Why does R9 390 have so SLOW CLOCK SPEED ?

Toggle sidebar Toggle sidebar
Solution
JackNaylorPE


If the previous message wasn't clear enough

perfrel_1920.gif


Add on the 17% OC versus the 8% OC as well as the fact that a non reference 390 is compared with a reference 970 which is about 3% slower and the difference is 103 x (117/108 ) x (103/100) and you come up with the 970 being about 15% faster averaged over the 19 games. Of course you should look at the individual results for each game that you play as the average may not reflect what you are playing. Start here:

http://www.techpowerup.com/reviews/Powercolor/R9_390_PCS_Plus/6.html

If you don't use Afterburner...
Sort by date Sort by votes
JackNaylorPE

JackNaylorPE

Titan
BANNED
Oct 30, 2004
32,255
14
99,960
1. Clock isn't everything

2. The 970 is not in fact slower than the 390 when both cards are overclocked to the max. At 1080p, the 970 is 4% faster outta the box... at 1440p the 390 is 1% faster outta the box.

3. Overclocking a 390 non-reference card took BF3 @ 1440p to 84.4 fps from the reference card's 78.0 fps ... a mere 8.2 %. This is typical of most of the R9 series cards both 2xx and 3xx

http://www.techpowerup.com/reviews/Powercolor/R9_390_PCS_Plus/33.html

Here we see a non-reference 970 with a 17.1 OC (133.5 / 114.0)
http://www.techpowerup.com/reviews/MSI/GTX_970_Gaming/30.html

AMD cards are very aggressively clocked in the box which leaves little room for manual overclocking.
 
Upvote 0 Downvote
MarkW

MarkW

Judicious
Dec 7, 2009
6,308
0
32,960
1010 MHz GPU speed is not slow. That is 1.01Ghz!
Memory Clock: 1500 MHz -- 6000 MHz effective. 6Ghz memory also is not slow. 7Ghz GDDR5 exists, but it costs more, and that would raise the price.

Overclocking is hit and miss. Every single GPU and CPU on the market overclock differently. Some overclock a lot, and some just do not.

So you cannot count on an overclock when you buy a card. Not from AMD. Not from Nvidia.
 
Upvote 0 Downvote
4745454b

4745454b

Titan
Moderator
Apr 29, 2006
29,241
437
93,590
People still ask this question?

https://en.wikipedia.org/wiki/Megahertz_myth

You can't look at only one part of something and decide how fast it is. Which car is faster, one with a 4 speed or 5 speed tranny? 250hp or 275? Without looking at everything; weight, gearing, size/shape/aerodynamics, etc you can't say which is better. Clock speed is the same way. It's only ONE thing that makes up a GPU. Until you look at everything else, you can't know which card is faster.
 
Upvote 0 Downvote
JackNaylorPE

JackNaylorPE

Titan
BANNED
Oct 30, 2004
32,255
14
99,960


If the previous message wasn't clear enough

perfrel_1920.gif


Add on the 17% OC versus the 8% OC as well as the fact that a non reference 390 is compared with a reference 970 which is about 3% slower and the difference is 103 x (117/108 ) x (103/100) and you come up with the 970 being about 15% faster averaged over the 19 games. Of course you should look at the individual results for each game that you play as the average may not reflect what you are playing. Start here:

http://www.techpowerup.com/reviews/Powercolor/R9_390_PCS_Plus/6.html

If you don't use Afterburner to OC your cards, than the difference is only about 6-7%. Again the main difference is that the 2xx / 3xx series has very little overclocking headroom.
 
Upvote 0 Downvote
Solution
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom