Evaluation of be quiet! Straight Power E7 CM 680W (80+ Bronze Certified)

[windwithme]

[windwithme]

Re: Evaluation of be quiet! Straight Power E7 CM 680W (80+ Bronze Certified)

Spec of Straight Power E7 CM 680W; Model Name: BQT E7-CM-680W
+12V*4, with a combined current of 52A and a combined output wattage of 624W


Silient Wings, a FDB fan designed by be quiet!, is also specially integrated into E7 series.


The M/B used in this test is GIGABYTE P55A-UD5, a middle-high spec among LGA 1156 sockets.
Through my recent experience, I found out when LGA 1156 was under overclocking mode, it would demand quite a high consumption of +12V.


UD5 is integrated with USB3.0 and the latest MB technology.


Test Platform
CPU: Intel Core i7-870
MB: GIGABYTE P55A-UD5
DRAM: CORSAIR DOMINATOR-GT CMG4GX3M2A2000C8
VGA: GIGABYTE GTX260 OC SLI
HD: CORSAIR CMFSSD-128GBG2D RAID0
POWER: be quiet! Straight Power E7 CM 680W
Cooler: Tuniq Tower 120 Extreme
OS: Windows7 Ultimate 64bit


OS system defaults
CPU 200 X 20 => 4000Mhz
DARM DDR3 2000 CL8 8-8-24 1T


OCCT V3.1.0
POWER SUPPLY mode, Shader Complexity 8


What above is the test platform used in this test. In order to display the status of power consumption during the test,
the consumption data would be obtained from the measurement made by “Power Angle”.

Upon entering the desktop screen of OS system- 225~226W


Active PFC - 0.97~0.98


The test items for the Power Supply in OCCT
i7-870 OC 4GHz, a 4-core CPU with simulated full-loading 4-core HT and a physical speeding up from GTX260 - 681~727W。

Running power supply test item in OCCT
i7-870 OC 4GHz, quad physical cores and quad HT virtual cores run in full speed plus GTX260 SLI 2WAY and GTX260 PhysX - 681~727W

[windwithme]

Re: Evaluation of be quiet! Straight Power E7 CM 680W (80+ Bronze Certified)

Active PFC - 0.99~1.00


The measurement data outputted by Power Angel is only for reference, since its accuracy level is not that high.
Though 3WAY SLI couldn’t be applied to reach an utmost 3D efficiency and hence put the system under a full loading condition during the test,
still, I got an utmost consumption value, 727W, from this test, which could also be considered as a middle/high loading test for 680W.

OCCT test result
CPU temperature fluctuation


System temperature fluctuation


CPU voltage fluctuation
While in standby mode, it was around 1.38V; during full-speed operation, it was around 1.38~1.41V.
The fluctuation range of CPU’s voltage is majorly related to the voltage characteristic of M/B.


3.3V
The utmost value measured was 3.34V; the fluctuation majorly lied in the range of 3.28~3.3V.
The fluctuation rate was around 1.80%.
3.3V


5V
It was around 4.95~5.03V. The fluctuation rate was around 1.59%.


12V
The utmost value measured was 12.48V, majorly covering the rage of 12.03~12.10V. The fluctuation rate was around 3.6%.


The voltage fluctuation rates of Straight Power E7 680W’s 3.3V & 12V were both under 1.8%, which is considered quite a satisfying number.
The fluctuation of 12V started to become less stable after OCCT operated over 10 minutes.
The rate was around 3.6%, a larger fluctuation rate than any other voltages tested. However,
this fluctuation rate still lied inside the range of +-5% required by Intel.
Also, the voltage measured for 12V was not actually the real voltage value.

Here, we used a multimeter for a more accurate result.
While in standby mode, 5Vwas around 5.07V, still a bit higher than that measured by M/B.


While OCCT was operating at full-speed, 5V was around 5.07~5.0V, making almost no difference from that measured in standby mode.


While in standby mode, 12 was around 12.13V, a bit lower than 12.43V measured by M/B.

[windwithme]

[anonemus]

Re: Evaluation of be quiet! Straight Power E7 CM 680W (80+ Bronze Certified)

Thanks for this review, windwithme! I won a be quiet 850W dark power pro PSU a couple of years ago. Build quality was really top notch. Are these available in the US already? Here in Asia?