Hello i am using a GTX 670 and a GT 640.

Now i watched my cpu load, and its all full load of both cores.

Is it better to run with SWAN_SYNC = 0 and install a Q6600 for

example ?

Greets :)

I don't think SWAN_SYNC works with the new app.
A Q6600 CPU is better than a 6300, if that's what you mean?
I'm a bit surprised that a Q6600 would struggle to support your cards, if the CPU is doing nothing else. An i7-2600 is about twice as powerful as a Q6600.
DDR2 might not help, but there might be PCIE bus issues. What motherboard is it?

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I don't think SWAN_SYNC works with the new app.

This is a question, I'm also interesting in.

My PC's with GTX5xx and CUDA42 do not use SWAN_SYNC, but my PC with GTX680 and CUDA42 consumes 1CPU per GPU as SWAN_SYNC do.

Can I disable SWAN_SYNC in general or is there any speed improvement?

cpu load at 53% with the q6600

Nvidia Inspector shows PCIe 1.1 capability
GPU-Z shows PCIe 2.0 capability

For the ASUS GTX 670 DCII , i think there is no reason to overclock !?
The card do that itself, very useable running times abot 5 to 5 and a half
hours running time at LR Paola WUs.

CPUZ will tell you the motherboard name.

There is little point overclocking it, especially if the board turns out to be PCIE1.1.

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Its the Asus P5N-D , old SLI one. Asus says PCIe 2.0