An RTX 3080 @2.1Ghz exceeds the performance of the RTX 3090 @ 1.7Ghz

[g67575]

RTX 3080 @2.1 GHz

36.5 TFlops

Pixel Rate: 201.6 GPixel/s

Texture Rate: 571.2‬ GTexel/s

All three of these performance stats are higher than the RTX 3090 @ 1.7Ghz!

UPDATE - a 25% higher memory clock of 1485 would result in:

Memory bandwidth: 950.4 GB/s

RTX 3090 specs here:
https://www.techpowerup.com/gpu-specs/geforce-rtx-3090.c3622

So, if its possible to clock the RTX 3080 this high, or buy a 2.1GHz model (+22.8% overclock), you would get similar performance for a LOT less money (with less VRAM too though )
No wonder there is no RTX 3080 TI...

 

[g67575]

What this means is, you would likely get similar, or perhaps a bit better performance from an overclocked RTX 3080 vs a RTX 3090 at base clocks, as long as you use less than 10GB of RAM. So, 3080 overclocked is an excellent choice for 4K resolution.

 

[waspy88]

Based on... your assumptions?

 

[g67575]

Nope, it can be easily worked out.

Obviously, a RTX 3090 @ 2.1ghz is still gonna be a lot faster than any RTX 3080, but for a massive increase in price.

 

[waspy88]

Yeah.. but still not based on reality is it? - Probably best to wait for the reviews to come out rather than speculating all of this.
There are so many variables with the extra Cuda cores, higher memory bandwidth and other dedicated components.

 

[Nablaoperator]

Okay i thought these were actual leaked results.. and got hyped up about it.

These theoretical calculations do not represent real world performance, because of
a) pipeline physics (you will need a primer on queue theory to appreciate this)
b) shader cores might not be the bottleneck. from my limited research a shader core is basically an operator that can perform a multiply and add operation per clock (2*3+1=7).. its probably the dumbest building block in the GPU

 

[XeNoNF50]

Based on... your assumptions?

Well, the maths checks out on the TFLOPs. Only thing is both will boost up and overclock up to a similar level so the % difference between the two remains. And the memory on the 3090 is slightly faster and has higher bus width so memory bandwidth on 3090 is 23% higher than 3080.

 

[g67575]

Good point. Does anyone know how important GPU memory bandwidth is for performance in modern GPUs?

EDIT - Overclocking the memory would increase the memory bandwidth too, not sure how much of an increase would be needed though.

 

[Blackjack Davy]

Nope, it can be easily worked out.

Obviously, a RTX 3090 @ 2.1ghz is still gonna be a lot faster than any RTX 3080, but for a massive increase in price.

And a power consumption that'll cripple the National Grid, the power went off here for a hour this afternoon I'd have blamed the new cards landing on everyone's doormats but its a a bit early for that

 

[Greebo]

RTX 3080 @2.1 GHz

36.5 TFlops

Pixel Rate: 201.6 GPixel/s

Texture Rate: 571.2‬ GTexel/s

All three of these performance stats are higher than the RTX 3090 @ 1.695Ghz!

RTX 3090 specs here:
https://www.techpowerup.com/gpu-specs/geforce-rtx-3090.c3622

So, if its possible to clock the RTX 3080 this high, or buy a 2.1GHz model, you would get similar performance for a LOT less money (with less VRAM too though )
No wonder there is no RTX 3080 TI...

except from the leaks so far no AIB is releasing a 3080 faster than 1815 overclocked yet there are 3090s with clocks over 2000........

 

[greatash]

I'm sure they will boost near 2ghz at stock, Pascal and Turing also had conservative stock clocks but would auto an extra 200-300mhz if the cooling is sufficient

I'm not going to oc my 3080, that would make it a 400w furnace

 

[greatash]

-

 

[GAC]

sigh. sing along to the tune of "breaking the law" by judas priest.

making stuff up, making stuff up!!!

 

[g67575]

I wonder how much the watercooled RTX 3080s will cost...

 

[g67575]

Yeah.. but still not based on reality is it?

Funny chap

Reality is overrated anyway

 

[scubes]

if the 3090 doesn't perform gonna be gutted a well give me a excuse to buy a cheap 2080ti for some NV link ..

 

[Psycho Sonny]

RTX 3080 @2.1 GHz

36.5 TFlops

Pixel Rate: 201.6 GPixel/s

Texture Rate: 571.2‬ GTexel/s

All three of these performance stats are higher than the RTX 3090 @ 1.695Ghz!

RTX 3090 specs here:
https://www.techpowerup.com/gpu-specs/geforce-rtx-3090.c3622

So, if its possible to clock the RTX 3080 this high, or buy a 2.1GHz model, you would get similar performance for a LOT less money (with less VRAM too though )
No wonder there is no RTX 3080 TI...

There is no 3080ti or super because they will be released later as was the case with the 1070ti and 2070 super

 

[g67575]

Meh, no TIs or Super's this year (not that I could afford them anyway)

 

[Kaapstad]

RTX 3080 @2.1 GHz

36.5 TFlops

Pixel Rate: 201.6 GPixel/s

Texture Rate: 571.2‬ GTexel/s

All three of these performance stats are higher than the RTX 3090 @ 1.695Ghz!

RTX 3090 specs here:
https://www.techpowerup.com/gpu-specs/geforce-rtx-3090.c3622

So, if its possible to clock the RTX 3080 this high, or buy a 2.1GHz model, you would get similar performance for a LOT less money (with less VRAM too though )
No wonder there is no RTX 3080 TI...

Only one small snag with this.

A RTX 3090 will never run as slow as 1.695Ghz, it will boost far higher just like the Turing cards do.

 

[g67575]

To calculate total memory bandwidth, you divide the memory speed by 8 (19gbps) to convert it , which is 2.375 GBytes per second. Then multiply this number by the memory bus speed, which is 320 bits.

Total Memory bandwidth for the RTX 3080 = 760GB/s (which we already know)

Not sure not how the memory clock translates into the memory speed though...

Edit - So you multiply the memory clock by x 2, then multiply the result by the bus width to get the total memory bandwidth.