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Be careful to compare apples with apples here. He told us what GPU he has, but not what CPU. Depending on the CPU, the comparison could be skewed in either di
by amalcon 15y ago
Be careful to compare apples with apples here. He told us what GPU he has, but not what CPU. Depending on the CPU, the comparison could be skewed in either direction.
A Radeon 5770 apparently uses 108W[1] when fully loaded. Newegg's cheapest non-open-box Radeon 5770[2] costs about $120. The price is the same as a 3.0-3.2GHz Phenom 4-core, and the power usage falls right between them[3].
If he has one of these (or a similar Intel), it's roughly comparable. If he has a cheap or older CPU, the result is closer than it looks. If he has one of the high-end six-core CPUs, then it's an even larger gap.
[1]http://www.tomshardware.com/reviews/radeon-hd-5770,2446-15.html http://www.tomshardware.com/reviews/radeon-hd-5770,2446-15.h...
[2]http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&IsNodeId=1&Description=Radeon%205770&bop=And&Order=PRICE&PageSize=20 http://www.newegg.com/Product/ProductList.aspx?Submit=ENE...
[3]http://www.newegg.com/Product/Product.aspx?Item=N82E16819103808 http://www.newegg.com/Product/Product.aspx?Item=N82E16819103...
- dvijaydev46 15y agoI have a Phenom X4 940BE. While Cain isn't threaded for bruteforcing and hence does just 10 million NTLMs, a threaded Cain would do about 40 million I suppose. Optimized software like hashcat would do even more but not anywhere near 3.3 billion.
- iwwr 15y agoMaybe because CPUs are no longer competitive. A Bitcoin miner is essentially cracking a SHA256 hash (with zeros added for difficulty control). GPUs are 20-50 times more efficient power-wise than CPUs at this task. Interestingly, the AMD architecture adds a factor of 3-5 in the mix, compared to NVidia. http://webcache.googleusercontent.com/search?q=cache:FSUbAiIxrU0J:https://en.bitcoin.it/wiki/Why_a_GPU_mines_faster_than_a_CPU+bitcoin+mining+amd+nvidia&cd=1&ct=clnk http://webcache.googleusercontent.com/search?q=cache:FSUbAiI... For a more detailed comparison: http://webcache.googleusercontent.com/search?q=cache:9FiOofDGPJAJ:https://en.bitcoin.it/wiki/Mining_hardware_comparison+bitcoin+mining+hardware+comparison&cd=1&ct=clnk http://webcache.googleusercontent.com/search?q=cache:9FiOofD... Note that a PS3 Cell processor falls somewhere between a CPU and a GPU: