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Title: Graphics Cards Post by: sang on June 13, 2011, 02:02:14 AM So I did some research the past few days and have created a small matrix of card price vs mhash.
The mhash speeds were taken from the hardware matrix here: https://en.bitcoin.it/wiki/Mining_hardware_comparison Power draw figures were taken from here: http://en.wikipedia.org/wiki/Comparison_of_AMD_graphics_processing_units Prices are generally before tax/shipping and most of the prices came from Newegg. This was compiled during the first week of June 2011. Card | Price | Speed per $ | Speed | Power-draw 5770 @ $95 = $0.44/mhash 215 108w 5830 @ $110 = $0.36/mhash 300 175w 5850 @ $200 = $0.64/mhash 315 151w 5870 @ $500 = $1.25/mhash 400 188w 6750 @ $100 = $0.60/mhash 165 86w 6770 @ $95 = $0.52/mhash 180 108w 6850 @ $150 = $0.65/mhash 230 127w 6870 @ $165 = $0.55/mhash 300 150w 6950 @ $220 = $0.58/mhash 375 200w 6970 @ $310 = $0.82/mhash 375 250w 6990 @ $750 = $1.00/mhash 750 375w Given the results of this data and shopping around for a few days, I am buying a few 6870's since the 5830's are no longer to be found :-) I chose the 6870 over some of the lesser cards mostly due to possible resell value and re-purposing for my gaming rig. Title: Re: Graphics Cards Post by: Basiley on June 13, 2011, 02:09:58 AM weird[big. esp for 5870 :P] prices for 58x0 and overrated performance[numbers ok only for overclocked units], esp for 5830.
Title: Re: Graphics Cards Post by: smoki on June 13, 2011, 02:15:08 AM A few adjustments:
- 5870 will do close to 440 MH/s at 1 GHz gpu clock. Not many will do that without a slight voltage increase - 5850 can do up to 400 Mh/s at 1 GHz gpu clock. That will usually require a voltage bump, which brings power consumption very near 5870 levels. At a more modest gpu overclock of 900 MHz, it will do about 350 Mh/s - 5830 power consumption is usually nearer 5850 level, around 160-165 W - 5770 and 6770 are the same gpu so all the numbers should be the same - 6950 can hit 6970 MH/s numbers only with unlocked shaders. That also brings power consumption right up to 6970 level. Title: Re: Graphics Cards Post by: Basiley on June 13, 2011, 02:18:43 AM can we separate "with overclocking" results into another table ? for reference.
and add PSU requirements with Amps rating. Title: Re: Graphics Cards Post by: sang on June 13, 2011, 02:21:42 AM Re: Overclocked numbers
I used an mhash number I figured was realistic. Im getting 300mhash/s on all my 5830s without voltage mods. When I couldnt decide on a figure I usually just picked something in the middle of the results on the hardware comparison page. Feel free to take my figures and adjust guys :-) Title: Re: Graphics Cards Post by: Basiley on June 13, 2011, 02:36:23 AM "feel free and adjust" contradict with main "reference tables" usage/meaning, cuz ppl: 1. reference with stock clocks. 2. not always mining w/overclock.
i mean, tweaking/overclocking/customizing/modding-related variations just add [not always necessarily for 1st steps/intro]complexity for newbies, already overhelmed by volume of info. Title: Re: Graphics Cards Post by: qed on June 13, 2011, 02:59:21 AM If you want this to be useful you need to write hash rate _at reference settings_ Overclock it's too much depending on the particular chip you got.
I have a 6950 able to go at 930MHz (from 800MHz) without any overvoltage and another one not able to go over 880MHz. Title: Re: Graphics Cards Post by: Basiley on June 13, 2011, 03:06:51 AM sure. you can get lucky GPU exemplar or not, have good experience/hands/brain in overclocking/buying/systembuilding or not and etc and etc.
anyway table info is "just for reference" to ease comparsion, not make it complex. but separate table[or column in it]about overclocked counterpart performance could be handy too, sure. Title: Re: Graphics Cards Post by: Yuvea on June 17, 2011, 05:13:52 PM so I was playing with those numbers and modified them slightly to account for overclocked cards and for canadian dollars (all prices are pre-tax/shipping, retail and available only).
Card table card price $CAD power (watts) mh/s mh/s / $ mh/s / w 5770 $90.09 108 215 2.39 1.99 5830 $129.75 195 300 2.31 1.54 5850 $189.86 200 350 1.84 1.75 5870 $262.49 210 420 1.60 2.00 6750 $114.99 100 165 1.43 1.65 6770 $107.49 120 195 1.81 1.63 6850 $149.99 175 230 1.53 1.31 6870 $160.12 175 310 1.94 1.77 6950 $244.79 220 360 1.47 1.64 6970 $329.99 250 400 1.21 1.60 6990 $745.00 475 800 1.07 1.68 Seems to me that the best deals in terms of performance/$ are: 5770, 5830, 6870. In terms of performance/watts: 5870, 5770, 6870. When looking at the best performer overall: 6990, 5870, 6970 Now finding a bunch of 5870s in Canada is a PITA and is most likely done through the used market (where the prices are even better!) |