Has anyone run across this issue?
Some background:
I recently installed an EVGA 8800GT (plain vanilla - no overclock), and I botched the install a bit because I neglected to uninstall the drivers for my 7900GTO before installing the 8800GT drivers. Once I got that all figured out, I ran some benchmarks and was surprised to find that my scores with the 8800GT were all lower than with my 7900GTO. I was at about 5900 in 3DMark06 before the upgrade and about 5200 after. In 3DMark05, I was at 10,200 approximately before and about 9800 after. My Fear benchmark improved ever so slightly from 38FPS average to 39FPS at 1920x1200 with all of the goodies enabled. I flashed the BIOS for my motherboard as well as the chipset driver, but that didn't seem to solve my problem. Device manager shows the adapter as working properly. As I was looking for the root cause, I noticed that my CPU usage was heavily assymetrical. At idle, core 1 was under heavy usage while core 2 was barely registering. Under load, the second core ramps up, but seems to stay about 30% below core 1, unless core 1 is maxed. Task manager shows only system idle processes taking up 98 to 99% of the cycles. When I click the "Performance" tab and select View>Show kernel times, almost all of the usage is kernel related (shows up red).
Since I can't identify specific processes that may be causing this issue, I'm wondering what my next steps should be in getting to the root cause of my problems, both with the strange CPU usage and my graphics card performance. I think I will try uninstalling the 8800GT and reverting fully to the 7900GTO and see if I can replicate my old benchmarks and, more importantly, see if this solves my assymetrical cpu usage issue. Is there a CPU analyzer that can give me more info on what the heck core 1 on my CPU is doing? I have CPU-Z installed, but all that tells me is that both cores are 2.4GHz.
Oh, a couple of other bits of information that may or may not matter:
1) CPU-Z shows my multiplier occasionally going from the normal value of 9 down to 6 and back again, or course affecting the clock speed (2.4GHz to 1.6GHz). Is this normal?
2) The CPU usage for core 1 bounces constantly in 3-10 %pt increments, so it will go from 35 to 41 to 32 to 38, etc., changing every second or two. Again, is this normal? All the while, core 2 is barely registering any usage...most often zero.
3) It's been about a week since my last anti-virus and spyware scan (ZoneAlarm)...I kicked off a scan this morning so I'll see if it turns up anything when I get home this evening.
Any suggestions? I'd really appreciate some help as I'm pretty new to being my own sysadmin since building my computer late last year.
Some background:
I recently installed an EVGA 8800GT (plain vanilla - no overclock), and I botched the install a bit because I neglected to uninstall the drivers for my 7900GTO before installing the 8800GT drivers. Once I got that all figured out, I ran some benchmarks and was surprised to find that my scores with the 8800GT were all lower than with my 7900GTO. I was at about 5900 in 3DMark06 before the upgrade and about 5200 after. In 3DMark05, I was at 10,200 approximately before and about 9800 after. My Fear benchmark improved ever so slightly from 38FPS average to 39FPS at 1920x1200 with all of the goodies enabled. I flashed the BIOS for my motherboard as well as the chipset driver, but that didn't seem to solve my problem. Device manager shows the adapter as working properly. As I was looking for the root cause, I noticed that my CPU usage was heavily assymetrical. At idle, core 1 was under heavy usage while core 2 was barely registering. Under load, the second core ramps up, but seems to stay about 30% below core 1, unless core 1 is maxed. Task manager shows only system idle processes taking up 98 to 99% of the cycles. When I click the "Performance" tab and select View>Show kernel times, almost all of the usage is kernel related (shows up red).
Since I can't identify specific processes that may be causing this issue, I'm wondering what my next steps should be in getting to the root cause of my problems, both with the strange CPU usage and my graphics card performance. I think I will try uninstalling the 8800GT and reverting fully to the 7900GTO and see if I can replicate my old benchmarks and, more importantly, see if this solves my assymetrical cpu usage issue. Is there a CPU analyzer that can give me more info on what the heck core 1 on my CPU is doing? I have CPU-Z installed, but all that tells me is that both cores are 2.4GHz.
Oh, a couple of other bits of information that may or may not matter:
1) CPU-Z shows my multiplier occasionally going from the normal value of 9 down to 6 and back again, or course affecting the clock speed (2.4GHz to 1.6GHz). Is this normal?
2) The CPU usage for core 1 bounces constantly in 3-10 %pt increments, so it will go from 35 to 41 to 32 to 38, etc., changing every second or two. Again, is this normal? All the while, core 2 is barely registering any usage...most often zero.
3) It's been about a week since my last anti-virus and spyware scan (ZoneAlarm)...I kicked off a scan this morning so I'll see if it turns up anything when I get home this evening.
Any suggestions? I'd really appreciate some help as I'm pretty new to being my own sysadmin since building my computer late last year.