Hi,
I was looking at this review and have questions as it just doesn't seem right. Most reviews for X2 vs two 3870s seem to show the same, but that doesn't add up.
http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/4236-ati-radeon-hd3870-x2-1gb-review-11.html
When the reviews were done for "HD3870 X2 versus HD3870 512MB Crossfire", do you think most reviewers used an X38 motherboard that has full 16x speeds for both PCIe2.0 slots? As you might know, that chip that links the two GPUs on the 3870X2 is only PCIe1.1. So when both single 3870s are running at full PCIe2.0, and in crossfire, I find it odd that the 3870X2 would outperform two 3870s in crossfire. After all the specs are the same (640 (320 x2) stream processing units and 512 (2 x 256-bit) memory interfaces). Also, two 3870s have 1GB DDR4 vs 1GB DDR3 on the X2.
I was looking at this review and have questions as it just doesn't seem right. Most reviews for X2 vs two 3870s seem to show the same, but that doesn't add up.
http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/4236-ati-radeon-hd3870-x2-1gb-review-11.html
When the reviews were done for "HD3870 X2 versus HD3870 512MB Crossfire", do you think most reviewers used an X38 motherboard that has full 16x speeds for both PCIe2.0 slots? As you might know, that chip that links the two GPUs on the 3870X2 is only PCIe1.1. So when both single 3870s are running at full PCIe2.0, and in crossfire, I find it odd that the 3870X2 would outperform two 3870s in crossfire. After all the specs are the same (640 (320 x2) stream processing units and 512 (2 x 256-bit) memory interfaces). Also, two 3870s have 1GB DDR4 vs 1GB DDR3 on the X2.