The Dallas Mavericks have the highest point differential by a team in a game 7, with a 40 point differential in Game 7 of the 2005 First Round against the Rockets.

nba biggest margin of victory in a game 7

TEAM	DIFF	DATE	TM		OPP	RESULT	MIN	PTS	REB	AST	STL	BLK	TOV	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	PF
Dallas Mavericks	40	5/7/2005	DAL	vs	HOU	W 116-76	240	116	52	21	7	10	13	41	80	51.3	8	16	50.0	26	28	92.9	19
Philadelphia Warriors	39	4/6/1948	PHI	@	STL	W 85-46	240	85		12				34	96	35.4				17	28	60.7	16
Los Angeles Lakers	35	4/9/1970	LAL	vs	PHX	W 129-94	240	129	68	44				54	102	52.9				21	36	58.3	21
Boston Celtics	34	5/4/2008	BOS	vs	ATL	W 99-65	240	99	46	20	11	10	8	40	84	47.6	3	18	16.7	16	19	84.2	19
Dallas Mavericks	33	5/15/2022	DAL	@	PHX	W 123-90	240	123	43	14	9	6	11	46	81	56.8	19	39	48.7	12	12	100.0	17
Miami Heat	33	5/1/2016	MIA	vs	CHA	W 106-73	240	106	58	24	2	8	9	43	89	48.3	9	24	37.5	11	16	68.8	16
Phoenix Suns	31	5/6/2006	PHX	vs	LAL	W 121-90	240	121	37	24	5	3	10	47	77	61.0	10	21	47.6	17	18	94.4	13
Chicago Bulls	29	5/17/1992	CHI	vs	NYK	W 110-81	240	110	34	31	13	8	14	43	74	58.1	3	4	75.0	21	28	75.0	24
Boston Celtics	28	5/15/2022	BOS	vs	MIL	W 109-81	240	109	48	29	5	7	12	37	88	42.0	22	55	40.0	13	18	72.2	19
Toronto Raptors	27	5/15/2016	TOR	vs	MIA	W 116-89	240	116	50	17	8	4	9	39	85	45.9	9	20	45.0	29	43	67.4	23
Indiana Pacers	27	5/7/2005	IND	@	BOS	W 97-70	240	97	40	23	11	9	12	32	69	46.4	10	17	58.8	23	30	76.7	17
Boston Celtics	24	5/14/2023	BOS	vs	PHI	W 112-88	240	112	43	18	7	7	7	41	87	47.1	15	33	45.5	15	18	83.3	13
Orlando Magic	24	6/4/1995	ORL	vs	IND	W 105-81	240	105	40	26	9	8	12	41	72	56.9	13	27	48.1	10	24	41.7	28
San Antonio Spurs	23	5/4/2014	SAS	vs	DAL	W 119-96	240	119	40	21	10	4	11	42	74	56.8	10	24	41.7	25	33	75.8	21
Miami Heat	23	6/3/2013	MIA	vs	IND	W 99-76	240	99	43	14	11	5	10	30	77	39.0	6	16	37.5	33	38	86.8	22
Atlanta Hawks	21	5/2/2010	ATL	vs	MIL	W 95-74	240	95	55	21	1	8	9	36	76	47.4	6	16	37.5	17	21	81.0	21
Detroit Pistons	21	5/20/2004	DET	vs	NJN	W 90-69	240	90	42	23	5	4	8	34	85	40.0	8	21	38.1	14	18	77.8	20
Golden State Warriors	20	4/30/2023	GSW	@	SAC	W 120-100	240	120	55	25	4	6	7	43	100	43.0	15	46	32.6	19	30	63.3	23
Phoenix Suns	20	5/22/2006	PHX	vs	LAC	W 127-107	240	127	32	32	5	3	12	48	80	60.0	15	27	55.6	16	19	84.2	22
Miami Heat	19	5/29/2023	MIA	@	BOS	W 103-84	240	103	42	26	7	2	12	42	86	48.8	14	28	50.0	5	6	83.3	15
Orlando Magic	19	5/17/2009	ORL	@	BOS	W 101-82	240	101	35	26	4	8	16	36	70	51.4	13	21	61.9	16	20	80.0	20
Los Angeles Lakers	19	5/17/2009	LAL	vs	HOU	W 89-70	240	89	55	16	8	10	19	35	75	46.7	5	15	33.3	14	18	77.8	17
Detroit Pistons	19	6/3/1990	DET	vs	CHI	W 93-74	240	93	46	21	8	7	12	37	72	51.4	1	5	20.0	18	22	81.8	22
Washington Bullets	19	4/25/1975	WAS	vs	BUF	W 115-96	240	115	53	27				45	90	50.0				25	34	73.5	20
Boston Celtics	19	4/9/1960	BOS	vs	STL	W 122-103	240	122	78	27				50	114	43.9				22	29	75.9	25