differene between intel 3rd generation i7and 4th generation i7
- Thread starter 2_b
- Start date
- May 18, 2007
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Double the L1/L2/L3 cache bandwidths, double the cache associativity, two extra instruction issue ports, 24 extra instruction (192 vs 168) in the reordering buffer, improved branch prediction, Fully-Integrated Voltage Regulator (FIVR), significantly improved IGP...
Plenty of fairly significant improvements architecturally-speaking but all of those only yield a ~7% improvement in most current games and applications so not really worth upgrading to if you already have a SB/IB desktop/laptop. The extra complexity and heat from on-chip VRM also make Haswell more difficult to cool and overclock.
Due to double-VRMing and FIVR's relatively low efficiency, Haswell also looks like it will use 10-30W more power than Ivy Bridge under heavy load.
Plenty of fairly significant improvements architecturally-speaking but all of those only yield a ~7% improvement in most current games and applications so not really worth upgrading to if you already have a SB/IB desktop/laptop. The extra complexity and heat from on-chip VRM also make Haswell more difficult to cool and overclock.
Due to double-VRMing and FIVR's relatively low efficiency, Haswell also looks like it will use 10-30W more power than Ivy Bridge under heavy load.
8350rocks
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- Mar 14, 2013
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About 4-6% improvement in CPU performance, and a minor upgrade of the iGPU you won't use for gaming anyway.
There were some architecture changes, but nothing that makes performance significantly better...you're better off not upgrading...if you're building a new build, you're better off with Ivy Bridge or AMD.
There were some architecture changes, but nothing that makes performance significantly better...you're better off not upgrading...if you're building a new build, you're better off with Ivy Bridge or AMD.
- May 18, 2007
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While there is no denying the results were modest, the changes themselves were quite extensive and technically significant. That's what makes Haswell so depressing.
It simply shows that squeezing any more IPC/ILP out of individual x86 threads is becoming as difficult as squeezing water out of rocks.
ahmedshihab
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- Oct 18, 2013
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it looks like 4th generation can get hot. Nothing is worth it if the processor can get hot right?
Josh French
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- Feb 9, 2014
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Go with the 3rd gen 6-8 mb cache for desktop, 4th gen 6 mb cache for laptop. 4th gen is mostly better battery life and upgraded integrated GPU from what i understand. Has to do with Intel's tick tock principle. Be careful of the i7 4500u and i7 4600u. They only come with 4 MB cache and are duel core. Terrible for gaming!
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