Mining power of Bitcoin vs other networks - page 2.

casascius

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Quote from: ArtForz on March 21, 2011, 03:39:59 AM

5.8 petaflops, or 5800 teraflops...
on pretty much all recent archs with vector units, one 32-bit INTOP = 2 single precision FLOP
one bitcoinhash is ~6.35k x86 INTOP
450G hash/s * 6.35k INTOP/hash = 2858T INTOP/s
2858T INTOP/s * 2 FLOP/INTOP = ~6700T FLOP/s

I lost you at 2858*2~=6700 (correct answer 5716, closer to your 5800, simple typo?)

ArtForz

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5.8 petaflops, or 5800 teraflops...
on pretty much all recent archs with vector units, one 32-bit INTOP = 2 single precision FLOP
one bitcoinhash is ~6.35k x86 INTOP
450G hash/s * 6.35k INTOP/hash = 2858T INTOP/s
2858T INTOP/s * 2 FLOP/INTOP = ~6700T FLOP/s

casascius

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Quote from: gigabytecoin on March 21, 2011, 02:44:08 AM

How did he calculate 5,800 petaflops? Bitcoincharts.com shows we are at 500 giga hashes per second as an entire network. Isn't a hash roughly ~5 flops? Which would put us at about 2.5 tera flops.

I would say a hash is more like in the low 4 digits (thousand(s)) of ops, just seeing the code. Definitely not 5 or anything similar.

Hashing is mostly elementary integer ops like bit shifts, and are hardly as meaty as floating point ops. Here might be a helpful relation though: for each cluster of 5 alus on a 5970, four mainly do integer ops and simple float ops, and the fifth can do both integer and full floating point including transcendentals (sin,cos,log,exp,etc.) So in the context of 5970s, integer ops and flops may be different. But by no more than a ratio of 5 to 1.

gigabytecoin

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How did he calculate 5,800 petaflops? Bitcoincharts.com shows we are at 500 giga hashes per second as an entire network. Isn't a hash roughly ~5 flops? Which would put us at about 2.5 tera flops.

Stephen Gornick

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Quote from: genjix on March 20, 2011, 01:07:37 AM

Hey,

I'm looking for data and graphs so I can compare Bitcoin to other networks/supercomputers to show to laymans in visual terms how much more powerful our computing power is. It's a good argument in favour of Bitcoin's network rock hardiness.

Numbers comparing Bitcoin hashing rate to Protein@FOLDING and SETI are much welcome.

jgarzik says: ~5800 petaflops whereas F@H = 10 pflops.

Have you seen this?

Quote from: ArtForz on March 12, 2011, 03:27:49 PM

published FLOPS for GTX580: 1581.1G
512 ALUs * 1544 MHz shader clock * 2 (muladd factor) = 1581.056G
published FLOPS for HD5970: 4640G
3200 ALUs * 725MHz * 2 (muladd factor) = 4640G

hey, what a coincidence!

genjix

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Hey,

I'm looking for data and graphs so I can compare Bitcoin to other networks/supercomputers to show to laymans in visual terms how much more powerful our computing power is. It's a good argument in favour of Bitcoin's network rock hardiness.

Numbers comparing Bitcoin hashing rate to Protein@FOLDING and SETI are much welcome.

jgarzik says: ~5800 petaflops whereas F@H = 10 pflops.

Topic: Mining power of Bitcoin vs other networks - page 2. (Read 12759 times)