Hawk					Ontario, Zacate	Kabini	Steppe Eagle,Crowned Eagle, LX-Family		Prairie Falcon	Banded Kestrel		River Hawk
Released			Aug 2011	Oct 2012	Jun 2013	Jan 2014	2015	Jun 2015	Jun 2016	Oct 2017	Jan 2019	Mar 2020	Jan 2021	Jan 2022	Sep 2022	Jan 2023	Jan 2011	May 2013	Apr 2014	May 2015	Feb 2016	Apr 2019	Jul 2020	Jun 2022	Nov 2022
CPUmicroarchitecture			K10	Piledriver		Steamroller		Excavator	"Excavator+"[15]	Zen	Zen+	Zen 2	Zen 3	Zen 3+	Zen 4		Bobcat	Jaguar	Puma	Puma+[16]	"Excavator+"	Zen		Zen+	"Zen 2+"
ISA			x86-64 v1	x86-64 v2				x86-64 v3							x86-64 v4		x86-64 v1	x86-64 v2			x86-64 v3
Socket	Desktop	Performance	—												AM5	—	—
		Mainstream	—					AM4						—		—
		Entry	FM1	FM2		FM2+		FM2+[a],AM4	AM4					—
		Basic	—														—	AM1	—			FP5	—
	Other		FS1	FS1+,FP2		FP3		FP4		FP5		FP6		FP7	FL1	FP7 FP7r2 FP8	FT1	FT3	FT3b		FP4	FP5	FT5	FP5	FT6
PCI Express version			2.0			3.0								4.0	5.0	4.0	2.0				3.0
CXL			—														—
Fab. (nm)			GF32SHP (HKMGSOI)			GF28SHP (HKMG bulk)				GF14LPP (FinFET bulk)	GF12LP (FinFET bulk)	TSMCN7 (FinFET bulk)		TSMCN6 (FinFET bulk)	CCD: TSMCN5 (FinFET bulk) cIOD: TSMCN6 (FinFET bulk)	TSMC4nm (FinFET bulk)	TSMCN40 (bulk)	TSMCN28 (HKMG bulk)	GF 28SHP (HKMG bulk)			GF14LPP (FinFET bulk)		GF12LP (FinFET bulk)	TSMCN6 (FinFET bulk)
Die area (mm2)			228	246		245		245	250	210[17]		156	180	210	CCD: (2x) 70 cIOD: 122	178	75(+ 28FCH)	107		?	125	149			~100
MinTDP (W)			35	17				12				10		15	65	35	4.5	4	3.95	10	6			12	8
Max APUTDP (W)			100			95		65						45	170	54	18	25					6	54	15
Max stock APU base clock (GHz)			3	3.8	4.1	4.1		3.7	3.8	3.6	3.7	3.8	4.0	3.3	4.7	4.3	1.75	2.2	2	2.2	3.2	2.6	1.2	3.35	2.8
Max APUs per node[b]			1														1
Max core dies per CPU			1												2	1	1
Max CCX per core die			1									2	1				1
Max cores per CCX			4										8				2	4			2			4
MaxCPU[c]cores per APU			4									8			16	8	2	4			2			4
Maxthreads per CPU core			1							2							1					2
Integer pipeline structure			3+3	2+2						4+2		4+2+1	1+3+3+1+2				1+1+1+1				2+2	4+2			4+2+1
i386, i486, i586, CMOV, NOPL, i686,PAE,NX bit, CMPXCHG16B,AMD-V,RVI,ABM, and 64-bit LAHF/SAHF
IOMMU[d]			—	v2													v1		v2
BMI1,AES-NI,CLMUL, andF16C																	—
MOVBE			—
AVIC,BMI2,RDRAND, and MWAITX/MONITORX																	—
SME[e],TSME[e],ADX,SHA,RDSEED,SMAP,SMEP, XSAVEC, XSAVES, XRSTORS, CLFLUSHOPT, CLZERO, and PTE Coalescing			—														—
GMET, WBNOINVD, CLWB, QOS, PQE-BW, RDPID, RDPRU, and MCOMMIT			—														—
MPK,VAES			—														—
SGX			—														—
FPUs percore			1	0.5						1							1				0.5	1
Pipes per FPU			2														2
FPU pipe width			128-bit									256-bit					80-bit	128-bit							256-bit
CPUinstruction setSIMD level			SSE4a[f]	AVX				AVX2							AVX-512		SSSE3	AVX			AVX2
3DNow!			3DNow!+	—													—
PREFETCH/PREFETCHW
GFNI			—														—
AMX			—
FMA4, LWP,TBM, andXOP			—							—							—					—
FMA3
AMD XDNA			—														—
L1 data cache per core (KiB)			64	16				32									32
L1 data cacheassociativity (ways)			2	4				8									8
L1 instruction caches percore			1	0.5						1							1				0.5	1
Max APU total L1 instruction cache (KiB)			256	128		192				256					512	256	64		128		96	128
L1 instruction cacheassociativity (ways)			2			3				4		8					2				3	4			8
L2 caches percore			1	0.5						1							1				0.5	1
Max APU total L2 cache (MiB)			4					2				4			16		1	2			1			2
L2 cacheassociativity (ways)			16							8							16					8
Max on-dieL3 cache per CCX (MiB)			—							4			16		32		—						4
Max 3D V-Cache per CCD (MiB)										—					64	—							—
Max total in-CCDL3 cache per APU (MiB)										4		8	16		64								4
Max. total 3D V-Cache per APU (MiB)										—					64	—							—
Max. boardL3 cache per APU (MiB)										—													—
Max totalL3 cache per APU (MiB)										4		8	16		128								4
APU L3 cacheassociativity (ways)										16													16
L3 cache scheme										Victim													Victim
Max.L4 cache			—														—
Max stockDRAM support			DDR3-1866		DDR3-2133			DDR3-2133,DDR4-2400	DDR4-2400	DDR4-2933		DDR4-3200,LPDDR4-4266		DDR5-4800,LPDDR5-6400	DDR5-5200	DDR5-5600,LPDDR5x-7500	DDR3L-1333	DDR3L-1600	DDR3L-1866		DDR3-1866,DDR4-2400	DDR4-2400	DDR4-1600	DDR4-3200	LPDDR5-5500
MaxDRAM channels per APU			2														1					2	1	2
Max stockDRAMbandwidth (GB/s) per APU			29.866		34.132			38.400		46.932		68.256		102.400	83.200	120.000	10.666	12.800	14.933		19.200	38.400	12.800	51.200	88.000
GPUmicroarchitecture			TeraScale 2 (VLIW5)	TeraScale 3 (VLIW4)		GCN 2nd gen		GCN 3rd gen		GCN 5th gen[18]				RDNA 2		RDNA 3	TeraScale 2 (VLIW5)	GCN 2nd gen			GCN 3rd gen[18]	GCN 5th gen			RDNA 2
GPUinstruction set			TeraScale instruction set			GCN instruction set								RDNA instruction set			TeraScale instruction set	GCN instruction set							RDNA instruction set
Max stock GPU base clock (MHz)			600	800	844	866		1108		1250	1400	2100		2400	400		538	600	?	847	900	1200	600	1300	1900
Max stock GPU baseGFLOPS[g]			480	614.4	648.1	886.7		1134.5		1760	1971.2	2150.4		3686.4	102.4		86	?	?	?	345.6	460.8	230.4	1331.2	486.4
3D engine[h]			Up to 400:20:8	Up to 384:24:6		Up to 512:32:8				Up to 704:44:16[19]		Up to 512:32:8		768:48:8	128:8:4		80:8:4	128:8:4			Up to 192:12:8	Up to 192:12:4	192:12:4	Up to 512:?:?	128:?:?
			IOMMUv1			IOMMUv2											IOMMUv1		?		IOMMUv2
Video decoder			UVD 3.0			UVD 4.2		UVD 6.0		VCN 1.0[20]		VCN 2.1[21]	VCN 2.2[21]	VCN 3.1		?	UVD 3.0	UVD 4.0	UVD 4.2		UVD 6.2	VCN 1.0			VCN 3.1
Video encoder			—	VCE 1.0		VCE 2.0		VCE 3.1									—	VCE 2.0			VCE 3.4
AMD Fluid Motion
GPU power saving			PowerPlay	PowerTune													PowerPlay	PowerTune[22]
TrueAudio			—			[23]							?				—
FreeSync						1 2												1 2
HDCP[i]			?			1.4				2.2				2.3			?	1.4				2.2			2.3
PlayReady[i]			—							3.0 not yet							—					3.0 not yet
Supported displays[j]			2–3	2–4				3		3 (desktop) 4 (mobile, embedded)		4					2				3	4		4
/drm/radeon[k][25][26]									—												—
/drm/amdgpu[k][27]			—			[28]											—	[28]

There are threeAPU lines announced or released:

1. Budget and mainstream markets (desktop and mobile):Carrizo APU
   • TheCarrizo mobile APUs were launched in 2015 based onExcavator x86 cores and featuringHeterogeneous System Architecture for integrated task sharing between CPUs and GPUs, which allows a GPU to perform compute functions, which is claimed provide greater performance increases than shrinking the feature size alone.^[5]
   • Carrizo desktop APUs were launched in 2018. The mainstream product (A8-7680) has 4 Excavator cores and a GPU based on GCN1.2 architecture. Also, an entry-level APU (A6-7480) with 2 Excavator cores is also launched.
2. Budget and mainstream markets (desktop and mobile):Bristol Ridge, andStoney Ridge (for entry level notebooks), APUs^[29]
   • Bristol Ridge APUs utilizesocket AM4 andDDR4 RAM
   • Bristol Ridge APUs have up to 4 Excavator CPU cores and up to 8 3rd generationGCN GPU cores
   • Up to a 20% CPU performance increase over Carrizo
   • TDP of 15W to 65W, 15–35W for mobile
3. Enterprise and server markets: Toronto APU
   • TheToronto APU for server and enterprise markets featured four x86 Excavator CPU core modules andVolcanic Islands integrated GPU core.
   • TheExcavator cores has a greater advantage withIPC thanSteamroller. The improvement is 4–15%.
   • Support forHSA/hUMA,DDR3/DDR4,PCIe 3.0,GCN 1.2^[5][6][10]
   • TheToronto APU was available inBGA andSoC variants. The SoC variant had thesouthbridge on the same die as the APU to save space and power and to optimize workloads.
   • A complete system with a Toronto APU would have a maximum power usage of 70 W.^[6]

There are no CPUs built onSteamroller (3rd genBulldozer) or Excavator (4th gen Bulldozer) architectures on high-end desktop platforms.

Excavator CPU for Desktop announced on 2nd Feb 2016, named Athlon X4 845.^[30] In 2017, three more desktop CPUs (Athlon X4 9x0) were launched. They come in Socket AM4, with a TDP of 65W. In fact, they are APUs with their graphics cores disabled.

The AMD Opteron roadmaps for 2015 show the Excavator-basedToronto APU andToronto CPU intended for 1 Processor (1P) cluster applications:^[6]

• For 1P Web and Enterprise Services Clusters:
  • Toronto CPU – quad-core x86 Excavator architecture
  • plans forCambridge CPU – 64-bitAArch64 core
• For 1P Compute and Media Clusters:
  • Toronto APU – quad-core x86 Excavator architecture
• For 2P/4P Servers:
  • Warsaw CPU – 12/16 core x86Piledriver (2nd gen Bulldozer) (Opteron 6338P and 6370P)
  • no plans forSteamroller (3rd genBulldozer) or Excavator (4th gen Bulldozer) architectures on high-end multi-processor platforms

• AMD x86 microprocessors
• AMD microarchitectures
• X86 microarchitectures

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