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In most other respects the quad core 3.4GHz Phenom II X4 965 Black Edition 125W revision remains the same. The architecture is "Deneb", the socket is AM3 and the CPU still
features 6MB of shared L3 and 512KB of L2 cache for each of the four cores.
81% Rating: 
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AMD henom II X4 965 Black Edition C3 |
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Core-by-Core System Power Draw
To determine how much power
multi-core processors draw, PCSTATS will be measuring total power consumption
what the CPU is in idle and several CPU-stressed states. To get an accurate
measurement, it's necessary to disable power saving and CPU clock speed
throttling technologies like Cool 'n' Quiet, EIST (speedstep) and hardware C1E
power states.
To simulate single-core load a
program called Stress Prime (SP2004) is used. PCSTATS set about stressing each
processor from one to all cores. The SP2004 program is multi-threaded, allowing
individual CPU cores to be stressed by each instance of the program. Total
system power consumption was read with the Extech Power Analyzer Datalogger
(model 380803). The Extech Power Analyzer is located between the main 120AC
supply and the PC's power supply. Given that motherboards vary across these test
systems this is not a "true" measure of CPU power draw alone, but rather a
measurement of the total computer system power draw, which we can compare for
each specific platforms between the CPU idle and CPU stressed states.
Phenom II X4 965 Black Edition - Now just 125W!
AMD's
original Phenom II X4 965 Black
Edition had a TDP of 140W, which translated into some outright scary power consumption
numbers under load. AMD has hauled its flagship processor back into the
lab, and with a bit of tinkering has managed to get its overall power draw down
to 125W, saving countless carbon footprints in the midst. It's time to see how much
real-world effect these changes have made.
| Total System Idle Power
Draw |
| Processor |
Total System
Power Draw |
| Intel Pentium 4 540 |
   150 Watts |
| Intel Pentium D 840 |
165 Watts |
| Intel Pentium D 940 |
168 Watts |
| Intel Core 2 Duo E6600 |
117 Watts |
| Intel Core 2 Duo E6750 |
123 Watts |
| Intel Core 2 Duo E8400 |
131 Watts |
| Intel Core i5 750 |
124 Watts |
| Intel Core i7 920 |
144 Watts |
| AMD Sempron 3600+ |
   120 Watts |
| AMD Athlon64 4000+ |
163 Watts |
| AMD Athlon64 FX-60 |
127 Watts |
| AMD Athlon64 X2 4800+ |
143 Watts |
| AMD Athlon64 X2 5000+ |
156 Watts |
| AMD Athlon64 FX-62 |
168 Watts |
| AMD Athlon II X2 240e |
122 Watts |
| AMD Athlon II X2 250 |
128 Watts |
| AMD Athlon II X3 435 |
128 Watts |
| AMD Athlon II X4 620 |
130 Watts |
| AMD Phenom II X3 720 |
155 Watts |
| AMD Phenom II X4 955 |
148 Watts |
 AMD Phenom II X4 965 -
125W TDP |
   150 Watts
|
| AMD Phenom II X4 965 - 140TDP
|
154 Watts |
While there's a definite
improvement in the Phenom II X4 965 Black Edition (125W)'s idle power draw
performance, it's still pretty close to the Phenom II X4 965 Black Edition 140W
total system power draw measurement. Intel's main rival is the Core i5 750
processor, that PC system idles at a reasonable 124W.
| Total System Stressed Power
Draw - All Cores/Threads |
| Processor |
Total System
Power Draw (All Cores) |
| Intel Pentium 4 540 |
223 Watts |
| Intel Pentium D 840 (2 Core
) |
240 Watts |
| Intel Pentium D 940 (2 Core
Load) |
253 Watts |
| Intel Core 2 Duo E6600 (2 Core Load)
|
156 Watts |
| Intel Core 2 Duo E6750 (2 Core
Load) |
163 Watts |
| Intel Core 2 Duo E8400 (2 Core
Load) |
158 Watts |
| Intel Core i5 750 (4 Core
Load) |
169 Watts |
| Intel Core i7 920 (8 Thread
Load) |
213 Watts |
| AMD Sempron 3600+ |
148 Watts |
| AMD Athlon64 4000+ |
172 Watts |
| AMD Athlon64 FX-60 (2 Core
Load) |
196 Watts |
| AMD Athlon64 X2 4800+ (2 Core
Load) |
173 Watts |
| AMD Athlon64 X2 5000+ (2 Core
Load) |
207 Watts |
| AMD Athlon64 FX-62 (2 Core
Load) |
235 Watts |
| AMD Athlon II X2 240e (2 Core
Load) |
153 Watts |
| AMD Athlon II X2 250 (2 Core
Load) |
163 Watts |
| AMD Athlon II X3 435 (3 Core
Load) |
183 Watts |
| AMD Athlon II X4 620 (4 Core
Load) |
195 Watts |
| AMD Phenom II X3 720 (3 Core Load)
|
213 Watts |
| AMD Phenom II X4 955 (4 Core
Load) |
236 Watts |
AMD Phenom II X4 965 -
125W TDP
(1 Core
Load) |
176 Watts
|
AMD Phenom II X4 965 -
125W TDP
(2 Core
Load) |
195 Watts
|
AMD Phenom II X4 965 -
125W TDP
(3 Core
Load) |
218 Watts
|
AMD Phenom II X4 965 -
125W TDP
(4 Core
Load) |
243 Watts
|
AMD Phenom II X4 965 - 140W TDP
(4 Core Load) |
264 Watts |
Under load, we finally get to
see the reduced TDP of the Phenom II X4 965 Black Edition (125W) in action.
Overall power consumption has dropped from 264W to a more reasonable 243W, but
on balance that's still a lot of electricity consumption! The revised Phenom II
X4 965 Black Edition 125W is second only to Intel's Pentium D 940 when it comes
to power draw under load, and the Pentium D 940 was able to double as a space
heater in its spare time. When compared to the Core i5 750's 169W total system
power draw, even the 125W TDP Phenom II X4 965 Black Edition still has a long
ways to go.
Over all both the old and new
Phenom II X4 965 Black Edition processors are still pushing total
system power consumption towards the 250W region. Hopefully AMD can get on
the 32nm wagon quickly enough that its future processors will make
it under 100W TDP.
Overclocking is up next, and
you won't want to miss these overclocking results...
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