Show your GFlops: The LINPACK benchmark of processing power

Ever wanted to get an idea of what your brand new microprocessor, or your nicely overclocked one, get you in terms of raw computing/processing power?

Then the LINPACK benchmark is just waiting for you to give it a go.

It was, and somehow still is, the benchmark used for supercomputers, and many of its implementations for Intel and AMD chips are completely free.

A free, light and neat version for personal computers I do use is the IntelBurnTest (last version being 2.54), working for both Intel and AMD CPUs, 32 and 64 bits (x64 recommended). It can be downloaded here (majorgeeks) or here (techspot).

To allow meaningful comparisons, just use the default parameters (including for comparisons between Intel Hyper-Threading on or off settings, which are very welcome), and the code formatting shown below.

NB: although of short duration, the IntelBurnTest LINPACK benchmark will really put your CPU to the test. So be sure to close all other applications, and to have a decent CPU cooler. And don't bother about the frequency displayed, it's really not accurate.


Here are the results of my Intel 5960-X at stock speed (3 GHz):

With Hyper-Threading (HT) on:

Code:

---

----------------------------
IntelBurnTest v2.54
Created by AgentGOD
----------------------------

Processor: Intel(R) Core(TM) i7-5960X CPU @ 3.00GHz
Clock Speed: 3,00 GHz
Active Physical Cores: 16
Total System Memory: 16277 MB

Stress Level: Standard (1024 MB)
Testing started on 18/01/2015 00:23:24
Time (s)                Speed (GFlops)                Result
[00:23:39] 7.644        116.9441                        3.360377e-002
[00:23:54] 7.668        116.5789                        3.360377e-002
[00:24:08] 7.735        115.5608                        3.360377e-002
[00:24:23] 7.785        114.8266                        3.360377e-002
[00:24:38] 7.769        115.0579                        3.360377e-002
[00:24:53] 7.788        114.7701                        3.360377e-002
[00:25:08] 7.815        114.3754                        3.360377e-002
[00:25:22] 7.666        116.6078                        3.360377e-002
[00:25:37] 7.684        116.3240                        3.360377e-002
[00:25:51] 7.684        116.3233                        3.360377e-002
Testing ended on 18/01/2015 00:25:52
Test Result: Success.
----------------------------

---

Mean is 115.7 GFlops.


With HT off:

Code:

---

----------------------------
IntelBurnTest v2.54
Created by AgentGOD
----------------------------

Processor: Intel(R) Core(TM) i7-5960X CPU @ 3.00GHz
Clock Speed: 3,23 GHz
Active Physical Cores: 8
Total System Memory: 16277 MB

Stress Level: Standard (1024 MB)
Testing started on 18/01/2015 01:18:32
Time (s)                Speed (GFlops)                Result
[01:18:43] 5.217        171.3495                        3.156799e-002
[01:18:54] 5.199        171.9320                        3.156799e-002
[01:19:04] 5.207        171.6664                        3.156799e-002
[01:19:14] 5.207        171.6612                        3.156799e-002
[01:19:25] 5.226        171.0563                        3.156799e-002
[01:19:35] 5.211        171.5218                        3.156799e-002
[01:19:46] 5.197        171.9842                        3.156799e-002
[01:19:56] 5.204        171.7635                        3.156799e-002
[01:20:07] 5.209        171.5994                        3.156799e-002
[01:20:17] 5.224        171.1091                        3.156799e-002
Testing ended on 18/01/2015 01:20:17
Test Result: Success.
----------------------------

---

Mean is 171.5 GFlops

Just a 48% increase with HT off... :whistling

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