Bitcoin Forum
August 20, 2018, 08:28:31 PM *
News: Latest stable version of Bitcoin Core: 0.16.2  [Torrent].
 
   Home   Help Search Donate Login Register  
Pages: [1]
  Print  
Author Topic: How to calculate kh/s of an unreleased card?  (Read 379 times)
gpucoolingmethod
Member
**
Offline Offline

Activity: 70
Merit: 10


View Profile
March 01, 2014, 08:22:18 AM
 #1

The upcoming Rx cards are supposedly going to smash records on the price/performance ratio.

Given that all their specifications are known how can one calculate their hashrate???

(with exact same settings of course)
BOUNTY PORTALS
BLOG
WHERE BOUNTY MANAGEMENT
MEETS AUTOMATION
SIGNATURE CAMPAIGNS
TWITTER
FACEBOOK
MEDIA CAMPAIGNS
AND MORE!
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
1534796911
Hero Member
*
Offline Offline

Posts: 1534796911

View Profile Personal Message (Offline)

Ignore
1534796911
Reply with quote  #2

1534796911
Report to moderator
Gator-hex
Hero Member
*****
Offline Offline

Activity: 490
Merit: 500


View Profile
March 01, 2014, 11:54:55 AM
 #2

Number of stream processors units (SPUs) is usually a good guide.

HD7850 = 1024SPUs
HD7970 = 2048SPUs = 2x as fast.
2x HD7850s = 1024+1024SPUs = as fast as a HD7970

gpucoolingmethod
Member
**
Offline Offline

Activity: 70
Merit: 10


View Profile
March 01, 2014, 11:55:50 AM
 #3

Number of stream processors units (SPUs) is usually a good guide.

thanks anything else i can use?
Gator-hex
Hero Member
*****
Offline Offline

Activity: 490
Merit: 500


View Profile
March 01, 2014, 12:05:54 PM
 #4

Number of stream processors units (SPUs) is usually a good guide.

thanks anything else i can use?

Yes, don't forget to look at the max TDP Watts, it's a good guide on which is most power efficient.

All take power from the Motherboard = 75W
6-Pin PCI-E power connector = 75W
8-Pin PCI-E power connector = 150W

HD7850 = 1024SPUs = 150W max = 6.83SPUs/W
HD7970 = 2048SPUs = 375W max = 5.46SPUs/W

Therefor you should find 2x HD7850s give the same hashing power for 25% less watts.

gpucoolingmethod
Member
**
Offline Offline

Activity: 70
Merit: 10


View Profile
March 01, 2014, 01:44:50 PM
 #5

Number of stream processors units (SPUs) is usually a good guide.

thanks anything else i can use?

Yes, don't forget to look at the max TDP Watts, it's a good guide on which is most power efficient.

All take power from the Motherboard = 75W
6-Pin PCI-E power connector = 75W
8-Pin PCI-E power connector = 150W

HD7850 = 1024SPUs = 150W max = 6.83SPUs/W
HD7970 = 2048SPUs = 375W max = 5.46SPUs/W

Therefor you should find 2x HD7850s give the same hashing power for 25% less watts.

good to know this formula although this isnt what Im asking for.

Im asking how to calculate kh/s of a card not its efficiency
Pages: [1]
  Print  
 
Jump to:  

Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!