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Author Topic: Anyone tried a VIA QuadCore for mining?  (Read 1929 times)
Dhomochevsky
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June 28, 2012, 01:59:51 AM
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http://www.via.com.tw/en/products/processors/quadcore/index.jsp

It seems it has hardware support for SHA256. Any idea on performance?
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rjk
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June 28, 2012, 02:02:23 AM
 #2

http://www.via.com.tw/en/products/processors/quadcore/index.jsp

It seems it has hardware support for SHA256. Any idea on performance?
Only recently did it become available on a motherboard, but I'm not interested in the formfactor that it became available on. However, the Quad Core is simply 2 Dual Core chips on one package, so testing a Dual Core should get some close numbers.

I do have a Dual Core (Zotac ZBOX NANO based on the VX900H chipset), so maybe I'll test it sometime.

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June 28, 2012, 03:37:56 AM
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http://www.via.com.tw/en/products/processors/quadcore/index.jsp

It seems it has hardware support for SHA256. Any idea on performance?
Only recently did it become available on a motherboard, but I'm not interested in the formfactor that it became available on. However, the Quad Core is simply 2 Dual Core chips on one package, so testing a Dual Core should get some close numbers.

I do have a Dual Core (Zotac ZBOX NANO based on the VX900H chipset), so maybe I'll test it sometime.

This makes it sound like it's got specific instructions or features for SHA256, sort of like SB's Quick Sync for video encoding.

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goxed
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June 28, 2012, 03:53:43 AM
 #4

http://www.via.com.tw/en/products/processors/quadcore/index.jsp

It seems it has hardware support for SHA256. Any idea on performance?
Only recently did it become available on a motherboard, but I'm not interested in the formfactor that it became available on. However, the Quad Core is simply 2 Dual Core chips on one package, so testing a Dual Core should get some close numbers.

I do have a Dual Core (Zotac ZBOX NANO based on the VX900H chipset), so maybe I'll test it sometime.

This makes it sound like it's got specific instructions or features for SHA256, sort of like SB's Quick Sync for video encoding.
From http://www.via.com.tw/en/downloads/whitepapers/processors/WP080529VIA_Nano.pdf

The VIA Nano provides two of the most commonly used, SHA-1 and SHA-256, which are able to encrypt information at rates of up to 5 gigabits/sec.

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June 28, 2012, 05:06:14 AM
 #5

The VIA Nano provides two of the most commonly used, SHA-1 and SHA-256, which are able to encrypt information at rates of up to 5 gigabits/sec.

So that turns out to be a whopping 10 MH/s?

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June 28, 2012, 02:21:43 PM
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The VIA Nano provides two of the most commonly used, SHA-1 and SHA-256, which are able to encrypt information at rates of up to 5 gigabits/sec.

So that turns out to be a whopping 10 MH/s?

Hey, that's not bad for a CPU  Grin

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June 29, 2012, 01:26:15 AM
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The VIA Nano provides two of the most commonly used, SHA-1 and SHA-256, which are able to encrypt information at rates of up to 5 gigabits/sec.

So that turns out to be a whopping 10 MH/s?
Is that per core? Those things only use like 5 watts or something.

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crazyates
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June 29, 2012, 01:28:27 AM
 #8

The VIA Nano provides two of the most commonly used, SHA-1 and SHA-256, which are able to encrypt information at rates of up to 5 gigabits/sec.

So that turns out to be a whopping 10 MH/s?
Is that per core? Those things only use like 5 watts or something.


27W for the full quad core.

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rjk
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June 29, 2012, 01:31:41 AM
 #9

The VIA Nano provides two of the most commonly used, SHA-1 and SHA-256, which are able to encrypt information at rates of up to 5 gigabits/sec.

So that turns out to be a whopping 10 MH/s?
Is that per core? Those things only use like 5 watts or something.


27W for the full quad core.
Oh zing, those things are power hogs then. The dual cores I have actually are rated TDP of 17 watts I think, but they are also underclocked compared to the single core units (1Ghz instead of 1.2Ghz)

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BoardGameCoin
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June 29, 2012, 01:55:48 AM
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So, I'm curious how fast these could go. the 10 MH/s above seems to be based on a (5 Gb/s) / (32 * 8 bits per sha256 hash) / (2 hashes per block hash)

Based on the following diff adding padlock support to openssl, it seems the instruction takes a round count. If the round count reduces memory pressure, perhaps the 2 hashes would take roughly the same time as one. This suggests that perhaps one of these quad cores could do up to 80 MH/s. 

http://www.logix.cz/michal/devel/padlock/kernel-sha/padlock-sha-complete.diff

Of course this is all speculation. If someone has one of these to borrow I'd play around with it and see what I could get out of it. Even 80 MH/s is nothing significant. But I'm curious...

-bgc

I'm selling great Minion Games like The Manhattan Project, Kingdom of Solomon and Venture Forth at 4% off retail starting June 2012. PM me or go to my thread in the Marketplace if you're interested.

For Settlers/Dominion/Carcassone etc., I do email gift cards on Amazon for a 5% fee. PM if you're interested.
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