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显卡是微星的6850,主频800Mhz,960个处理单元。大约一个月前开始挖矿,因为懒,没做研究工作,打开cgminer就用默认配置来挖,速度一直在190Mhash/s上下。不是全时,每天开机15小时,一个月的时间挖了不到0.2个比特币,按现在市价折合18欧元不到。

前两天突然想起机器上有另一块显卡,一直没用起来。于是赶紧动手,解决浪费问题。

这块没用起来的显卡就是apu 3870k里集成的6550d!bios里启用集显和多显示器支持,显示器都接到主板集显出口,把6850超频变成全职挖矿卡。设置cgminer启动参数:

cgminer.exe -o <矿池主机>:<端口号> -u <矿工名> -p <矿工密码> -I 9,d --auto-gpu --gpu-engine 800-920,600 --gpu-memclock 820,667
--temp-overheat 65,25 --gpu-memdiff -100,67

配置参数在cgminer的README里面都有介绍:

-I 9,d:第一块显卡(6850)100%负荷挖矿,第二块(6550d)维持桌面流畅运行
--auto-gpu:自动调整gpu主频,保证显卡不过热同时超频性能最大化,与下面两个参数配合使用
--gpu-engine 800-920,600:显卡gpu主频定义,6850->在800-920Mhz之间依据温度动态调整
                                         6550d->600Mhz
--temp-overheat 65,25:显卡过热温度,6850->65度,6550d->25度
--gpu-memclock 820,667:显存频率,6850->820Mhz,6550d->667Mhz
--gpu-memdiff -100,67:动态改变显卡主频时,相应调整显存频率
                                         6850->显存频率=gpu主频-100Mhz
                                         6550d->显存频率=gpu主频+67Mhz

启动cgminer后,全局速度在305Mhash/s左右浮动:

 cgminer version 3.1.0 - Started: [2013-05-13 09:29:18]
--------------------------------------------------------------------------------
 (5s):302.9M (avg):135.1Mh/s | A:252  R:4  HW:0  U:1.7/m  WU:1.9/m
 ST: 6  SS: 24  NB: 15  LW: 0  GF: 0  RF: 40
 Connected to pool.50btc.com diff 1 with LP as user weemeehill[AT]gmail.com_diff1
 Block: 010d5dc97dd37879...  Diff:11.2M  Started: [11:55:22]  Best share: 427
--------------------------------------------------------------------------------
 [P]ool management [G]PU management [S]ettings [D]isplay options [Q]uit
 GPU 0:  56.0C  56%    | 242.8M/96.84Mh/s | A:160 R:2 HW:0 U:1.09/m I: 9
 GPU 1:  13.0C         | 63.56M/38.41Mh/s | A: 92 R:2 HW:0 U:0.62/m I: 2
--------------------------------------------------------------------------------

 [2013-05-13 11:54:22] Accepted f9109709 Diff 1/1 GPU 1
 [2013-05-13 11:54:40] Accepted b7b45b04 Diff 1/1 GPU 0
 [2013-05-13 11:54:48] Accepted 338ae257 Diff 4/1 GPU 0
 [2013-05-13 11:54:49] Accepted 0db79709 Diff 18/1 GPU 0
 [2013-05-13 11:54:52] Accepted a13a49f1 Diff 1/1 GPU 0
 [2013-05-13 11:55:03] Accepted 40fa946e Diff 3/1 GPU 0
 [2013-05-13 11:55:20] Rejected 8b65f420 Diff 1/1 GPU 1
 [2013-05-13 11:55:22] LONGPOLL from pool 0 detected new block
 [2013-05-13 11:55:30] Pool 0 http://pool.50btc.com:8332 not responding!
 [2013-05-13 11:55:49] Accepted 98f87fce Diff 1/1 GPU 1
 [2013-05-13 11:56:11] Accepted f5860891 Diff 1/1 GPU 0
 [2013-05-13 11:56:12] Accepted 0360af4b Diff 75/1 GPU 0

说来这6550d真算是强悍了,作为一块集成显卡还能有60Mhash+的算力,而且貌似以前玩游戏的的时候也可以跑得起来nfs这一级的玩意儿,不知道A10里面集成的7660d能强到啥程度。。。

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