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Title: 2x6870($300) VS 1x6970($300) Post by: newguy05 on January 18, 2012, 08:29:49 PM will run everything at stock. which is better for mining? they cost about the same. Thanks
2x6870 ($300) or 1x6970($300) Title: Re: 2x6870($300) VS 1x6970($300) Post by: jjiimm_64 on January 18, 2012, 08:32:37 PM will run everything at stock. which is better for mining? they cost about the same. Thanks 2x6870 ($300) or 1x6970($300) if not for the fact that one deal uses 2 slots, and the other one. 6870 will get you about 290 Mh that is 580 Mhsh 6970 is about 400-410 Title: Re: 2x6870($300) VS 1x6970($300) Post by: Enigma81 on January 19, 2012, 07:45:00 AM 290MH on a 5870? Seriously? I get over 430 from 5850s.
Title: Re: 2x6870($300) VS 1x6970($300) Post by: ArtForz on January 19, 2012, 09:29:57 AM 290MH on a 5870? Seriously? I get over 430 from 5850s. *6*870. Probably stock clocks or a suboptimal miner with a very mild OC.And 430Mh/s from 5850s? That's ~1GHz core. Wonder how long they'll last... Title: Re: 2x6870($300) VS 1x6970($300) Post by: Enigma81 on January 19, 2012, 04:57:21 PM 930 core. under 70C.
Title: Re: 2x6870($300) VS 1x6970($300) Post by: ArtForz on January 19, 2012, 05:15:02 PM 930 core. under 70C. 430Mh/s at 930 core on a 58*50*?That'd be 335Mh/s stock. On a 5850. Or 436Mh/s on a stock 5870. So... why is everyone else reporting numbers *way* below that? Title: Re: 2x6870($300) VS 1x6970($300) Post by: bulanula on January 19, 2012, 05:25:02 PM 930 core. under 70C. 430Mh/s at 930 core on a 58*50*?That'd be 335Mh/s stock. On a 5850. Or 436Mh/s on a stock 5870. So... why is everyone else reporting numbers *way* below that? ArtForz, how do you calculate these formulas and stuff ? I look and don't understand anything. LOL How do you get the mhash/s value from the core and shaders the card has ? Title: Re: 2x6870($300) VS 1x6970($300) Post by: ArtForz on January 19, 2012, 05:35:33 PM 930 core. under 70C. 430Mh/s at 930 core on a 58*50*?That'd be 335Mh/s stock. On a 5850. Or 436Mh/s on a stock 5870. So... why is everyone else reporting numbers *way* below that? ArtForz, how do you calculate these formulas and stuff ? I look and don't understand anything. LOL How do you get the mhash/s value from the core and shaders the card has ? 430Mh/s / 930MHz / 1440 shaders = 0.000321087 hash/shaderclock 0.000321087 hash/shaderclock * 850 MHz = 272923.95 hash/shadersecond 272923.95 hash/shadersecond * 1600 shaders = 436678320 hash/sec. so to convert, it's generally simply hashrateA / clockA / #shadersA * clockB * #shadersB Title: Re: 2x6870($300) VS 1x6970($300) Post by: Enigma81 on January 19, 2012, 06:12:59 PM 930 core. under 70C. 430Mh/s at 930 core on a 58*50*?That'd be 335Mh/s stock. On a 5850. Or 436Mh/s on a stock 5870. So... why is everyone else reporting numbers *way* below that? Not sure why everyone else is so low - or why I'm so high.... Here's a screen-shot showing the Device Hardware ID's (5850), MSI Afterburner Settings, and Mining Results. (EDIT)Hmm.. In taking that screen-shot, I see I'm running a bit warm today.. 74C.. Have to check on my fan. Also, screenshot shows 427.xx Mhash/sec which was primarily due to me moving images around on the screen - my rate dropped by a few Mhash while I was doing that and taking the capture. It's usually about 431.xx if I leave the machine alone. http://i44.tinypic.com/73ij5k.jpg Title: Re: 2x6870($300) VS 1x6970($300) Post by: jjiimm_64 on January 19, 2012, 06:33:06 PM snip Yup.. looks like you have a 5870 there clocking away at the normal 430Mh at 930 clock. Title: Re: 2x6870($300) VS 1x6970($300) Post by: Enigma81 on January 19, 2012, 06:44:14 PM Hmm.. You might be right, actually.. I remote-desktop into that machine.. maybe it got a 5870 stuck in it rather than the 5850 that I thought was in it..
Have to check when I'm over at the facility where that box lives later this afternoon.. Title: Re: 2x6870($300) VS 1x6970($300) Post by: ArtForz on January 19, 2012, 06:48:49 PM snip Yup.. looks like you have a 5870 there clocking away at the normal 430Mh at 930 clock.Honestly not sure WTF to make of that, all I get is "congratulations, you're the proud owner of a 5850 with 1600 enabled shaders." Title: Re: 2x6870($300) VS 1x6970($300) Post by: Enigma81 on January 19, 2012, 06:52:08 PM Just ran GPU-Z.. 1440 shaders.. It's a 5850 like I thought.
http://www.techpowerup.com/gpuz/47rdp/ Title: Re: 2x6870($300) VS 1x6970($300) Post by: jjiimm_64 on January 19, 2012, 06:56:19 PM hmmm, interesting.. well, it sure is hashing exactly like a 5870 would.... maybe a 5870 with a 5850 bios? i dunno. if is look like a duck and quacks like a duck! Title: Re: 2x6870($300) VS 1x6970($300) Post by: ArtForz on January 19, 2012, 07:04:00 PM Just ran GPU-Z.. 1440 shaders.. It's a 5850 like I thought. Well, iirc GPU-Z shader # is simply based off a hardcoded table of device IDs, so that's no big help either.http://www.techpowerup.com/gpuz/47rdp/ Atm I'm out of ideas of how to figure out what is really going on there, just seems *very* odd that your 5850 is 11% faster than what everyone else is reporting, and 111% just happens to be very close to 1600/1440. Title: Re: 2x6870($300) VS 1x6970($300) Post by: jjiimm_64 on January 19, 2012, 07:12:44 PM Yup, just call it a 5870 and move forward.... I have some 7970's here in a box, cant wait to get them home :) Title: Re: 2x6870($300) VS 1x6970($300) Post by: ArtForz on January 19, 2012, 07:28:15 PM Now, after massive thread derailment... back to OPs question.
stock vs. stock 2*6870 easily beats 6970. 2*~290 = ~580 vs. ~390 for a 6970. Title: Re: 2x6870($300) VS 1x6970($300) Post by: jjiimm_64 on January 19, 2012, 08:56:20 PM Now, after massive thread derailment... back to OPs question. stock vs. stock 2*6870 easily beats 6970. 2*~290 = ~580 vs. ~390 for a 6970. agreed and as originally said, if slots are not at a premium Title: Re: 2x6870($300) VS 1x6970($300) Post by: newguy05 on January 20, 2012, 12:40:05 AM thanks guys, i ordered 2x 6870. Hope they dont freeze my pc every 24 hours like my old 5970 did.
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