grue (OP)
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March 12, 2011, 05:54:24 PM |
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What's the most important factor that determines a card's hashing ability? From what i heard, it's based on the amount of shaders. is that correct? what about core clock?
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In order to get the maximum amount of activity points possible, you just need to post once per day on average. Skipping days is OK as long as you maintain the average.
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Dude65535
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March 12, 2011, 06:01:39 PM |
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shaders, clock speed and chip design are the determining factors
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1DCj8ZwGZXQqQhgv6eUEnWgsxo8BTMj3mT
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Cryptoman
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March 12, 2011, 06:06:28 PM |
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On a related note, does anyone know how many integer operations are necessary to compute one hash?
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"A small body of determined spirits fired by an unquenchable faith in their mission can alter the course of history." --Gandhi
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os008
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March 12, 2011, 06:44:37 PM |
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Interesting question. I made a quick calculation ...
5850 -> 300 MH/s -> 2.5 TFLOPs
2,500,000,000 / 300,000,000 = 8.33 OPs
I'd say 9 OPs. Someone here who has more expertise in this, please provide some feedback.
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2x5850 @ 600[M|K]H/s
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Beremat
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YGOLD is a Defi platform
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March 12, 2011, 06:52:43 PM |
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Interesting question. I made a quick calculation ...
5850 -> 300 MH/s -> 2.5 TFLOPs
2,500,000,000 / 300,000,000 = 8.33 OPs
I'd say 9 OPs. Someone here who has more expertise in this, please provide some feedback.
4850 -> 75MH/s -> 1TFLOP 1,000,000,000 / 75,000,000 = 13.333 It's probably dependent on core architecture as well.
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Meni Rosenfeld
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March 12, 2011, 07:11:22 PM |
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FLOPs are floating point operations per second, so I don't think they're what we're supposed to look at.
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ArtForz
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March 12, 2011, 07:13:47 PM |
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off-by-3-orders-of-magnitude. HD5xxx needs about 4150 integer operations per hash HD4xxx and nvidia 2/4/5xx about 6350 integer operations. for all current architectures integer ops/second = number of shader ALUs * clock. so a 5870 at 1600 ALUs * 850MHz = 1360000M intops/second, / 4150 = ~ 327.7Mh/s 4870: 800 * 750M / 6350 = ~ 94.5 Mh/s GTX580: 512 * 1544M / 6350 = ~ 124.5Mh/s etc... usually published FLOPS numbers are simply intops * 2 (one muladd counts as 2 operations).
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os008
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March 12, 2011, 07:29:54 PM |
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HD5xxx needs about 4150 integer operations per hash Thank you for the explanation. usually published FLOPS numbers are simply intops * 2 (one muladd counts as 2 operations). Wouldn't that mean ATi is much superior to nVidia in FLOPs; contrary to the reality? Don't you mean FLOPs = INTOPs / 2 ?
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2x5850 @ 600[M|K]H/s
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Garrett Burgwardt
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March 12, 2011, 07:38:04 PM |
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FLOPS are completely irrelevant, since the hashing algorithm uses fixed point calculations.
You could not be more wrong by looking at the FLOPS rating of a card.
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os008
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March 12, 2011, 08:14:36 PM |
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There is still a correlation between FLOPS and Integer operations. That's what i would like to know; what's the equation to convert between them?
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2x5850 @ 600[M|K]H/s
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ArtForz
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March 12, 2011, 08:27:49 PM |
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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!
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gigabytecoin
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March 12, 2011, 08:57:13 PM |
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FLOPS are completely irrelevant, since the hashing algorithm uses fixed point calculations.
You could not be more wrong by looking at the FLOPS rating of a card.
Ok, so where are the FPOPS ratings?!
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apofis
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March 12, 2011, 09:11:36 PM |
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grue (OP)
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March 14, 2011, 03:03:10 PM |
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thanks for all the input guys.
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