At the beginning of this year, Spectre's ghost, Meltdown's two major security holes were revealed, and modern processors were almost affected. However, AMD's natural immunity to fusing is still good, and Intel's situation is even more complicated.
Due to the high-risk vulnerability, Microsoft Windows, motherboard BIOS and even browsers are all blocking the gap. However, a small price other than security is that CPU performance will be lost, depending on the workload, the overall size is small. .
In May of this year, Google also reported a variant of the Ghost Vulnerability 3a, variant 4, Microsoft released a fix in June, motherboard makers such as Asus also released the BIOS after getting the Intel microcode update. According to Intel, the performance loss is between 2% and 8%.
TechSpot tested the performance of Intel i7-8700+Z370-F before and after the modification of variant 4.
Benchmarks
Cinebench R15 has not changed, even multi-threading has improved 3cb.
In CPU-z, single thread loss is 3%, multithreading loss is 1%.
Corona rendering time, performance loss of 1%.
7-zip performance loss is less than 1%.
Game test
"Battlefield 1" average frame is reduced by 1 frame, 1% minimum frame number (that is, 99% of the frames in the game are higher than this value, the higher the better).
"Far Cry 5" average frame is reduced by 2 frames, 1% minimum frame number is down 1 frame.
"Rainbow Six: Siege" average frame reduced by 1 frame, 1% minimum frame number fell by 2 frames.
"Fortress Night" average frame is reduced by 5 frames, 1% minimum frame is down 4 frames.
to sum up
The performance loss in the actual measurement is between 1% and 3%, which is lower than the 2~8% 'warning' of Intel. Although these minor changes will be suspected of 'error', But from the consistent trend of all projects, the performance loss is almost realistic.
In addition, TS proposes a more critical argument, In the previous ghost, fuse repair, the Intel platform has lost performance, so this change if the state is not compared with last year before the patch, the gap may be more obvious, especially the number of game frames.
It is reported that Intel has announced a quarterly security patch update operation, we may never return to the past.
