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148
votes
15answers
19k views

Is the performance of a CPU affected as it ages? [closed]

This is a hypothetical question about how a CPU operates. If I purchase two identical CPUs, and use one long term (say one year), will it be identical in speed to the unused CPU? Will the number of ...
68
votes
9answers
11k views

What's the difference between mobile and desktop processors?

I just read about the new Samsung Galaxy Note Edge having a 2.7GHz quad-core processor and 3gb of Ram. The laptop I bought last year by HP is 4 Gb of ram and 2.3GHz quad-core and my iMac is even ...
54
votes
4answers
4k views

Why do some old games run much too quickly on modern hardware?

I've got a few old programs I pulled off an early 90s-era Windows computer and tried to run them on a relatively modern computer. Interestingly enough, they ran at a blazing fast speed - no, not the ...
31
votes
7answers
10k views

Has CPU speed already broken Moore's law?

I remember sometime around 1995 having a computer with CPU speed of 75 MHz. Then a couple of years later around 1997 having one that was 211 MHz. Then a few years later around 2000 having one that ...
25
votes
7answers
2k views

Why are modern CPUs “underclocked”?

I keep reading since years about magical overclockability of modern CPUs. It is said that CPUs (with open multiplier) which are shipped to customers with (let's say) preset 3GHz, can be overclocked ...
16
votes
10answers
2k views

Why aren't all CPUs 'overclocked' as a factory default? [duplicate]

Possible Duplicate: Why are modern CPUs “underclocked”? When I was searching around for a desktop awhile back I came across a lot of discussions where techies talked about ...
9
votes
4answers
17k views

How to get an ARM CPU clock speed in Linux?

I have an ARM-based embedded machine based on S3C2416 board. According to the specifications I have available there should be a 533 MHz ARM9 (ARM926EJ-S according to /proc/cpuinfo), however the ...
6
votes
4answers
897 views

What affects installation speed?

Super hardware noob here. My wife and I were installing a game on our laptops last night, from an installation file (not a disc). The game takes up about 7.6GB of HD space. My laptop installed the ...
6
votes
5answers
1k views

Can keeping my CPU speed at “high performance/turbo” all the time decrease its lifespan?

Can keeping my CPU speed at “high performance/turbo” all the time decrease its lifespan? And if so, what would be its expected route of failure if it does happen?
4
votes
1answer
3k views

Is it possible to down-clock a laptop CPU?

Is it possible to down-clock a laptop CPU, i.e. make it slower? Rationale: I’d like to save battery power and generate less heat. My laptop is an HP Compaq 6715b running Windows 7 Professional SP1, ...
4
votes
3answers
3k views

Processor always at max speed

I am running Windows 8 Pro on an Apple MacBook Pro 9,1 Mid 2012 15 inch non retina. It has a Core i7-3720 QM CPU @ 2.6 GHz. For the past few days, I have noticed that it is constantly running at max ...
4
votes
2answers
665 views

What does the file /proc/cpuinfo tell me about the hardware?

I rent a server which should have "2 Cores x 2,2 GHz". When in run the command cat /proc/cpuinfo I get the following result: processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : ...
4
votes
2answers
141 views

What should I be looking at in order to speed up a program that needs a lot of processor power and cores?

I want to build a system in order to run one particular specialised program as fast as possible (currently it can take up to 50 hours to do a run on my laptop with an I5-processor). The program is ...
3
votes
3answers
404 views

Is my laptop running slower than it could be?

I have a dual core CPU in my laptop. Supposedly it's supposed to be running at 2 Ghz. When a dual core CPU is said to be running at 2 Ghz, does it mean that each of the cores should be cranking at ...
3
votes
3answers
1k views

Hypothetically, can I swap processors between a smartphone & a desktop?

When manufacturers mention the speeds of smartphone processors, is it right in my understanding that the speeds between smartphone processors and desktop processors are comparable? In other words, ...
3
votes
2answers
5k views

Mobile CPU vs. Ultra-low voltage CPU: performance [closed]

I'm choosing a new laptop and one of the questions is a type of CPU — mobile or ultra-low voltage. If to be more precise, I'm torn between two models of Intel Core i5 — i5-2410M (Sandy Bridge) and ...
3
votes
2answers
369 views

How to run the CPU at something like 75%?

My notebook is too old for me to invest into a new fan (it will simply be replaced by a new one when the final heat death occurs), but when it runs on full speed I feel like sitting in front of a ...
3
votes
1answer
41 views

Why is my CPU running slower than it should be?

I have an AMD FX(tm)-6100 Six-core processor that should run at 3.30 GHz, however upon trying to overclock the processor (which I never got around to doing) I have found that it is running at 1.4 GHz ...
2
votes
4answers
3k views

Multi-core CPU: can I say I have a 3x2.1GHz=6.3GHz CPU?

I have an AMD A6-3500 three-core CPU. AMD System Monitor shows each core with a maximum 2100 MHz. This also shows in AMD OverDrive. Does this processor run at the speed 3*2100 MHz? Edit Can I say ...
2
votes
3answers
735 views

Multi-core processor speed

Might be a basic question: is the clock rate (1.7 GHz, etc.) that is mentioned for multi-core processors (e.g., Intel i5, i7) the clock rate per core, or it is the total speed of all cores combined?
2
votes
2answers
320 views

Clock Speed and other factors

I hear almost everywhere that CPU clock speed is not the only factor that defines the true speed of a CPU. Well. What are the other factors then? In which case a processor clocked at 1.6 Ghz is faster ...
2
votes
3answers
2k views

How is CPU clock rate maintained?

I was reading an article Clock rate from wikipedia which has to say that: The clock rate typically refers to the frequency that a CPU is running at. The clock rate of a CPU is normally ...
2
votes
2answers
206 views

Usefulness of multi-core in the context of power-efficient computing

I'm considering options for a new portable PC. I'd like to keep power utilization at a minimum, while being able to run batch jobs as quickly as possible. Batch jobs I can generally parallelize ...
2
votes
1answer
88 views

Is there a noticeable increase in computer performance moving from a Dual Core to an i5?

I have an i5-3470 3.2Ghz and 6GB or RAM. I also have a Dual Core E5700 3.0 and 8GB or RAM. Both use Windows 7 Pro. I am currently using the latter. I would like to use the i5, but as a developer, ...
2
votes
2answers
3k views

what is the difference/similarity between MIPS and FLOPS?

I believe both MIPS and FLOPS are metrices for calculating processor speed. What is the difference between them? Are they in any way related or dependent on each other?
2
votes
2answers
3k views

How to compare Intel and AMD Processors when different sites give such different rankings?

How can I get reliable information on the actual speed in practice of different processors? For example, I'm comparing 2 laptops with these processors: Intel Core i3-2310M AMD A6-3400M According ...
2
votes
1answer
253 views

How can I monitor CPU frequency on Linux servers?

At low CPU frequency, latencies can be higher or we may come to some wrong conclusions related to server capacity. Knowing the CPU frequency is important for high performance scenarios. In case of ...
2
votes
0answers
76 views

Utilizing the full power of my workstation

I am not a gamer. Used to be, 10+ years ago. My workstation is strictly for business: Quickbooks Excel Access General Business QuickBooks is tied to a synchronization engine that is synchronizing, ...
2
votes
0answers
36 views

Back of the envelope calculation for speed of matrix multiplications [closed]

I'm trying to develop an intuition for how feasible/scalable machine learning algorithms are. The dominant cost is always matrix multiplications, but there seem to be no readily Google-able resource ...
2
votes
0answers
2k views

How to adjust Turbo Boost Ratios on Mac?

My ratios are set to 0035 on my 2012 13" Macbook Air. In its specs it says that it can be boosted up to 2.8 Ghz. With my current ratios only 2.3Ghz is possible. Basically I'm wondering how I can ...
2
votes
2answers
951 views

How to change PC clock speed for individual programs?

We have some older programs (no source code anymore) that run too fast on CPUs with faster clock speeds. I'm guessing that they were written using software delays ('X' number of CPU instructions per ...
1
vote
1answer
168 views

Can I run a Pentium 4 on 100% for an extended amount of time?

I want to use my Pentium 4 desktop for running some heavy simulations. These simulations take from two to eight hours. Is it safe to run the CPU at 100% for such a long time?
1
vote
3answers
4k views

How speed and frequency of a processor are related to each other? [closed]

I think that clock rate of processor determines the speed of core, in my case it is 1.86GHz. But If I am not wrong, it also determines that how much energy it will consume. If you have more frequency ...
1
vote
2answers
904 views

Processor remains underclocked even under load

My Core 2 Duo T7200 (nominal frequency 2 GHz) is constantly running at 1000 MHz. Here's an exerpt from /proc/cpuinfo: vendor_id : GenuineIntel cpu family : 6 model : 15 model ...
1
vote
1answer
2k views

How are GHz in multicore processors computed? [duplicate]

Possible Duplicate: How fast is each core in a dual-core processor? I am debating between two systems (for simplicity): (1) 2.9 GHz dual core processor (2) 2.3 GHz quad core processor ...
1
vote
3answers
12k views

Why is my CPU speed lower than it should be?

I have an Intel Core 2 Duo E6400 that should run at 2.13 GHz but when I boot my computer, the BIOS shows a CPU speed of just 1.6 GHz (I removed the BIOS/motherboard logo screen so I can see the ...
1
vote
1answer
658 views

Performance and Battery Life

Okay, I'm looking for hard evidence to settle an argument. From a developers perspective, the argument of CPU usage and battery life comes into play often. If a CPU is throttled to use 10% of its ...
1
vote
1answer
125 views

CPU heating too much, cpufrequtils to limit its speed works weird

I am using an Intel i5 powered laptop and my OS is a 64 bit Linux Mint 14, kernel version 3.5.0-43. Up until now the CPU usage policy was ondemand and it usually was working at 2.40Ghz. In this setup ...
1
vote
1answer
5k views

Change CPU Clock Speed from Windows

How can I change the CPU clock speed of my computer? It is a Dell Inspiron 5720 laptop, running Windows 8.1 Pro. In Linux, I know there are ways of doing this from the operating system itself, instead ...
1
vote
1answer
716 views

Overclocked Intel Core 2 Duo E4300, what now?

I have overclocked Intel® Core™2 Duo Processor E4300 CPU. I changed FSB from 200 to 220. Multiplier is x9. The old core speed was 9 x 200 = 1800 GHz. Now it's 1980 GHz. I runed memtest to 20 passes ...
1
vote
1answer
433 views

cpufreq policy acting weird, current policy max gets throttled

I'm using laptop-mode and the ondemand governor. When I do cpufreq-info I get analyzing CPU 0: driver: acpi-cpufreq CPUs which run at the same hardware frequency: 0 1 CPUs which need to have ...
1
vote
0answers
54 views

Windows 7 - Acer Aspire M5811

I have a problem with my Windows 7 Desktop PC. Today I used it normally and it turned off normally to, but the next time I tried to turn it on, it became extremely slow. It's normal until I need to ...
1
vote
0answers
268 views

How do I underclock my Macbook AIR?

When my MacBook gets below 1% battery life I believe the CPU slows down. The battery indicator states I have 10 minutes left but those are the longest 10 minutes in the laptop cycle. Is there a way to ...
1
vote
0answers
66 views

Percentage cpu use for a particular job decreases over time in Windows 7

I have a multi-core workstation running Windows 7. When I submit a job to run on 12 cores, things go fine, but after some time the percent of the cpu the job occupies decreases from ~30% to 3% even ...
1
vote
0answers
2k views

Should I prefer processor speed (GHz) or core count? [closed]

I'm currently in the market for a new computer, so I'm curious about the recent trends of processor speed versus core count. Core count seems to be 'all the rage' these days, but things are really ...
0
votes
4answers
173 views

processor speed with HDD

I have been doing some research to buy a laptop for software development. I have been told by one of my co-worker that having a processor over 2.2 GHz with 7200 RPM HDD makes no sesne. He said that ...
0
votes
1answer
1k views

RAM speed slower than CPU speed - Why?

On the specs of a computer I saw, it said the CPU speed was 2.something Gigahertz, but the RAM speed was 1300MHz (1.3GHz). That does not make sense, why would the RAM be slower than the CPU? You could ...
0
votes
1answer
342 views

What does cpu MHz mean in /proc/cpuinfo?

I own Quad-core Core i5 laptop. I got curious to know how much time it takes for my laptop to execute a simple instruction. So, I did cat /proc/cpuinfo. Below is the relevant portion of it, model ...
0
votes
2answers
425 views

Using Server CPU for Desktop Applications

Though it's a n00bish question I haven't found any clear answer anywhere even after long days of googling. Recently I am planning to use an AMD Opteron Quad Core 2350 for my home lab. I'll not run it ...
0
votes
2answers
36 views

How are CPUs so freakin fast

I am going through a book on C and it said "Write a program that counts from 1 to 300 million, printing the number only if it is a multiple of 100 million. Use a stopwatch for fun to time the ...