# [RC5] difference between cuda and stream

Joseph Kaye jkaye at isd.net
Tue Jan 8 12:31:52 EST 2013

```On 1/7/2013 9:58 PM, bert wrote:
> That really doesn't help me any at all,so I am assuming you don't know.
> They should have a page on how many blocks PER day a certain card
> does,posting a keyrate doesn't help any.
>
> Bert

Bert,

I think I see now - are you using the term "Blocks" from the stats
page?  Because none of the clients use the term "Block", it's rarely
used when comparing speeds from client to client.

If you are using the Blocks from the stats pages, you can figure it our
pretty easily, I think.

From my stats:
Overall            Yesterday
Rank:                55                34(-9)
Percentile:        99.94                98.18
Blocks:          53,307,666            87,373
Blocks/sec:         0.167                1.011
Keys:     228,954,682,096,091,136    375,264,177,553,408
Keys/sec:     718,529,949             4,343,335,388
Time Working:     3,688 days

Then just do the math:

375,264,177,553,408 keys is about 87373 blocks.

*375,264,177,553,408 / 87373 = 4294967296*

So 1 block is about 4294967296 keys

If a GTX690 does about 64,000 blocks a day, then:

*64000 * 4294967296 = 274877906944000 *

To get the key rate for that number of blocks a day:

*274877906944000 / 24 = 11453246122666.67*

gives you 11453246122666.67 keys per hour

*11453246122666.67 / 60 = 190887435377.7778*

gives you 190887435377.7778 keys per minute

*190887435377.7778 / 60 = 3181457256.296296*

finally gives us 3181457256.296296 keys per second, or rounded out to
3.2 MKeys/sec

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