Oh Brother, What betid to mine Haswell 4770?

[Mark Rose]

Originally Posted by petrw1

OK....so knowing that ... 2 questions:

1. Without opening the box how can I find out what kinds of RAM there is? I don't see it in the Device Manager.

It's very unlikely to be anything faster. Officially only DDR3-1333/1600 are supported. Anything faster would be an overclock.

On Linux, dmidecode gives the memory speed, so there should be some tool on Windows that can give you the same. Apparently CPU-Z can do it.

[kladner]

1. Without opening the box how can I find out what kinds of RAM there is? I don't see it in the Device Manager.

CPUID CPU-Z will tell you for each stick.
EDIT: On my system, 1600 RAM shows a frequency of 800, (taking DDR into account.)

[petrw1]

http://www.mersenneforum.org/showpos...2&postcount=98

Haswell at stock CPU speed and stock memory speed DDR3-1600

Times for LL test on 77000003 (4M FFT):

1 worker: 23.4 ms.
2 workers: 24.1, 24.1 ms.
3 workers: 26.1, 26.5, 26.1 ms.
4 workers: 30.7, 30.7, 30.5, 30.8 ms.

Definitely a slow down but nowhere near what I am seeing.

[axn]

Let me ask the "obvious". Are you running in dual-channel mode?

[petrw1]

Originally Posted by axn

Let me ask the "obvious". Are you running in dual-channel mode?

At the risk of showing my ignorance....how can I tell? Non-invasively...

This is a "borged" work PC so I have no say in the setup.
But since it was built by the company "experts" I have to assume they know enough to do so.

I certainly cannot change the setup.
In fact in general I cannot even install extra software; at least nothing that requires any kind of Admin authority... i.e. nothing like CoreTemp or CPU-Z.

[VictordeHolland]

Are you using the internal HD graphics or is there a dedicated GPU? An internal graphics might also use some mem bandwidth.

[Mark Rose]

Originally Posted by VictordeHolland

Are you using the internal HD graphics or is there a dedicated GPU? An internal graphics might also use some mem bandwidth.

I use the internal graphics while running three cores without problem.

[petrw1]

Originally Posted by VictordeHolland

Are you using the internal HD graphics or is there a dedicated GPU? An internal graphics might also use some mem bandwidth.

Has to be internal Graphics; they would not install GPUs here.

[Mark Rose]

Originally Posted by petrw1

At the risk of showing my ignorance....how can I tell? Non-invasively...

This is a "borged" work PC so I have no say in the setup.
But since it was built by the company "experts" I have to assume they know enough to do so.

I certainly cannot change the setup.
In fact in general I cannot even install extra software; at least nothing that requires any kind of Admin authority... i.e. nothing like CoreTemp or CPU-Z.

Actually, there's a very simple way to tell: open the case and count the memory sticks. If you only one stick it's single channel. If there are two sticks immediately beside each other (no empty slots), it's dual channel.

[kladner]

1. Without opening the box how can I find out what kinds of RAM there is?

.

[Mark Rose]

Originally Posted by kladner

.