Processors

[Alita]

Hello,

I recently purchased a system with AMD Ryzen 9 7950X 16-Core Processor and I'm looking into ways to configure the fan control to have a small fan noise whenever is possible, without affecting the CPU long term.

The first thing that I did was to set the processor control mode to ECO and the curve optimizer mode to false, I don't know how much this configuration will impact the performance of the CPU, but I found it useful to decrease the temperature in a range between 40-60c. Initially, before the change, I got scared when I notice that in the default control mode, the temperature was rising to 95c at full CPU load and I tough my CPU will burn in a couple of weeks.

Finally, I installed a GCC fan control application, where I configured each fan that is available on my PC, and I'm looking into ways to configure it in an optimal way.

I have no experience with those modern computers, any help from somebody with a similar CPU will be very appreciated.

Thanks

[johnnyenglish · Accepted solution]

Hi, You can visit my thread "RAPHAEL", I'm constantly tweaking the 7950X as I wish to learn how much can I squeeze without too much pressure on the 240 Radiator AIO.

The best I got so far with a 36K (almost 37K) on cinebench, which is tad less than completely stock. This is the combo of tweaks:

EcoMode 105
Curve Optimizer all core -6
vCore Offset -0.08v
vSoC 1.2v
VDDIO MC 1.2v

All CCD1 cores will still push past 5.7Ghz and the max temp while rendering on DaVinci Resolve will be 78ºC Peak. Gaming at 60ºC and that is super comfy.

I can do better but I can't seem to get -15 Curve Optimizer stable on All Core so I'll have to to a per core Curve Optimizer. If I can go -20 on some and -10 on others I may be able to push past 38K on Cinebench

Beware, Curve Optimizer can put your VRM's to the test

Good Luck

[johnnyenglish · Accepted solution]

Hi, You can visit my thread "RAPHAEL", I'm constantly tweaking the 7950X as I wish to learn how much can I squeeze without too much pressure on the 240 Radiator AIO.

The best I got so far with a 36K (almost 37K) on cinebench, which is tad less than completely stock. This is the combo of tweaks:

EcoMode 105
Curve Optimizer all core -6
vCore Offset -0.08v
vSoC 1.2v
VDDIO MC 1.2v

All CCD1 cores will still push past 5.7Ghz and the max temp while rendering on DaVinci Resolve will be 78ºC Peak. Gaming at 60ºC and that is super comfy.

I can do better but I can't seem to get -15 Curve Optimizer stable on All Core so I'll have to to a per core Curve Optimizer. If I can go -20 on some and -10 on others I may be able to push past 38K on Cinebench

Beware, Curve Optimizer can put your VRM's to the test

Good Luck

[Alita]

Hi,

Is there a way to set all of those from AMD Rayzen Master or do I have to do them from BIOS?

Can you please share your fan control settings as well? The default settings is creating noise and I could not find an optimal way to set this up.

Thanks

[EMoney129]

I always use the Motherboard bios to adjust fan curves for case fans and the CPU cooler and GCC for my Gigabyte GPU. Highly recommend AMD's Adrenaline Software to customize clocks and monitor temperatures. The Ancient Gameplays channel on YouTube.com has a lot of great information on using Adrenaline and guidance on driver installs and settings. https://youtu.be/oltTkFODy8w is a good video to start with adjusting settings.

[johnnyenglish]

You can do the Curve Optimizer on Ryzen Master, its much more intuitive than some BIOS, but some settings you will only find in BIOS.

(Example Given)
Fan curve is very specific, You won't get good results from my fan curve if you use Corsair ML while I'm on Noctua's AF and iPPC. The RPM range/noise is different

I do my fan curves in ASUS proprietary Armoury Crate as they are tied to the BIOS.

How I do my fan curve?

Positive Pressure at idle and the more load the CPU gets, changes to Negative Pressure.

INTAKE Noctua 2x 140mm NF14 Airflow at ranges of 400-600rpm

EXHAUST Noctua 1x 120 NF12 Airflow at 600-900rpm (need to lower it to 800)

RADIATOR Noctua 2x 120 iPPC for Static Pressure at 400-1000rpm

[Alita]

Thank you for all the info, it will be great if AMD will implement 105w eco mode in AMD Ryzen Master and allow more testing to be done with a few clicks, instead of going to BIOS and changing the settings.

[ajlueke · Accepted solution]

Technically, it is in Ryzen Master.  All the 105W EcoMode setting does is drop the Ryzen 9 7900X from a 170W TDP mode to the 105W TDP.

TDPs themselves are defined by the PPT (Package Power in Watts), TDC (Thermal Design Current in Amps) and EDC (Electrical Design Current in Amps).

Together, those three values form the limits your processor will not exceed when boosting (as well as temperature).

For a 170W TDP processor, those limits are 230W PPT, 160A TDC and 225A EDC.   For a 105W processor, you have 142W PPT, 110A TDC and 170A EDC.  So to replicate the 105W Eco mode in Ryzen master, just create a profile and turn on Precision Boost Overdrive and manually set the PPT, TDC, EDC limits to 142, 110 and 170 respectively.  When you activate that profile you will be in 105W Eco mode.

You can also set those values to 88W, 75A and 150A for a 65W TDP mode if you wanted to test that.

[ajlueke]

Well now I can't help myself, I find this topic irresistible.

AMD gives out defined PPT/TDC/EDC for four different TDPs (170W, 120W, 105W, and 65W).

That is interesting because you can use those values to create linear expressions for TDP vs PPT, vs TDC and vs EDC.  Those expressions will then allow you to calculate what PPT/TDC/EDC would be for any TDP. 

So say you don't want to run at 95C and a 170W, but 105WTDP is maybe a bit to low?  Processor maxing out below 70C or something like that?  You can try a 115W TDP or 130W, whatever you like until you have the optimum performance for the noise level you want from your fan curve and temps on the CPU.  Just edit the PPT/TDC/EDC settings in your Ryzen Master profile following the table below to define your own ECO mode.

TDP (Watts)	PPT (Watts)	TDC (Amps)	EDC (Amps)
65	88	76	145
66	89	77	146
67	91	78	147
68	92	78	147
69	93	79	148
70	95	80	149
71	96	81	150
72	97	82	150
73	99	82	151
74	100	83	152
75	101	84	152
76	103	85	153
77	104	86	154
78	106	86	155
79	107	87	155
80	108	88	156
81	110	89	157
82	111	90	157
83	112	90	158
84	114	91	159
85	115	92	160
86	116	93	160
87	118	94	161
88	119	95	162
89	120	95	162
90	122	96	163
91	123	97	164
92	125	98	165
93	126	99	165
94	127	99	166
95	129	100	167
96	130	101	168
97	131	102	168
98	133	103	169
99	134	103	170
100	135	104	170
101	137	105	171
102	138	106	172
103	139	107	173
104	141	107	173
105	142	108	174
106	143	109	175
107	145	110	175
108	146	111	176
109	148	111	177
110	149	112	178
111	150	113	178
112	152	114	179
113	153	115	180
114	154	115	181
115	156	116	181
116	157	117	182
117	158	118	183
118	160	119	183
119	161	119	184
120	162	120	185
121	164	121	186
122	165	122	186
123	166	123	187
124	168	123	188
125	169	124	188
126	171	125	189
127	172	126	190
128	173	127	191
129	175	128	191
130	176	128	192
131	177	129	193
132	179	130	194
133	180	131	194
134	181	132	195
135	183	132	196
136	184	133	196
137	185	134	197
138	187	135	198
139	188	136	199
140	189	136	199
141	191	137	200
142	192	138	201
143	194	139	201
144	195	140	202
145	196	140	203
146	198	141	204
147	199	142	204
148	200	143	205
149	202	144	206
150	203	144	206
151	204	145	207
152	206	146	208
153	207	147	209
154	208	148	209
155	210	148	210
156	211	149	211
157	212	150	212
158	214	151	212
159	215	152	213
160	217	152	214
161	218	153	214
162	219	154	215
163	221	155	216
164	222	156	217
165	223	157	217
166	225	157	218
167	226	158	219
168	227	159	219
169	229	160	220
170	230	161	221
171	231	161	222
172	233	162	222
173	234	163	223
174	235	164	224
175	237	165	225
176	238	165	225
177	240	166	226
178	241	167	227
179	242	168	227
180	244	169	228
181	245	169	229
182	246	170	230
183	248	171	230
184	249	172	231
185	250	173	232
186	252	173	232
187	253	174	233
188	254	175	234
189	256	176	235
190	257	177	235
191	258	177	236
192	260	178	237
193	261	179	237
194	263	180	238
195	264	181	239
196	265	181	240
197	267	182	240
198	268	183	241
199	269	184	242
200	271	185	243

[johnnyenglish]

These are very helpful.