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1.intel 386 sx25 4 mb ram
system cost =$3000
Overclock =sx33mhz ,user cost =$0.If bought as 33 mhz extra cost =$700.
speed increase=32% for 0 cost.
Moving thru various intel systems Ive used/owned/built,486sx dx,dx2,dx3,dx4,the speed increase for 0 cost was about the same.
Initial pentium 90 would oc ro 100(mhz) by blowing on it n saying hey presto
great for ultima underworld 2 and system shock1.
I never did try for a higher speed. on a 90.
3 year break for rl stuff.
Intel celeron 300a..the return of the king.
stock 300.. overclock 500.. speed increase 66% for 0 cost and totally stable
The "wilderness years" amd duron 1200.
Overclock capability .next to nothing and it allways ran hot anyway.
Now..or at least 2004-2011
(a)pentium D820 ,dual core in a piggyback form,sort of like the bugatti veyron engine but slightly cheaper.
Overclock 40% but I no longer run it at that..core temp measurement only comes from one core ,even tho it shows as 2 so throttling can occur and u wont know it.
Max stable 24/7 overclock (for me)=3.9ghz ,ie just below 40% speed increase,2.8 ghz default.
(b)q8400 775 (stock speed=2.66ghz)
max stable overclock 4.0ghz,with a good system.
cost=20 % more for a 50% cpu speed increase(not 50% performance increase)
passing over 1156 and 1366,which are of course clockable,but not in excess of 50% on air.
(c)i5 2500k/i7 2600k in more detail:
stock speed -3.3-3.4ghz but actually all versions can reach 3.7-3.8 stock with turbo,,,,
2500 upgrade to 2500k cpu cost =$10-$20
mbrd..h67 will do 3.7ghz but say $20-30 extra for a basic p67 or z68
Leaving aside the memory aspect.
2500k base speed 3.3ghz,will go 4.8ghz for 24/7 operation with a reasonable system,but reasonable means extra cash for nonintel cooler ,extra fan(s) etc say $100 over a dell spec.
The "game breaker is standard say 3.3 but standard turbo= 3.7 which the intel cooler can handle no sweat.
So lets see:
1.3700mhz /100= 37 mhz=1% of max normal cpu speed.lets take it that any normal system should be able to achieve that.
2.take 4500mhz as a maximum speed with a standard intel cooler and a clockable system.
3.take 5.0ghz as a max 24/7 cpu speed with a fairly good air cooled system.
4500/37= say a 27% speed increase to be optimistic.thats not a performance increase of course ..that would be more like 22%
5000/37= a 35% speed increase which would probably be a 25% system speed increase:
More cpu speed increase =lower overall pc performance increase relatively.
ie 20% cpu speed increase might give 15% pc overall performance increase from standard.but 25% cpu speed increase might only give like 17%pc performance increase.
cpu + 20=pc +15,cpu + 25=pc + 17-18 etc.
Look at it another way and 3.3ghz increased to 5.0ghz is a 50% speed increase,but the 2500k processor should really be considered as 3.7ghz,mho.
Taking into account the easy clockability at least to 4.4-4.5ghz.were really just seeing a continuation of the intel "you want a 30% overclock..here it is easy as falling off a log" but u aint never gonna get the overengineering error we made with the celeron 300 no more.
Thats not to say newer cpu performance isnt better,newer instruction sets etc. I mean my i5 2500k at stock 3.3-3.7ghz is better than my q8400 at 4.0ghz and my D820 isnt in the frame.
system cost =$3000
Overclock =sx33mhz ,user cost =$0.If bought as 33 mhz extra cost =$700.
speed increase=32% for 0 cost.
Moving thru various intel systems Ive used/owned/built,486sx dx,dx2,dx3,dx4,the speed increase for 0 cost was about the same.
Initial pentium 90 would oc ro 100(mhz) by blowing on it n saying hey presto
great for ultima underworld 2 and system shock1.I never did try for a higher speed. on a 90.
3 year break for rl stuff.
Intel celeron 300a..the return of the king.
stock 300.. overclock 500.. speed increase 66% for 0 cost and totally stable
The "wilderness years" amd duron 1200.
Overclock capability .next to nothing and it allways ran hot anyway.
Now..or at least 2004-2011
(a)pentium D820 ,dual core in a piggyback form,sort of like the bugatti veyron engine but slightly cheaper.
Overclock 40% but I no longer run it at that..core temp measurement only comes from one core ,even tho it shows as 2 so throttling can occur and u wont know it.
Max stable 24/7 overclock (for me)=3.9ghz ,ie just below 40% speed increase,2.8 ghz default.
(b)q8400 775 (stock speed=2.66ghz)
max stable overclock 4.0ghz,with a good system.
cost=20 % more for a 50% cpu speed increase(not 50% performance increase)
passing over 1156 and 1366,which are of course clockable,but not in excess of 50% on air.
(c)i5 2500k/i7 2600k in more detail:
stock speed -3.3-3.4ghz but actually all versions can reach 3.7-3.8 stock with turbo,,,,
2500 upgrade to 2500k cpu cost =$10-$20
mbrd..h67 will do 3.7ghz but say $20-30 extra for a basic p67 or z68
Leaving aside the memory aspect.
2500k base speed 3.3ghz,will go 4.8ghz for 24/7 operation with a reasonable system,but reasonable means extra cash for nonintel cooler ,extra fan(s) etc say $100 over a dell spec.
The "game breaker is standard say 3.3 but standard turbo= 3.7 which the intel cooler can handle no sweat.
So lets see:
1.3700mhz /100= 37 mhz=1% of max normal cpu speed.lets take it that any normal system should be able to achieve that.
2.take 4500mhz as a maximum speed with a standard intel cooler and a clockable system.
3.take 5.0ghz as a max 24/7 cpu speed with a fairly good air cooled system.
4500/37= say a 27% speed increase to be optimistic.thats not a performance increase of course ..that would be more like 22%
5000/37= a 35% speed increase which would probably be a 25% system speed increase:
More cpu speed increase =lower overall pc performance increase relatively.
ie 20% cpu speed increase might give 15% pc overall performance increase from standard.but 25% cpu speed increase might only give like 17%pc performance increase.
cpu + 20=pc +15,cpu + 25=pc + 17-18 etc.
Look at it another way and 3.3ghz increased to 5.0ghz is a 50% speed increase,but the 2500k processor should really be considered as 3.7ghz,mho.
Taking into account the easy clockability at least to 4.4-4.5ghz.were really just seeing a continuation of the intel "you want a 30% overclock..here it is easy as falling off a log" but u aint never gonna get the overengineering error we made with the celeron 300 no more.
Thats not to say newer cpu performance isnt better,newer instruction sets etc. I mean my i5 2500k at stock 3.3-3.7ghz is better than my q8400 at 4.0ghz and my D820 isnt in the frame.